Projection type headlights with static backlight. Types of headlights. Game without rules

It seems that the fashion for eye-eaten “collective farm” xenon has finally passed, but today LED artillery, which has not yet been banned, is entering the battle. A logical question arises: are the standard headlight bulbs really so bad that you need to look for an alternative, or are there other options?

Kulibins will not disappear in Russia, no matter what GOSTs and TUs are admonished to them, no matter what fines they intimidate for interfering with the design of the car. And the reason here is not at all the itch of invention. Most standards of civilization end beyond the bypass roads of large cities.

The hype around LED or LED bulbs has fueled Chinese manufacturers lighting equipment, throwing it onto the market for last years a huge number of product options for headlights. Whether it is of good quality or not is another matter, but the buyer, as they say, caught fire.

Game without rules

Indeed, modern LEDs can last up to forty years; they are insensitive to temperature changes, and most importantly, to vibrations and shocks. And the light output, at first glance, is considerable - up to 30–60 lm/W or more versus 10–17 lm/W for an incandescent lamp, and it grows, with the development of technology, from year to year.

It would seem, buy and install such light bulbs, besides, the cunning Chinese have produced them in all known types of bases, which we recently wrote about. There are a great variety of designs: with one or more LEDs, with or without a small focusing lens... Sellers promise fantastic light, but, alas, they are lying to the eye.

But what about UNECE rules No. 112, on the basis of which national standards for automotive lighting were created, in particular GOST R 41.112–2005? After all, they clearly state that headlights marked C - low beam, R - high beam, CR - dual-mode (low and high beam) beam, and they are either designed to work with incandescent lamps, or in the case of the markings HC, HR and HCR are suitable, accordingly, only for halogen incandescent lamps. For HID gas dischargers, or xenon lamps, their headlight standards are UNECE rules No. 98 or GOST R 41.98–99. All of them are on the official website of the Economic Commission for Europe.

For LED headlights headlights (not to be confused with today's standardized daytime running lights!) uniform rules are still under development, i.e. GOST only shines for them, which gives rise to a huge number of experiments by car owners.

Focus with focus

Alas, the experimental way to achieve results is not always the best and shortest, and trying to achieve the perfection of Volkswagen, Opel or Audi, which has LED headlights costing several thousand euros per unit in its A8 or R8 models, is not guaranteed to work. Getting to the level of Peugeot or Kia is also unlikely - and everything is not easy there.

It’s not just about that very “bird” that each of us saw on the focusing stand - the main parameter correct settings headlights You can get something similar with LEDs, and the light spot will be tolerable in shape.

It would seem that the LED temperature is correct (4500–5000 K), and the brightness is colossal (up to 3000 lm) with a power consumption of 20–30 W, but still the headlights will either shine mediocrely or be blinding. And the point here is not only in the brightness of the light source, but also in its geometric characteristics. What we see in the headlights largely depends on the shape, size and orientation of the tungsten filament.

For example, a filament strictly 4.1 mm long is required for a lamp with an H7 socket and not only that. Moreover, the distance from the base support area to the bottom edge of the spiral should be exactly 25 mm! A system for dispersing and focusing the headlights of the vast majority of cars has been developed for them: either a spotlight system - with a traditional design of reflectors and lenses, or, in common parlance, a lensed system - a projector system. But not under the glowing squares, rectangles and ovals of LEDs.

For LED headlight designs, special projector focusing schemes are still used, which are fundamentally familiar from both halogen and xenon headlights. Premium segment cars began to use matrix configurations for beam formation and control, which require complex calculations and expensive auxiliary electronics.

Even the simplest LED lamps require pulsed, stabilized power supply and a cooling system - the basis for correct, long and uninterrupted operation devices. Not to mention the mentioned focusing structures, which cannot be done on the knee.

Yes, there are companies that have mastered the production of LED headlight assemblies. For example, in the line of the German Herth+Buss there is a version for our Niva. True, the set will cost as much as 44 thousand rubles! Again, German Hella, American J.W. Speaker and other companies have launched the production of projector focusing LED modules that are mounted in certain types of headlights. But to mass production none of this is relevant yet.

Before playing tricks with headlights, it’s a good idea to turn to your 7th grade school physics textbook. Read about illumination, luminous intensity, reflectance of various surfaces. You can finally check out the online resource, where some patented headlight designs are presented.

