Complexity

Pit / Trestle

30 min - 1 h

Tools (for 4B12/4B11 engines):

• screw jack
• balloon wrench
• Screwdriver flat medium
• Ratchet wrench
• Extension (with cardan)
• Head 10 mm
• Head 12 mm
• Straight ring wrench 16 mm
• torque wrench
• Marker
• Hex wrench for fixing the tensioner (or pin)
• Tester
• Wheel chock (shoe)
• Knife (or scissors)

Tools (for 6B31 engine):

• 10 mm bent box wrench

Parts and consumables:

• Oil control solenoid valve MIVEC 1028A021 / 1028A109 intake camshaft (for 4B12 and 4B11 engines, if required)

• Oil control solenoid valve MIVEC 1028A022 / 1028A110 exhaust camshaft (for 4B12 and 4B11 engines, if required)

• MIVEC 1028A053 oil control solenoid valve for exhaust camshaft (for 6B31 engine, if required)

• Oil control valve O-ring MN163682 - 2 pcs. (for 4B12 and 4B11 engines)

• O-ring gasket for oil control valve 1748A002 - 2 pcs. (for 6B31 engine)

• Engine oil
• wires
• Insulating tape
• Rope or wire (for 4B12/4B11 engines)

Notes:

Mitsubushi MIVEC (Mitsubishi Innovative Valve timing Electronic Control system) for 4B12 and 4B11 engines allows you to smoothly change the valve timing in accordance with the operating conditions of the engine. This is achieved by rotating the intake camshaft relative to the exhaust shaft in the range of 25° (crank angle) for the 4B11 engine or 40° (crank angle) for the 4V12 engine and rotating the exhaust camshaft relative to the intake shaft in the range 20 ° (according to the angle of rotation of the crankshaft).
As a result, the moment of the beginning of the opening of the intake valves and the closing of the exhaust valves changes, and, consequently, the value of the "overlapping" time (that is, the time when the exhaust valve is not yet closed, and the intake valve is already open) changes up to its exclusion (zero value).
The Mitsubishi MIVEC system is controlled by an oil control solenoid valve (OCV - Oil Control Valve).
At the signal of the engine control unit, the electromagnet moves the main spool through the plunger, bypassing the oil coming from the engine lubrication system line in one direction or another.
In the event of a malfunction, the system control will be disabled and the camshaft angle will be set to correspond to the latest start of the intake valves opening (maximum lag angle) and the earliest start of exhaust valve closing (minimum lag angle).

Mitsubushi MIVEC system (Mitsubishi Innovative Valve timing Electronic Control - a system for changing the valve opening value) of the 6B31 engine regulates the opening of the intake valves depending on the number of revolutions of the crankshaft. This system allows you to set the optimal amount of valve opening for each moment of engine operation, which allows you to achieve increased power, better fuel efficiency and less toxicity of exhaust gases.
The main elements of the MIVEC system are a camshaft with three cams per pair of valves and rocker arms with rollers running around each camshaft cam. At low engine speeds, each low cam rocker runs around its cam profile. At the same time, the opening of the intake valves is minimal. At high speed, the solenoid valve supplies oil to the channel of the intake rocker shaft. Plungers move under pressure inside the rocker bushings. Each plunger fits into the gap between the high cam rocker toe and the low cam rocker. The kinematic chain is closed, and both rocker arms begin to work along the profile of the high cam. As a result, the valve stroke increases, the filling of the cylinders improves and the engine develops more power.
The controls for the MIVEC intake valve adjustment system are located at the rear of the cylinder head.
In the event of a malfunction of the MIVEC system, its control stops and the gas distribution mechanism operates according to the usual classical scheme.

1. Disconnect the wire from the negative battery terminal.

2. Remove the decorative engine cover as described.

3. (4B12/4B11 engines) Remove the engine accessory drive belt as described.

4. (4B12/4B11 engines) Remove the power steering pump assembly from its bracket with the hoses attached (shown with engine removed for clarity).

