Инструкция по эксплуатации к двигателю 4G64 S4M (english)

Contents

Chapter 1 Main Technical Characteristics of 4G64 S4 Engine

1.  Products Summary of 4G64 S4 Engine

Shenyang Aerospace Mitsubishi Motors Engine Manufacturing Co.,Ltd is specialized in producing engine of 4G6 series. The company was set up as five investors of three countries, such as China, Japan and Malaysia invested 2.2 billion Yuan. At present, the petrol engines of 4G6 series possess the characteristics of large power, high torque moment, low fuel consumption, advanced structure, low shaking, low noise and low discharging. Its advanced technology is completely introduced from Japan Mitsubishi Company and it has gasoline of the 1990s internationally advanced stage. Its products are at the leading position among the domestic similar products. At present, the volume product-multi point injection (MPI) of two series 4G63S4 and 4G64S4 has been put in the market. It can be applied to the following car types, including car (Zhonghua Brand), SUV (LEOPARD series), light bus (DELICA, FREECA, HAISE, FENGXING and JMC TRANSIT). Now, there are MPV car and pickup car being developed and embarked on trial. 4G64 S4 Engine embarked by JMC TRANSIT is 4 cylinder gasoline engine whose output volume is 2.4 liters. Its electric fuel jet system adopts the products from th§ famous Engine Management System Co., Ltd of Delphi Co, Ltd.. The successful development of this product is the perfect combination of Japan Mitsubishi Technology and the advanced engine management system of Delphi Company.

2.  Technical Characteristics of 4G64 S4 Engine Products

The forms of 4G64 S4 Engine include 4 lengths of stroke, 4 air cylinder, wattr cooling, series, single overhead camshaft and gasoline engine.

the output volume of 4G64 S4 Engine is 2.4 liters (Actually it is 2.351 Uteri), The specific meaning of each number of 4G64 S4 is as follows:

2.1 Technical Characteristics

(a) High Performance

1)   High Compression Ratio

The firebox shape of 4G64 S4 Engine is roof-top firebox with ignition plug at the center of the firebox. The compression ratio of engine is 9.5. The higher compression ratio makes 4G64 S4 Engine have better dynamic quality.

2)   High Charge Efficiency

4G64 S4 Engine has 16 air valve totally with each 8 induction and exhaust valves. Four air valves of each cylinder are respectively 2 induction valves and 2 exhaust valves. Since the induction and exhaust manifold are at two sides of the air cylinder block, which forms crossflow in the firebox and improves the charge efficiency.

3) High Rotation Rate

The highest rotation rate of 4G64 S4 Engine can reach 6500-6800 rpm, with the rotation rate of the largest wer point is 5250 rpm. Since the overhead camshaft is adopted, it can make the camshaft directly drive the rocker to bring along the turnon of the induction and exhaust valves. Then, it can reduce the inertia mass of the operated valve serial, improve its overall stiffness and make the engine work reliably under the high rotation rate.

(b) Low Shaking, Low Noise

1) Reducing of the whirling vibration up and down

Balance Mechanism: Two balance shafts arranged at the cylinder block rotate at a speed two times higher than the rotation rate of the crankshaft, which can effectively reduce the shaking during the engine's rotation at the vertical and rotating directions and make the car operation quieter and make the passengers more comfortable.

2) Improvement of Rigidity

■ Overalf-type Bearing Cover: The usage of overall-type bearing cover of light weight and high rigidity can effectively reinforce the stiffness of the crankshaft bearing, solve the shortage of poor working condition of separate-type bearing cover and reduce distortional deformation of the cylinder body caused by the alternating motion of forcer and the explosion pressure of burning. Meanwhile, it can also debase the noise caused by the distortional deformation to make sure the engine can work stably and quietly under the operating mode of high power and large torque.

Main bearing cover

Crankshaft: It is forged in accordance with the standards of Japan Mitsubishi materials. Through the strict surface peening, the crankshaft can have better rigidity and wear resistance. 8 balance blocks of the crankshaft can effectively meet the requirements of dynamic poise of the crankshaft, and then it can reduce the burden of the crankshaft bearing as well as the shaking and noise of the engine.

