CN102444443B - Intake and exhaust valve control method of internal combustion engine - Google Patents

Abstract

A method for controlling an intake valve and an exhaust valve of an internal combustion engine belongs to the fields of an intake system and an exhaust system of the internal combustion engine and braking. The control method provides two driving modes of high compression ratio and low expansion ratio or low compression ratio and high expansion ratio of the turbocharged internal combustion engine, a braking mode of a naturally aspirated internal combustion engine and a control method of an intake valve and an exhaust valve for realizing the modes. The dynamic property, the acceleration performance and the high-speed performance of the low-speed high-torque and plateau working conditions are improved simultaneously by combining a high-compression-ratio low-expansion-ratio mode for the low-speed high-torque, plateau environment and acceleration working conditions of the turbocharged internal combustion engine and a low-compression-ratio high-expansion-ratio circulation mode for the high-speed high-load working conditions. The internal combustion engine with 720 degrees per cycle is changed into the air compressor with 360 degrees per cycle by adopting a braking mode, the internal combustion engine is braked by replacing a vehicle auxiliary braking system, and the braking effect can be adjusted by adjusting the opening parameters of the air valves.

Description

Intake and exhaust valve control method of internal combustion engine

technical field

The invention relates to a method for controlling the intake and exhaust valves of an internal combustion engine, so as to realize two driving modes of a turbocharged internal combustion engine, high compression ratio and low expansion ratio or low compression ratio and high expansion ratio, and the braking of forward as forward and exhaust as exhaust Mode, the intake and exhaust valve events required by the braking mode of a naturally aspirated internal combustion engine, belongs to the field of intake and exhaust systems and braking of internal combustion engines.

Background technique

On the one hand, with the sharp increase in the number of internal combustion engines, the continuous rise of world oil prices, and the increasingly serious air pollution, the problem of how to effectively improve the efficiency of internal combustion engines and reduce emissions has become increasingly urgent. Turbocharged internal combustion engines have high efficiency and low emissions. advantage, the proportion is increasing. At present, the turbocharged internal combustion engine mainly has the following problems:

1) The thermal load of the turbine blades is too high at high speed and heavy load, the torque decreases seriously at low speed, the fuel consumption rate increases at low load, and the response of the intake boost pressure rises significantly worse under acceleration conditions, etc.

2) Under the plateau environment, the power performance becomes poor, the low-temperature start-up is slow, and the acceleration time is long. How to make the turbocharged internal combustion engine run well under the plateau environment has become a major problem that needs to be solved urgently.

3) When the intake pressure increases, the degree of influence of the valve opening and closing law on the intake and exhaust process of the internal combustion engine is greatly increased. Therefore, the development of the variable valve technology system and the research on its control method are very important.

On the other hand, with the sharp increase in the number of internal combustion engines, people pay more and more attention to vehicle safety, and more and more countries list auxiliary braking systems as one of the necessary accessories for vehicles. However, most of the current auxiliary braking systems have problems such as overheating of braking components, rapid reduction in braking efficiency, low controllability of braking efficiency, easy deviation of the vehicle during braking, and limited vehicle space occupied by the braking system.

Contents of the invention

The object of the present invention is to solve the problems in the above-mentioned internal combustion engine research field, and utilize a variable valve drive system to realize two driving modes of high compression ratio and low expansion ratio or low compression ratio and high expansion ratio on a turbocharged internal combustion engine, so as to achieve an overall increase in turbocharging. The low-speed high-torque working condition of the compressed internal combustion engine and the dynamic performance of the plateau working condition improve the startability, acceleration and high-speed performance; the variable valve drive system is used to realize different braking conditions on the naturally aspirated internal combustion engine and the turbocharged internal combustion engine. Braking mode, in order to achieve the purpose of changing the 720°/cycle internal combustion engine into a 360°/cycle compressor, replacing the vehicle auxiliary braking system to achieve internal combustion engine braking, and adjusting the opening parameters of the valve to achieve adjustable braking effects.