Note:

After removal, use a wire or rope to hang the power steering pump assembly with hoses on the body in a place where they will not interfere with the removal and installation of other parts.
It may be possible to remove the intake valve MIVEC valve bolt without removing the accessory drive belt and power steering pump.

5.1. (engines 4B12 / 4B11) Squeezing the clamps of the wiring block, disconnect it from the connector of the oil control solenoid valve on the side of the exhaust valves and unscrew its fastening bolt using a 10 mm socket (see the first photo below). Do the same with the inlet valve (see second photo below).

5.2. (engine 6B31) Squeezing the clamps of the wiring harness, disconnect it from the connector of the oil control solenoid valve and unscrew the bolt securing it to the cylinder head using a 10 mm socket.

6. Remove the valve(s) with O-ring from the cylinder head.

8. To test a MIVEC valve, connect a tester in ohmmeter mode to the valve terminals. Valve resistance at 20°C should be 6.75 - 8.25 ohms.

9. Apply battery voltage to the valve terminals and check that the valve spool moves.

10. Apply a small amount of engine oil to the O-ring and install it to the oil control valve.

Note:

Use only new O-rings for valves.
To prevent damage to the ring gasket, wrap protective tape around the working part of the solenoid valve, on which the oil passages are located, before installation.

11. Install the solenoid valve(s) to the cylinder head.

12. Tighten the valve(s) mounting bolts to a nominal torque of 11 ± 1 Nm.

13. Install all removed parts on the Outlander HL engine in the reverse order of removal.

The article is missing:

• Tool photo
• Photo of parts and consumables

Mitsubishi Innovative Valve timing Electronic Control system (MIVEC): Mitsubishi's electronic valve lift control system, one of the varieties of CVVL and VVL technologies. It does not include phase shift technology.

It was first introduced in 1992 on the 4G92 engine (4-cylinder 16-valve DOHC with a volume of 1.6). Mitsubishi Lancer, Mitsubishi Mirage sedan and hatch are the first cars to be equipped with such engines. Also, MIVEC is the first CVVL technology developed for diesels in the passenger car segment. MIVEC technology is characterized by the absence of phase rotation (phase shift).

How MIVEC works

The MIVEC system is responsible for the operation of the engine valves in various modes (with varying degrees of phase overlap and lift height), according to the speed and with automatic switching between modes. In the main version, this technology had two modes (figure below), in the most recent versions there is a constant change (both exhaust and intake control)

Technology has the following physical meaning:

At low speeds, combustion is stabilized due to the difference in valve lift, as a result of which emission and fuel consumption are reduced, and torque is increased.
At high rpm, more time is spent opening the valves and their lift, which greatly increases the volume of exhaust and intake of the fuel-air mixture (therefore, the engine “breathes deeply”).

Structure of the MIVEC system

Next, we will talk about the engine with only one camshaft (SOHC), for which the MIVEC design is more complicated than for the engine with 2 camshafts (DOHC), because the valves are controlled using intermediate shafts (rocker arms) mikedVSmiked.

For each cylinder, the valve mechanism contains:

• "low-profile cam" (low-lift) and a suitable rocker rocker for the 1st valve;
• "medium-profile cam" (medium-lift) and a certain rocker rocker for the 2nd valve;
• "high profile cam" (high-lift), located in the center between the middle and low cams;
• A T-arm that is integral with the "high profile cam".

Low RPM keeps the T-arm wing moving without any impact on the rockers; low profile and medium profile cams actuate the intake valves respectively. When the value reaches 3500 rpm, hydraulics (oil pressure) shift the pistons in the rocker arms, causing the T-arm to press on both rockers, and thus both valves come under the control of a high-profile cam.

What is MIVEC for?