Crankshaft

3) Reducing of the torsional vibration of the crankshaft

Vibration-reduced belt sheave of the crankshaft: The vibration-reduced belt sheave of the crankshaft is an important characteristic of Shenyang Aerospace Mitsubishi Motors Engine. The test results of the distortional vibration reducing towards the vibration-reduced belt sheave of the crankshaft on the complete machine can determine the fixed vibration frequency of the vibration-reduced belt sheave of the crankshaft. Through the advanced manufacturing technics, control the amplitude of fluctuation of the fixed vibration frequency. Meanwhile, using the precise experimental equipments to test strictly to make sure stability of the fixed vibration frequency of the vibration-reduced belt sheave of the crankshaft. Thus, it can effectively reduce the torsional vibration of crankshaft system, which can make the crankshaft work reliably under any operating modes and reduce the shaking and noise of the engine in the maximum limit.

4) Other noise and shaking-reduced Mechanism

Automatically Adjusting Mechanism of the valve: As a result of the usage of the hydraulic lifter, the valve clearance needs not to be modulated manually and the hydraulic lifter can absorb the valve clearance caused by the environmental temperature shift and parts abrasion, which can keep the valve clearance zero and largely reduce the noise of the valve system.

Timing Cingulum and the Automatic Tightener; Timing cingulum wheel of crankshaft is depended on the driving camshaft of the timing cingulum and oil pump. Its characteristics are non-distortion, low noise, light weight and no need to be lubricated. It used rubber as the basic material with one layer fiber glass inside to make sure the timing cingulum will not shrink or expand. Use the automatic tightener to make sure the timing belt can keep tensioning under any conditions. This mechanism can modulate automatically as the change of the environmental temperature and the burden. Thus, it can debase the noise when the engine is operating and improve the durability of the timing cingulum.

(c) Reducing Abrasion Loss

Bearing-type Rocker Arm with Roller Pin: The rocker arm uses rolling and scrubbing cooperation by the roller with roller pin bearing and cam. Compared with the traditional sliding rocker arm , it can reduce half of the driving force moment of the camshaft and then improve the performance and fuel economy of the engine.

(d) Improving Dependability

1) Valve Spring:

As the height of the valve height is limited and it should endure some extent compressure, then the valve spring is required to have enough amount of compression to prevent the valve falling from the valve guide. The usage of special cross-section spring of non-cross symmetrical shape from Japan Mitsubishi Company can make sure the valve spring works under the hot environment durably and distinctly improve the fatigue and lasting quality.

Cross-section shape

2) Endurance

450 Hours of Fatigue and Endurance Test: Before each part of 4G64 S4 Engine Is nationalized, the endurance assessment criterion of the engine produced by Japan Mitsubishi Company should be strictly executed. After cruel 450 hours experimental test of fatigue and endurance, reliable and fine quality of 4G64 S4 Engine can be ensured.

(e) Fine Discharging

In order to adapt Euro- II, 4G64 S4 Engine adopts several advanced technologies, including hot-wire type oxygen sensor, fuel-evaporated recovery system controlled by the electron and crankcase of positive ventilation system.

1)    Usage of Hot-wire Type Oxygen Sensor

The hot-wire type oxygen sensor means that thee is a electrical heating element in the oxygen sensor, which can heat up the oxygen sensor to the working temperature after the engine starts and make the discharging more advantageous.

2)    Usage of Fuel-evaporated Recovery System Controlled by the Electron

The fuel-evaporated recovery system controlled by the electron include vapor recovery tank (charcoal tank), purify controlling magnet valve, vapor separating valve, corresponding steam line and vacuum hose. When the engine is operating, if the magnet valve starts, then under the effect of the pull of vacuum inside the intake manifold, the air will enter the lower part of the charcoal tank, then through the active carbon, it gets out of the upper part to enter the intake manifold of the engine through soft tube. It makes the gasoline molecule absorbed in the active carbon surface evaporate again and it will be inhaled with the air to the engine cylinder to be burnt. The gasoline vapor amount reclaimed into the intake manifold should be controlled to prevent destroying the normal gas mixture components. This controlling course can be carried out by the electronic controlling units (ECU), which control the turnon of the purifying magnet valve. If the engine stops or operates at a idle speed, the electronic controlling units (ECU) can close the purifying magnet valve, and the gasoline vapor evaporated from the gasoline tank will be inhaled by the charcoal tank. If the engine operates at a quick speed, the electronic controlling units (ECU) opens the purifying magnet valve and the gasoline vapor stored in the charcoal tank will be inhaled into the engine to be burnt through the soft tube.

3)    Usage of Crankcase of Positive Ventilation Devices

The work of crankcase of positive ventilation system is controlled by the positive ventilation crankshaft valve (P.V.C. valve). It can introduce the exhaust gas inhaled into the crankcase

into the cylinder to be burnt again. The exhaust gas flow controlled by the P.V.C valve will be different as the degree of vacuum inhaled into the intake manifold are different.

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