The technical solution adopted by the present invention to solve the technical problem is: a method for controlling the intake and exhaust valves of an internal combustion engine, using a variable intake valve system and a variable exhaust The first intake valve control signal of the variable intake valve system controls the opening timing of the intake valve fuel supply solenoid valve and the closing timing of the intake valve fuel drain solenoid valve to determine the opening of the intake valve Timing; the second intake valve control signal controls the opening duration of the intake valve oil supply solenoid valve to determine the lift of the intake valve; the third intake valve control signal controls the closing duration of the intake valve oil drain solenoid valve , determines the closing timing of the intake valve; the first exhaust valve control signal of the variable exhaust valve system controls the opening timing of the exhaust valve fuel supply solenoid valve and the closing timing of the exhaust valve drain solenoid valve , determines the opening timing of the exhaust valve; the second exhaust valve control signal controls the opening duration of the exhaust valve oil supply solenoid valve, and determines the lift of the exhaust valve; the third exhaust valve control signal controls the exhaust valve leakage The closing duration of the oil solenoid valve determines the closing timing of the exhaust valve; the fourth control signal controls the opening and closing state of the air valve between the intake pipe after the compressor and the exhaust pipe before the turbocharger; Under the low-speed and high-torque working conditions of the turbocharged internal combustion engine, plateau environment and acceleration working conditions, the cycle of high compression ratio and low expansion ratio is used for control, and the exhaust valve is opened in advance by controlling the intake and exhaust valve system, and the intake valve is opened in advance to increase The lift of the intake valve delays the closing of the intake valve; under the condition of high speed and heavy load of the turbocharged internal combustion engine, it adopts the cycle of low compression ratio and high expansion ratio to control, and delays the opening of the exhaust valve by controlling the intake and exhaust valve system. Open the intake valve, reduce the lift of the intake valve, close the intake valve in advance, and at the same time, open the valve between the intake pipe after the compressor and the exhaust pipe in front of the turbocharger; Open the exhaust valve, reduce the lift of the exhaust valve, close the exhaust valve in advance, open the intake valve in advance, increase the lift of the intake valve, and close the intake valve in advance; adjust the valve opening parameters according to the requirements of internal combustion engine braking, For the turbocharged internal combustion engine, the braking mode of intake as intake and exhaust as exhaust is adopted. By controlling the intake and exhaust valve system, the exhaust valve is opened and closed twice before and after the top dead center, and the intake valve is opened and closed near the bottom dead center. .

The naturally aspirated internal combustion engine adjusts the valve opening parameters according to the braking requirements. By controlling the intake and exhaust valve system, the intake valve or exhaust valve is opened and closed twice before and after the top dead center, and the intake valve or exhaust valve is opened and closed near the bottom dead center. exhaust valve.

Under the low-speed and high-torque working conditions of the turbocharged internal combustion engine, plateau operating conditions and acceleration working conditions, when the intake boosting degree of the turbocharger is lower than the intake boosting set value of the corresponding working conditions of the internal combustion engine, based on the high The thermodynamic cycle with a low compression ratio and a low expansion ratio adopts the following method: the electronic control unit reduces the opening timing of the exhaust valve oil supply solenoid valve and the closing timing of the exhaust valve oil drain solenoid valve by controlling the first exhaust valve control signal. The exhaust valve is opened in advance; the electronic control unit reduces the opening timing of the intake valve oil supply solenoid valve and the closing timing of the intake valve oil drain solenoid valve by controlling the first intake valve control signal, and opens the intake valve in advance. valve; by controlling the second intake valve control signal, the electronic control unit increases the opening duration of the intake valve oil supply solenoid valve and increases the lift of the intake valve; the electronic control unit controls the third intake valve control signal, Increase the closing duration of the intake valve drain solenoid valve to delay closing the intake valve.