From the very beginning, MIVEC was created in order to increase the specific power of the engine due to the following effects:
displacement increase = 1.0%;
acceleration of the supplied mixture = 2.5%;
exhaust resistance reduction = 1.5%;
valve lift adjustment = 8.0%

As a result, the power should increase by approximately 13%. But suddenly it turned out that MIVEC also saves fuel, improves economic performance and makes the engine more stable:
At low speeds, there is a reduction in fuel consumption due to the recirculation of already exhaust gases (EGR) and a low-enriched mixture. At the same time, Mitsubishi marketers claim that thanks to MIVEC, the mixture is leaner in terms of the fuel / air ratio by one more unit (up to 18.5) with the best efficiency indicators.
During a cold start, the system provides late ignition and a lean mixture, and the catalyst warms up faster.
To reduce low speed losses due to exhaust system drag, a dual exhaust manifold is used that includes a front catalytic converter. As a result, it was possible to reduce emissions by up to 75% by Japanese standards.

MIVEC technology is at least used in the following MMC engines: 3A91, 4A90, 3B20, 4A92, 4B10, 4A91, 4B11, 4G15, 4B12, 4G69, 4N13, 6B31, 4J10, 6G75, 4G92, 4G63T, 4G19, 6G72, 6G72, 6G72 .

Comparison of MIVEC, VTEC and VVT

MIVEC, Mitsubishi Innovative Valve timing Electronic Control system: Mitsubishi's electronic valve lift control, a variation of VVL and CVVL technologies. Does not include phase shift technology.

It was first introduced in 1992 on the 4G92 engine (16-valve 4-cylinder DOHC 1.6). The first cars equipped with this engine were the Mitsubishi Mirage hatch and the Mitsubishi Lancer sedan. MIVEC technology was also the first CVVL technology introduced for diesel engines in the passenger segment. A feature of MIVEC technology is the absence of phase rotation (phase shift).

MIVEC Principle

The MIVEC system ensures the operation of the engine valves in various modes (with different lift heights and degree of phase overlap), depending on the speed and with automatic switching between modes. In the basic version, the technology implied two modes (see the figure below), in the latest versions, continuous change is provided (control of both intake and exhaust)

The physical meaning of the technology is as follows:

At low revs, the difference in valve lift stabilizes combustion, helps reduce fuel consumption and emissions, and increases torque.

At high speeds, an increase in valve opening time and valve lift significantly increases the amount of intake and exhaust of the fuel-air mixture (allows the engine to “breathe deeply”).

MIVEC system design

Below is a single camshaft (SOHC) engine, the MIVEC design for which is more complicated than for a double camshaft (DOHC) engine, since mikedVSmiked intermediate shafts (rocker arms) are used to control the valves.

The valve mechanism for each cylinder includes:

"low-profile cam" (low-lift) and corresponding rocker rocker for one valve;

“medium-lift” cam and matching rocker arm for another valve;

"high-profile cam" (high-lift), which is centrally located between the low and medium cam;

A T-arm that is integral with the "high profile cam".

At low RPM, the T-arm wing moves without any impact on the rockers; the intake valves are respectively controlled by low and medium profile cams. At 3500 rpm, the pistons in the rocker arms are shifted hydraulically (oil pressure) so that the T-arm presses on both rockers and both valves are thus controlled by a high profile cam.

What is MIVEC for?

Initially, MIVEC was created to increase the specific power of the engine due to the following effects:

release resistance reduction = 1.5%;

mixture feed acceleration = 2.5%;

displacement increase = 1.0%;

valve lift control = 8.0%

The total increase in power should be about 13%. But it suddenly turned out that MIVEC also saves fuel, improves environmental performance and engine stability:

At low speeds, fuel consumption is reduced by a low-enrichment mixture and exhaust gas recirculation (EGR). At the same time, according to Mitsubishi marketers, MIVEC allows you to deplete the mixture in terms of the air / fuel ratio by one more unit (up to 18.5) with better efficiency indicators.

During a cold start, the system provides a lean mixture and later ignition, warms up the catalyst faster.

To reduce low rpm losses caused by exhaust system drag, a dual exhaust manifold including a front catalytic converter has been adopted. This made it possible to achieve emission reductions of up to 75% by Japanese standards.

MIVEC technology is included in at least the following MMC engines: 3A91, 3B20, 4A90, 4A91, 4A92, 4B10, 4B11, 4B12, 4G15, 4G69, 4J10, 4N13, 6B31, 6G75, 4G19, 4G92, 4G63T, 6G72, 6A12, 6A12 .