Light at the end of the tunnel?

So, do we have any chance of getting excellent headlights at a reasonable cost? If we talk about LED low and high beams, then today this is the case. Until a unified design of headlights for LED lamps appears, this pleasure will either be insanely expensive or ineffective.

But there is still a way out, even with the notorious halogens. A well-made, serviceable and adjusted headlight, even with a 55-watt bulb, will provide safe lighting in most cases. Naturally, if the headlight glass is not covered with dirt, the reflector has not peeled off, and the voltage in the car network is at least 12 V.

If, despite all the conditions being met, you are not satisfied with the job standard headlights, you can try to supply analogues from alternative manufacturers, if any are found. However, if you like tuning headlights with modified filling, get ready for the fact that they will most likely be Chinese or Taiwanese. For owners of VAZ products - domestic ones.

Approximate cost of headlights for popular models cars in Russia, rub./pcs.

car brand Original Depo (Taiwan) Hella (Germany) Direct parts (China) Magneti Marelli (Italy) Alkar (Spain)
Hyundai Solaris 8340 - - 4800 - -
Renault Duster 5209 2994 - - - 4059
Renault Logan 4441 1955 - - - 2409
VW Polo sedan 9841 5037 10 775 - 7952 -
Lada Granta 4900 - - - - -
Skoda Octavia 9190 - - - 10 012 -
Chevrolet Cruze 16 390 4194 - - - 9336
Nissan Qashqai 10 924 7480 9190 - - -
Kia cee'd 29 430 - - - - -
Nissan Almera 13 120 5810 - - - -

Usage: headlight projection type, intended for self-propelled vehicles, in which between the screen 3 and the lens 4 at the lower side of the latter there is a reflective segment 5, the reflective surface of which is located at the side of the lens 4 and is inclined at an angle in the vertical section (i 5). The objective 4 is followed by a refractor equipped with strip lenses 62 of diameter (R) and width (H), the lenses covering the reflective surface 51 of the segment 5. The reflective surface 51 is either circularly symmetrical or planar. 5 salary f-ly, 4 ill.