Under the high-speed and high-load working conditions of the turbocharged internal combustion engine, when the intake pressure of the turbocharger is higher than the set value of the intake pressure for the corresponding working conditions of the internal combustion engine, based on the thermodynamic cycle with low compression ratio and high expansion ratio, the The following method: the electronic control unit controls the first exhaust valve control signal to increase the opening timing of the exhaust valve fuel supply solenoid valve and the closing timing of the exhaust valve drain solenoid valve, delaying the opening of the exhaust valve; the electronic control unit By controlling the first intake valve control signal, the opening timing of the intake valve fuel supply solenoid valve and the closing timing of the intake valve drain solenoid valve are reduced, and the intake valve is opened in advance; the electronic control unit controls the second intake valve The valve control signal reduces the opening duration of the intake valve oil supply solenoid valve and reduces the lift of the intake valve; the electronic control unit reduces the intake valve oil drain solenoid valve by controlling the third intake valve control signal The intake valve is closed in advance during the closing duration; at the same time, the electronic control unit controls the fourth control signal to open the air valve between the intake pipe after the compressor and the exhaust pipe before the turbocharger.

When the internal combustion engine is started under low-temperature ambient conditions, the electronic control unit increases the opening timing of the exhaust valve fuel supply solenoid valve and the closing timing of the exhaust valve drain solenoid valve by controlling the first exhaust valve control signal, delaying the opening of the exhaust valve. ;The electronic control unit reduces the opening duration of the exhaust valve drain solenoid valve by controlling the second exhaust valve control signal, and reduces the exhaust valve lift; the electronic control unit controls the third exhaust valve control signal, reduces The closing duration of the small exhaust valve oil drain solenoid valve closes the exhaust valve in advance; the electronic control unit reduces the opening timing of the intake valve fuel supply solenoid valve and the intake valve drain valve by controlling the first intake valve control signal. The closing timing of the oil solenoid valve opens the intake valve in advance; the electronic control unit increases the opening duration of the intake valve oil supply solenoid valve by controlling the second intake valve control signal, and increases the lift of the intake valve; By controlling the third intake valve control signal, the unit reduces the closing duration of the intake valve drain solenoid valve and closes the intake valve in advance; after starting, the internal combustion engine enters the acceleration stage, and the intake and exhaust valves are controlled according to the acceleration condition exercise.

When the turbocharged internal combustion engine brakes, the electronic control unit controls the first exhaust valve control signal to open the exhaust valve before top dead center; then the electronic control unit controls the second exhaust valve control signal and the third exhaust valve control signal. signal to close the exhaust valve before the top dead center; after the top dead center, the electronic control unit controls the first exhaust valve control signal again to open the exhaust valve; then the electronic control unit controls the second exhaust valve control signal and the second exhaust valve control signal 3 The exhaust valve control signal closes the exhaust valve; before the bottom dead center, the electronic control unit controls the first intake valve control signal to open the intake valve; after the bottom dead center, the electronic control unit controls the second intake valve control signal and the third intake valve control signal to close the intake valve.

When the naturally aspirated internal combustion engine brakes, the electronic control unit controls the first intake valve control signal or the first exhaust valve control signal to open the intake valve or exhaust valve before top dead center; then the electronic control unit controls the second The intake valve control signal and the third intake valve control signal, or the second exhaust valve control signal and the third exhaust valve control signal, close the intake valve or exhaust valve before the top dead center; after the top dead center The electronic control unit again controls the first intake valve control signal or the first exhaust valve control signal to open the intake valve or exhaust valve; then the electronic control unit controls the second intake valve control signal and the third intake valve control signal , or the second exhaust valve control signal and the third exhaust valve control signal, close the intake valve or exhaust valve after the top dead center; before the bottom dead center, the electronic control unit controls the first exhaust valve control signal or the first exhaust valve control signal 1 intake valve control signal, open the exhaust valve or intake valve; after the bottom dead center, the electronic control unit controls the 2nd exhaust valve control signal and the 3rd exhaust valve control signal, or the 2nd intake valve control signal and the The third intake valve control signal closes the exhaust valve or intake valve.