(Mitsubishi Innovative Valve timing Electronic Control system) - an electronic valve lift control system. This engine was developed by Mitsubishi and was first used in 1992 on cars and.

The technology immediately took a leading position in the ratings of economical cars, despite the fact that the engine did not lose its power. Drivers' ambitions are often at odds with fuel economy and emissions reduction, but MIVEC makes it possible to achieve these goals.

How MIVEC works

MIVEC system works with engine valves in a variety of modes. It changes their position depending on the number of revolutions. Mivek technology works according to the following meaning:

• When the engine is at low rpm, the combustion of the mixture becomes more stable, because the valves rise, which increases the torque;
• When the power unit is gaining high speed, more energy is spent to open the valves. This greatly increases the exhaust and intake volume of the fuel system;

What is MIVEC for?

First, the Japanese created engineMIVEC in order to increase the power of each of the following effects:

• Increase in working volume by 1.0%;
• Acceleration of the combustible mixture when applying by 2.5%;
• Reduced exhaust resistance by 1.5%;
• Valve lift adjustment by 8.0%;

As a result, power increased by 13%. Then the engineers found out that such a system allows well, which made the engine work more stable.

When the engine is gaining low speed, fuel consumption is reduced due to the fact that exhaust gas recirculation occurs. Marketers say that MIVEC contributes to the depletion of the mixture in relation to fuel to air up to 18.5%.

During a cold start, the system provides late ignition and a lean mixture, resulting in faster warming up of the catalyst. To reduce losses, a double exhaust manifold is used. This allows the election to be reduced by up to 75% in accordance with Japanese standards.

MIVEK video system

See how it works in the video below engineMIVEC. The video is recorded in English, so you can turn on subtitles and select Russian.

Mitsubishi Motors has developed a completely new engine system with an improved starting system and fuel-saving technology. This is a 4j10 MIVEC engine equipped with an innovative GDS phase electrical control system.

The birth of a new engine installation

ATTENTION! Found a completely simple way to reduce fuel consumption! Don't believe? An auto mechanic with 15 years of experience also did not believe until he tried it. And now he saves 35,000 rubles a year on gasoline!

The super engine is assembled at the SPP plant. Its implementation on the company's car models will be carried out sequentially. "Innovative technologies - new challenges," the company's administration officially announced, hinting that soon most of the new cars will be equipped with engines of this type. In the meantime, 4j10 MIVEC is provided only for Lancer and ACX.

Operation showed that cars began to consume 12 percent less fuel than before. This is a big success.

The impetus for the introduction of innovation was a special program, which is the main part of the main business plan of the corporation called "Jump 2013". According to it, MM plans to achieve not only a reduction in fuel consumption, but also an environmental improvement - up to 25% reduction in CO2 emissions. However, this is not the limit - the idea of ​​​​development of Mitsubishi Motors by 2020 implies a reduction in emissions by 50%.

As part of these tasks, the company is actively engaged in innovative technologies, implements them, and tests them. The process is ongoing. As far as possible, the number of cars equipped with a clean diesel engine is increasing. Improvements are also being made to gasoline engines. At the same time, MM is working on the introduction of electric cars and hybrids.

Engine Description

Now for 4j10 MIVEC in more detail. The volume of this engine is 1.8 liters, it has an all-aluminum block of 4 cylinders. The motor has 16 valves, there is only one camshaft - it is located in the upper part of the block.

The motor unit is equipped with a new generation of hydraulic distribution system, which continuously regulates the inlet valve lift, phase and time of its opening. Thanks to these innovations, stable combustion is ensured and friction between the piston and cylinders is reduced. In addition, this is an excellent option for saving fuel without losing traction.

The new 4j10 engine received a lot of feedback from Lancer and ACX car owners. We recommend that you study them before drawing conclusions regarding the advantages or disadvantages of the new motor.