The invention relates to a projection-type headlight intended for self-propelled vehicles, wherein the headlight has an increased intensity of illumination by a passing light beam above the boundary of light and darkness and increased penetration of light into fog. In the case of well-known elliptical diopter headlights comprising an elliptical reflector, a screen and a lens, the lens is designed to direct the light beam away from the reflector so that it is directed almost entirely below a horizontal plane, so that the intensity of illumination above said plane is minimal. This makes it possible to reduce the glare of drivers of passing vehicles, but, on the other hand, due to poor lighting, the perception of vertical road signs or signals is limited, since the brightness of the transmitting surfaces of such signs when illuminated by such headlights is relatively low. This reduced light intensity above the light-dark boundary does not allow the driver to sufficiently control his activities in the upper part of the operating space. This can have a negative impact on any movement on untreated and unlit roads, in particular in the absence of the so-called silhouette visibility created by the light of passing cars. A headlight for self-propelled vehicles is known, containing a concave reflector for integrating light, a light source located in the inner part of the reflector, a lens, a refractor, and a screen located between the reflector and the lens. It is an object of the present invention to overcome the disadvantages of the prior art as mentioned above and to provide an improved headlamp comprising a concave reflector which is designed to integrate light generated by a light source. In front of the reflector there is a screen for establishing and forming the upper part of the beam of transmitted light or light in fog and a lens for displaying the brightness contrast of the dark surface of the background screen of the light reflector on the road. On the underside of the lens according to the present invention, a reflective segment is provided, the reflective surface of which faces the lens. In a vertical section, the reflective surface has an inclination of the radius of the focal hole of the lens and forms a circularly symmetrical, flat or randomly shaped surface. Light from the reflector face strikes the reflective surface of the reflective segment, and the lens creates an image of said surface on the upper half of the space. In the case where the headlamp is equipped with a refractor located behind the lens, the light beam coming from the reflective segment is spread laterally through a stripe lens area that is created on the refractor and which covers the lower part of the lens. At the same time, it is possible to provide optimal level illumination intensity is higher than the border of light and darkness, both in terms of illumination and glare, and improving the visibility of vertical road signs and road markings, as well as any possible obstacles and pedestrians and, in addition, improving the driver's orientation when driving on unlit roads and controlling the position and movement of the vehicle in the forward direction. A preferred embodiment of the present invention is described below with reference to the accompanying drawings, in which: FIG. 1 is a vertical section through A-A headlights; Figure 2 shows a view of the P phase in the direction of the light beam; Figure 3 shows a horizontal section B-B of the headlight refractor; Figure 4 shows the projection of the light rays of the headlight on roadway. As can be seen from the drawings and, in particular, from Fig. 1, the light source 2 of the headlight is located on the axis 12 and close to the top 11 of the concave (parabolic) reflector 1. The light source 2 is formed by a transversely or axially oriented body of approximately cylindrical shape, for example spiral filament of an incandescent lamp or other discharge tube. The reflector 1 is followed by a screen 3, the edge 31 of which is on the same horizontal plane as the fog lamp and at the same time diverges from the low beam headlight. Further from the screen 3 at a distance X F from it there is a lens 4 with a diameter D (Fig. 2), which is designed to collimate the rays 13, 14 coming from the reflector 1. Closer to the lens 4 at its lower side there is a reflective segment 5 having a reflective surface 51 located close to said lens 4, and its angle of inclination i 5 corresponds to the equation: i 5 (2 -1/2 -2 1/2) agc tg (D/X F, (1) where D is the diameter of the lens 4; X F the distance between the screen 3 and the lens 4. The angle i 5 is either constant in the longitudinal direction or varies in a given range along the length, while the vertical size of the light beam formed by it can be adjusted. The reflective surface 51 of the reflective segment 5 is either symmetrical in the circular direction relative to it. axis 52 of this segment 5, or planar. Further from the lens 4 there is a refractor 6 equipped with strip lenses 62. Fig. 2 shows the lens 4, the reflective segment 5 and the refractor 6 with a zone 61 of strip lenses 62, with the said zone 61 completely or partially overlaps the reflective surface 51 of the reflective segment 5. The strip lenses 62 of the refractor 6 are located in an approximately vertical position. As can be seen in Fig. 3, the B-B section of the refractor 6 in zone 61 shows the reflective profile of the lenses 62, the width H of which corresponds to the equation H (0.2 2 1/2)R, (2) where R is the diameter of the strip lenses 62. On a roadway comprising a center line 81, a left shoulder 82, and a right shoulder 83, Figure 4 shows a beam of light 7 having a horizontal left-hand portion 71 of the light-dark boundary and a right-hand portion 72 breaking at this boundary as the light passes, as well as a horizontal portion 73 s fog light. The rays 15, 16 coming from the edge of the reflector 1 are directed by the reflective segment 5 and the lens 4 into the upper half of the space, where they form a beam of light 91. The strip lenses 62 of the refractor 6 develop the said beam 91 into a beam 92. By changing the lateral size of the said beam 92 The light intensity can be adjusted from an optimal value both in terms of illumination and glare. The headlight according to the invention is designed for any self-propelled vehicles operating on land.

Claim

1. A projection-type headlight intended for self-propelled vehicles, containing a concave reflector for integrating light, a light source located in the inner part of the reflector, a lens, a refractor and a screen located between the reflector and the lens, characterized in that it is equipped with a reflective segment with a reflective surface on the lens side, located between the screen and the lens, and the angle of inclination of the reflective surface i 5 in the vertical section corresponds to the following relationship i 5 = (2 -1/2 2 1/2)arctgD/x F, where D is the diameter of the lens; x F is the distance between the screen and the lens. 2. The headlight according to claim 1, characterized in that the refractor is equipped with a zone of strip lenses that covers the lower part of the lens, and the width H of the strip lenses corresponds to the ratio
H = (0.2-2 1/2)R,
where R is the diameter of the strip lenses. 3. Headlight according to paragraphs. 1 and 2, characterized in that the reflective surface of the reflective segment is made of a symmetrical shape in the circular direction. 4. Headlight according to paragraphs. 1 and 2, characterized in that the reflective surface of the reflective segment is made planar. 5. Headlight according to claims 1 and 2, characterized in that the angle of inclination i 5 of the reflective surface of the reflective segment is made to vary in the longitudinal direction. 6. Headlight according to claims 1 to 4, characterized in that the axis of rotation of the reflective surface of the reflective segment is made identical to the axis of the lens.