The beneficial effects of the present invention are: (a) for the turbocharged internal combustion engine in the drive mode, under low-speed high-torque operating conditions, plateau operating conditions and acceleration operating conditions, a thermodynamic cycle with high compression ratio and low expansion ratio is adopted, through Open the exhaust valve in advance to increase the energy input to the turbine, and increase the opening face value of the intake valve and reduce the scavenging degree of the intake and exhaust valves to increase the amount of fresh air left in the cylinder; under high-speed and heavy-load conditions , using a thermodynamic cycle with a low compression ratio and a high expansion ratio, the energy input to the turbine is reduced by delaying the opening of the exhaust valve, and at the same time, by opening the air intake pipe between the intake pipe after the compressor and the exhaust pipe before the turbocharger valve to realize the cooling of the vortex blades directly by the cold intake air; at the time of cold start, by delaying the opening of the exhaust valve, reducing the lift of the exhaust valve, and closing the exhaust valve in advance to retain the hot gas in the cylinder to achieve rapid increase At the same time, by opening the intake valve in advance, increasing the lift of the intake valve, and closing the intake valve in advance to increase the intake air volume, the combination of the two can achieve the purpose of quick start. The above control method greatly improves the dynamic performance of the internal combustion engine in low-speed, high-torque conditions and plateau conditions, improves startability and acceleration, and reduces the thermal load of the internal combustion engine under high-speed and high-load conditions, so that turbocharging technology can not only fully realize it. It has the advantages of improving the power and economy of the internal combustion engine, reducing the emission of harmful gases, and can well solve the problems that traditional turbochargers cannot take into account high and low speeds, and poor transient response. (b) For the naturally aspirated internal combustion engine and the turbocharged internal combustion engine in the braking mode, adopt different braking modes respectively, and change the 720°/cycle internal combustion engine into a 360°/cycle compressor to replace the auxiliary braking of the vehicle System to achieve internal combustion engine braking, and adjust the opening parameters of the valve can adjust the effect of braking.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of an internal combustion engine intake and exhaust valve control method.

Figure 2 is a schematic diagram of the variable intake valve system.

In the figure: 1. Common rail pipe, 2. Oil delivery equipment, 3. Fuel tank, 4. Intake valve, 5. Intake valve spring, 6. Intake valve driving piston, 7. Intake valve driving oil cavity, 8 .Intake valve fuel supply solenoid valve, 9. Intake valve oil drain solenoid valve, 10. Exhaust valve, 11. Exhaust valve spring, 12. Exhaust valve driving piston, 13. Exhaust valve driving oil cavity, 14 . Exhaust valve oil supply solenoid valve, 15. Exhaust valve oil drain solenoid valve.

Detailed ways

Fig. 1 is a schematic diagram of an internal combustion engine intake and exhaust valve control method. The specific control method is as follows: through the real-time detection of internal combustion engine performance parameters (mainly the internal combustion engine speed signal, clutch position signal, accelerator pedal position signal, brake pedal position signal, etc.), it is judged whether the current internal combustion engine operating condition is the driving mode or the braking mode. model. The valve control method of the invention is based on the opening and closing parameters of the intake and exhaust valves of the turbocharged internal combustion engine adopting the variable intake valve system.

(1) If it is the drive mode, first judge whether it is in the start-up condition, and then for the turbocharged internal combustion engine, continue to judge whether the current operating condition is in the low-speed and high-load condition or the high-speed and high-load condition.