Engine volume, cc	1798
Maximum power, hp	139
CO2 emissions, g/km	151 - 161
Cylinder diameter, mm	86
Add. engine information	Distributed injection ECI-MULTI
Fuel used	Gasoline Regular (AI-92, AI-95)
Number of valves per cylinder	4
Maximum power, hp (kW) at rpm	139 (102) / 6000
Maximum torque, N * m (kg * m) at rpm.	172 (18) / 4200
The mechanism for changing the volume of cylinders	No
Fuel consumption, l/100 km	5.9 - 6.9
Start-stop system	Yes
Compression ratio	10.7
engine's type	4-cylinder, SOHC
Piston stroke, mm	77.4

MIVEC Technology

The first time MM installed a new electrically controlled GDS phase system on engines was in 1992. This was done with the intention of increasing the performance of the internal combustion engine at any speed. The innovation was successful - since then the company began to implement the MIVEC system systematically. What has been achieved: real fuel savings and a reduction in CO2 emissions. But this is not the main thing. The motor did not lose its power, remained the same.

Note that until recently the company used two MIVEC systems:

• a system with the ability to increase the valve lift parameter and control the opening duration (this allows you to control according to a change in the speed of rotation of the internal combustion engine);
• a system that monitors regularly.

The 4j10 engine uses a completely new type of MIVEC system that combines the advantages of both systems.. This is a general mechanism that makes it possible to change the position of the height of the valve and the duration of its opening. At the same time, control is carried out regularly, at all stages of the operation of the internal combustion engine. The result is an optimal control over the operation of the valves, which automatically reduces the losses of a conventional pump.

The new advanced system can work effectively in engines with a single overhead camshaft, which allows to reduce the weight of the engine and its dimensions. The number of related parts is reduced to achieve compactness.

Auto stop&go

This is a system for automatically turning off the engine during short stops - when the car is standing under traffic lights. What does it give? Allows significant fuel savings. Today, Lancer and ACX cars are equipped with such a function - the result is beyond praise.

Both systems - Auto Stop & Go and MIVEC significantly increase the technical capabilities of the engine. It starts up faster, starts well, shows amazing smoothness in all modes. But the most important thing is that less fuel is consumed, both under normal driving conditions and during maneuvers, restarts, and overtaking. This is the merit of innovative technology - a low valve lift is maintained during the operation of the internal combustion engine. Thanks to the Auto Stop & Go system, braking forces are controlled during the shutdown of the engine system, which allows you to stop the car on slopes without worrying about its involuntary rolling.

A fly in the ointment

Japanese engines, however, like German ones, are famous for their high quality and reliability. They have become a kind of standard proclaiming the triumph of advanced technologies. The introduction of the new 4j10 is a clear proof of this.

Not only the newest installations produced by the MM corporation are popular, but also the old ones that are in demand. This is due to the fact that outside of Japan, the Mitsubishi concern cooperates with the best companies for the production of spare parts.

For the most part, Japanese-made motors are compact. This is due to the priority direction of the company, aimed at the production of small cars. Most of all in the line of 4-cylinder units.

However, unfortunately, the design of cars equipped with Japanese engines does not adapt well to the quality of Russian fuel (4j10 is no exception). Broken roads, which are still in large numbers in the vast country, also make their black contribution. In addition, our drivers do not drive carefully, they are used to saving on good (expensive) fuel and oil. All this makes itself felt - after a few years of operation, it becomes necessary to overhaul the engine, which cannot be called a low-cost procedure.

So, what prevents the correct operation of Japanese motor installations in the first place.

• Filling the system with inexpensive low quality oil kills the engine like a bullet fired from a machine gun. Attractive at first glance, savings have a detrimental effect on the technical characteristics of motors. First of all, poor-quality lubricant spoils the valve lifters, which quickly become clogged with waste products.
• Spark plug. For the smooth functioning of the engine, it is necessary to complete it exclusively with original elements. The use of cheap analogues easily leads to breakdown of armored wires. Therefore, regular updating of wiring with original components is a prerequisite.
• Injector clogging is also caused by the use of low-quality fuel.

If you own a Mitsubishi car equipped with a 4j10 engine, be on the lookout! Carry out a technical inspection in a timely manner, use only original and high-quality consumables.