Recently, in the automotive industry, it is increasingly used during operation, we will look at it in this article.

In general, the effectiveness of any headlights, taking into account modern legislation, lies in the optimal combination of focused bright light and compliance with the cut-off line, which is adopted according to European standards. In other words, the driver must see the road as best as possible, but at the same time not blind other road users. oncoming lane. Russia adopted the European system, which involves strict control over the glare of light, back in Soviet time. Accordingly, we only allow the operation of vehicles that are equipped with appropriate headlights.

Most headlights on Russian roads have been parabolic for a long time. However, today most foreign cars have lenses projection type headlights. What is this gives to the motorist?

Firstly, lensed projection headlights can significantly improve the quality of illumination without the use of xenon lamps, which are known to severely dazzle oncoming drivers.

Secondly, projection headlight installed in a whole complex of modules: high beam, low beam, fog lamp, turn signal and dimensions. This gives an aesthetic appearance car.

Thirdly, such a headlight belongs to floodlight optics, that is, the lens collects light into a single beam. It turns out that the roadway is better and more widely illuminated, while the lighting is uniform and creates a clear cut-off line.

Projection headlights with ellipsoidal reflectors have gained great popularity among motorists. Among their undeniable advantages:

  • increased visibility and visibility;
  • improved efficiency: good light output and at the same time economical;
  • decorative function;
  • improving road safety.

In the Saransk-Avtosteklo showroom you can find any projection type headlights. What is this, you already know, you just need to choose the right model for your car. Repair and polishing of such headlights will be carried out efficiently in our service.

There are many misconceptions when it comes to headlights. Considering that headlights are one of the most important features cars, many people think that there is no misinformation about front optics. After all, it seemed that car front optics had a simple and understandable design. However, there are many types of headlight designs in the auto industry, causing confusion. In this article, I want to clear up any misconceptions and explain the design of various headlights nowadays.

And so I divided the article into three parts:

- Housing and design of headlights

- Lamps

- Other relevant information/Miscellaneous

SECTION 1: Headlight housing and design

The headlight housing is the part of the optics within which the lighting lamp is installed. As you know on modern market There are many different lighting lamps for cars, ranging from conventional halogen to laser technology. The design of the headlight housing also depends on what kind of lighting lamp is installed in the front optics.

Reflector


Headlights with reflectors installed in the front optics housing are the most common in the automotive industry today. Although at the moment there is a tendency to replace headlights with reflectors with lensed optics. I'm not going to bore you with the science of how a car headlight works. In short, a lighting lamp is usually installed inside the headlight next to the reflector. The light that the headlight emits is reflected from the chrome paint that is applied to the reflector. As a result, the light of the lamp, reflected from the chrome surface, comes out onto the road.

Typically, a halogen car lamp will also have a small area of ​​chrome or protective coating made of another material (usually placed on the front end of the lamp), which prevents direct rays of light from entering the eyes of drivers of oncoming cars. As a result, the lamp does not emit light directly onto the road, but hits a reflector, which scatters the light rays and sends them onto the road.

Recently it seemed that this type of lamp would soon disappear from the auto industry. Especially after they appeared. But the bottom line is that today, halogen car bulbs are still the most common in the automotive world.

Lens

Headlights with lenses inside are currently gradually losing popularity to optics with reflectors. Let us remind you that lensed headlights first appeared on expensive luxury cars. But then, as technology became cheaper, front lens optics began to appear on ordinary, inexpensive ones. vehicles.

What are lensed front optics? As a rule, this type of headlights uses lenses instead of reflectors (a special optical bulb that does not reflect the emitted light from the lamps onto the road, but in fact, uses projection to transmit illumination to the road).

Currently, there are a huge number of different types of lenses and designs of lensed headlights.

But the meaning of lensed optics is the same. What is a lens in a headlight and how does it work?


The fact is that licked headlights form a beam of light to illuminate the road in a completely different way, unlike optics with reflectors.

For example, there is also a chrome-plated reflector inside the lens that reflects light from the lamp. But unlike a conventional reflector, the structure of a lensed reflector is created in such a way as not to direct light onto the road, but to collect it in a special place inside the headlight - on a special metal plate. This plate, in essence, collects light into a single beam and redirects it into the lens, which in turn projects a directed beam of light onto the road.