(a) If the current working condition is the starting working condition, the electronic control unit increases the opening timing of the exhaust valve fuel supply solenoid valve 14 and the closing of the exhaust valve drain solenoid valve 15 by controlling the first exhaust valve control signal Timing delays the opening of the exhaust valve 10; the electronic control unit reduces the opening duration of the exhaust valve drain solenoid valve 14 and reduces the lift of the exhaust valve 10 by controlling the second exhaust valve control signal; the electronic control unit By controlling the third exhaust valve control signal, the closing duration of the exhaust valve drain solenoid valve 15 is reduced, and the exhaust valve 10 is closed in advance; the electronic control unit is controlled by the first intake valve control signal, reducing the intake valve The opening timing of the fuel supply solenoid valve 8 and the closing timing of the intake valve drain solenoid valve 9 open the intake valve 4 in advance; the electronic control unit increases the intake valve fuel supply solenoid valve by controlling the second intake valve control signal. The opening duration of the valve 8 increases the lift of the intake valve 4; the electronic control unit reduces the closing duration of the intake valve drain solenoid valve 9 by controlling the third intake valve control signal, and closes the intake valve 4 in advance; After starting, the internal combustion engine enters the acceleration stage, and the movement of the intake and exhaust valves is controlled according to the acceleration condition.

(b) If the current working condition is in the low-speed and high-torque working condition of the turbocharged internal combustion engine or the accelerating working condition, then judge whether the intake boosting degree of the turbocharger is lower than the intake boosting set value of the corresponding working condition of the internal combustion engine , if yes, adopt the following control method: the electronic control unit reduces the opening timing of the exhaust valve oil supply solenoid valve 14 and the closing timing of the exhaust valve oil drain solenoid valve 15 by controlling the first exhaust valve control signal , to open the exhaust valve 10 in advance; the electronic control unit reduces the opening timing of the intake valve oil supply solenoid valve 8 and the closing timing of the intake valve oil drain solenoid valve 9 by controlling the first intake valve control signal, so as to advance Open the intake valve 4; the electronic control unit increases the opening duration of the intake valve oil supply solenoid valve 8 by controlling the second intake valve control signal, and increases the lift of the intake valve 4; the electronic control unit controls the third intake valve The valve control signal increases the closing duration of the intake valve drain solenoid valve 9 and delays the closing of the intake valve 4 .

(c) If the current working condition is in the high-speed and high-load working condition of the turbocharged internal combustion engine, then judge whether the intake pressure of the turbocharger is higher than the set value of the intake pressure for the corresponding working condition of the internal combustion engine, and if so, use The following control method: the electronic control unit controls the first exhaust valve control signal, increases the opening timing of the exhaust valve fuel supply solenoid valve 14 and the closing timing of the exhaust valve drain solenoid valve 15, and delays the opening of the exhaust valve 10 ; The electronic control unit reduces the opening timing of the intake valve fuel supply solenoid valve 8 and the closing timing of the intake valve drain solenoid valve 9 by controlling the first intake valve control signal, and opens the intake valve 4 in advance; The control unit reduces the opening duration of the intake valve oil supply solenoid valve 8 by controlling the second intake valve control signal, and reduces the lift of the intake valve 4; the electronic control unit controls the third intake valve control signal, Reduce the closing duration of the intake valve drain solenoid valve 9, and close the intake valve 4 in advance; at the same time, the electronic control unit controls the fourth control signal to open the intake pipe behind the compressor and the exhaust pipe before the turbocharger between air valves.

(d) If the current working condition is not in any of the above-mentioned working conditions or other working conditions or is in one of the above-mentioned working conditions, but the second judgment is "No", according to the requirements of the working conditions, the initial control of the intake and exhaust valves Fine-tuning around the state.