Typically, a lens headlight provides superior light output with a sharp cutoff line and focused beam.

SECTION 2: Lamps

As we have already said, the most important thing in any headlight is the light source. The most common light sources in car headlights are halogen incandescent lamps.

In some cases you will have to purchase new optics. But since LEDs have a very long service life, even today the use of LED road lighting is economically justified.

Lasers (future)


Currently a number automobile companies have already begun to be implemented on some expensive models a new generation of optics, which is equipped with innovative lasers as light sources.

True for now laser optics in the automotive industry it still remains a rarity due to the high cost of manufacturing such optics.

So how do laser optics work? In fact, laser headlights also use LEDs, which, when exposed to the laser, produce a more uniform and brighter glow. Thus, the luminous flux of conventional LEDs is 100 lumens, while in laser optics LEDs produce 170 lumens.


The main advantage of laser headlights is their energy consumption. So, compared to LED automotive optics, laser headlights With LEDs they consume half the energy.

Another advantage of laser headlights is the size of the diodes used. For example, a laser LED, which is one hundred times smaller than a conventional LED, produces the same level of luminescence. As a result, this allows automakers to reduce the size of headlights without losing the quality of road lighting.

Unfortunately, laser light sources in the automotive industry are very, very expensive these days. So in soon laser optics will not be widely used. But in the future, most likely, laser headlights will gradually replace all traditional car lighting sources.

SECTION 3: Other Important Information/Miscellaneous


Now that we've covered everything Various types technologies of front automotive optics, it's time to talk about some emerging issues. So, for example, let's find out whether it is possible to use xenon lamps in halogen headlights and vice versa?

As a rule, to use xenon lamps, the front optics must be equipped with a lens that projects light onto the road. Also, xenon optics are required; as a rule, they are equipped with a headlight range control.

Mostly these days, automatic headlight leveling is used, which changes the angle of the lens in order to protect oncoming drivers from bright daylight xenon headlights. The angle changes depending on the number of passengers inside. Including everything xenon headlights must be equipped with an optics washer, since a xenon light source is not effective with dirty headlights.

As for halogen lamps, unlike xenon lamps, they can be installed in lensed optics. What about LEDs? Since LED lamps, as a rule, have a directional light source, it is not safe to install them in a headlight with conventional reflectors, since in this case the efficiency of road illumination will be low. Therefore, most automakers equip LED optics lenses that project light from LEDs onto the road. More about this below:

Is it possible to install xenon lamps in regular headlights with reflectors?


In principle, it is possible, but nothing good will come of it. Firstly, according to Russian legislation, the use of xenon lamps in headlights with reflectors is strictly prohibited, since this creates a danger for oncoming drivers on the road, who may be blinded by the bright source of light from xenon lamps scattered by the headlight reflectors.

As a result, by installing xenon lamps in headlights with reflectors, you will only get an externally beautiful glow. But road illumination will be much worse than when using halogen lamps, since xenon lighting sources require lensed optics. In addition, xenon lamps installed in the reflector provide disgusting illumination of the road in rainy weather.

In particular, we would like to note that xenon lamps in short term will burn out the chrome plating of your reflectors. As a result, even if you subsequently install halogen lamps again, your headlights will not shine as efficiently as before.

What is the responsibility for installing xenon lamps in headlights with reflectors?

As we have already said, installing xenon light sources in car lights equipped with reflectors for halogen lamps is prohibited.

Thus, in accordance with Part 3 of Article 12.5 of the Code of Administrative Offenses of the Russian Federation, driving a vehicle with lighting devices with red lights or red reflective devices, as well as lighting devices, the color of the lights and the operating mode of which do not comply with the requirements of the Basic Regulations for the admission of vehicles to operation and responsibilities officials on security traffic entails deprivation driver's license for a period of 6 months to 1 year with confiscation of xenon equipment and lamps.

That is, in other words, if you illegally install xenon lamps on your car in headlights that are not intended for this type of light source, then you will not be fined, but will be immediately deprived of driver's license, and after the end of the period of deprivation you will have to retake the theoretical exam.

Is it possible to install LED bulbs in a xenon headlight lens?


Theoretically it is possible. But you will have to buy and install either the Chinese version, which is unlikely to please you with the quality of road illumination and durability, or you will have to disassemble the headlight and install another block lens. In the latter option, the quality of lighting will indeed be better and perhaps even more efficient than xenon light sources. But again, if you buy high-quality LED lamps and a block lens for them, which costs a lot of money.

As for the legislation, at the moment there is no direct ban on the use of LED low-beam and low-beam lamps in conventional headlights. high beam. There are also no uniform standards or GOSTs yet that would prescribe rules for the installation and use of LED low- and high-lighting sources on vehicles.


At the moment, rules and standards are just being developed. So in the near future, most likely, everything will happen exactly the same as with xenon lamps. Remember what happened on Russian roads 10 years ago, when every second car was equipped with non-factory xenon. It's the same picture today.

Things get worse every day on the road more cars with non-factory LED low and high beam lamps, when most owners of cars equipped with headlights with conventional reflectors no longer use xenon lighting sources for fear of losing their license (although many have already realized that “collective farm” xenon actually reduces safety on the road).


So using LED lamps in reflectors or lenses for xenon is just as dangerous as using “collective farm” xenon, since an LED lamp will not effectively illuminate the road in a reflector or lens designed for a xenon lamp.

Remember that LEDs also require a special spotlight (a block lens with special equipment that collects light from LED lamp into a beam and directs it into a glass lens).

What is Bi-Xenon?

The term Bi-Xenon means that the car is equipped with a single xenon lamp that performs the work of both a low beam source and a high beam source. Those cars that are not equipped with Bi-Xenon headlights are usually equipped with either halogen lamps or combined light sources (low beam: xenon lamps, high beam: conventional halogen lamp incandescent).

There are two types of Bi-xenon headlights common in the automotive industry.

The first type uses a special shutter in the lens located outside the bulb xenon lamp. As a result, when the high beam is turned on, the curtain directs the light source to the reflector, which then sends light to the lens in the high beam spectrum.

With the second type of Bi-xenon headlights, a special Bi-xenon lamp is used, which, for example, when the high beam is turned on, independently moves the lamp bulb relative to the reflector built into the lens. As a result, light is projected onto the road in the low-beam spectrum.

Which headlights are better: Halogen, Xenon or LED?


There is currently great controversy about this. As they say, how many people, so many opinions. However, today it is already known that halogen lamps cannot withstand any competition compared to xenon and LED artificial light sources.

Hyundai Motor CIS announced its expansion Hyundai trim levels Creta on the Russian market. Version compact crossover with a 1.6-liter engine, 6-speed manual or automatic transmission, can now be equipped with an all-wheel drive system. Previously, only cars with a 2.0-liter engine and a 6-speed automatic transmission were equipped with it.

The company hopes that thanks to this adjustment, the share of all-wheel drive model configurations will exceed 50%.

Hyundai Creta With all-wheel drive, 1.6-liter engine and manual transmission gears in the Active configuration will cost 964,900 rubles. Creta 4x4 with a 1.6 liter engine and automatic transmission gears in the Comfort Plus package are available at an affordable price 1,134,900 rubles.

In addition, the top Comfort package, from today it is called Comfort Plus and costs 20 thousand rubles more. However, it is difficult to call this an increase in price, because not only its name has changed, but also its content, which now includes projection-type headlights with static lamps Turning lights when turning the steering wheel, front fog lights and LED daytime running lights. Previously this equipment was part of Style package, and now it has been included in the “body” of the top version. For mid-spec Active These functions have become available in the new Light package for an additional fee.

Standard equipment on all Creta versions includes: 16-inch steel wheel disks, full-size spare wheel, audio system with USB, AUX connectors, airbags for driver and passenger, ABS + EBD, stabilization system with hill start and descent assist, steering wheel height adjustment, driver's seat height adjustment, Bluetooth, electric windows for front and rear doors, radio control keys on the steering wheel, as well as the ERA-GLONASS emergency call system.

  • , we became aware of this thanks to the Brazilian publication Car and Driver. The budget truck should go into production in mid-2018.
  • The Hyundai stand at the Moscow Motor Show was completely in control.
  • Its closest competitor is Kaptur in top-end configuration will cost 15 thousand rubles less, but it has a 4-speed automatic transmission, not a 6-speed one like the Creta. True, its equipment is a little richer.
  • At the end of February, the model was in the top five popular cars Russian market. A total of 4055 units were sold, and Renault Captur took only 17th place; 1,838 such cars were purchased in February.