(2) If it is in braking mode, the following control is performed:

(a) For naturally aspirated internal combustion engine braking, the electronic control unit controls the first intake valve control signal or the first exhaust valve control signal to open the intake valve 4 or exhaust valve 10 before top dead center; The control unit controls the 2nd intake valve control signal and the 3rd intake valve control signal, or the 2nd exhaust valve control signal and the 3rd exhaust valve control signal, closes the intake valve 4 or the exhaust valve before the top dead center 10. After the top dead center, the electronic control unit controls the first intake valve control signal or the first exhaust valve control signal again to open the intake valve 4 or exhaust valve 10; then the electronic control unit controls the second intake valve control signal signal and the third intake valve control signal, or the second exhaust valve control signal and the third exhaust valve control signal, close the intake valve 4 or exhaust valve 10 after the top dead center; before the bottom dead center, the electronic control unit By controlling the first exhaust valve control signal or the first intake valve control signal, the exhaust valve 10 or the intake valve 4 is opened; after the bottom dead center, the electronic control unit controls the second exhaust valve control signal and the third exhaust valve The valve control signal, or the second intake valve control signal and the third intake valve control signal, close the exhaust valve 10 or the intake valve 4 . Adjust the control parameters of the intake and exhaust valves according to the braking requirements of the internal combustion engine.

(b) For a turbocharged internal combustion engine, before top dead center, the electronic control unit controls the first exhaust valve control signal to open the exhaust valve 10; then the electronic control unit controls the second exhaust valve control signal and the third exhaust valve control signal. door control signal, close the exhaust valve 10 before the top dead center; after the top dead center, the electronic control unit controls the first exhaust valve control signal again, and opens the exhaust valve 10; then the electronic control unit controls the second exhaust valve control signal and the third exhaust valve control signal to close the exhaust valve 10; before the bottom dead center, the electronic control unit controls the first intake valve control signal to open the intake valve 4; after the bottom dead center, the electronic control unit controls the first intake valve 2 intake valve control signal and the 3rd intake valve control signal, close the intake valve 4; adjust the control parameters of the intake and exhaust valves according to the braking requirements of the internal combustion engine.

The adjustment amount of the intake and exhaust valve control signals is calculated according to control algorithms such as fuzzy PID.

Figure 2 shows a schematic diagram of the variable intake valve system. The working process of the intake valve is:

(a) Intake valve opening stage: When the first intake valve control signal from the electronic control unit arrives, the intake valve fuel supply solenoid valve 8 is excited to open, the intake valve drain solenoid valve 9 is excited to close, and the common rail The hydraulic oil with a certain pressure in the pipe 1 enters the intake valve driving oil chamber 7 through the intake valve oil supply solenoid valve 8, overcomes the force of the intake valve spring 5, and drives the intake valve driving piston 6 to go down, and the intake valve 4 on.

(b) The stage of maintaining the maximum lift of the intake valve: when the second intake valve control signal of the electronic control unit arrives, the intake valve fuel supply solenoid valve 8 is not activated, and returns to the closed state, and the intake valve drain solenoid valve 9 continues to be energized to close, the hydraulic oil in the intake valve drive oil chamber 7 is blocked, and the intake valve remains at the maximum lift.

(c) Intake valve closing stage: When the third intake valve control signal of the electronic control unit arrives, the intake valve oil supply solenoid valve 8 continues to be deactivated and remains closed, and the intake valve oil drain solenoid valve 9 is not activated. After being excited, it returns to the open state. Under the action of the intake valve spring 5, the hydraulic oil in the intake valve drive oil chamber 7 enters the oil tank 3 through the intake valve drain solenoid valve 9, and the intake valve drive piston 6 moves upward. Intake valve 4 is closed.

Since the working process of the exhaust valve is the same as that of the intake valve, it will not be repeated here.

Claims (5)

1. internal combustion engine air-exhausting air-entering door control method, inlet and exhaust valve to turbocharging internal-combustion engines adopts variable air inlet door system and variable exhaust door system to control, the 1st intake valve control signal of described variable air inlet door system is controlled intake valve for the timing of closing of the unlatching timing of solenoid (8) and intake valve draining solenoid valve (9), determines the unlatching timing of intake valve (4); The 2nd intake valve control signal is controlled intake valve for the unlatching duration of solenoid (8), determines the lift of intake valve (4); The 3rd intake valve control signal is controlled closing the duration of intake valve draining solenoid valve (9), determines the timing of closing of intake valve (4); The 1st exhaust valve control signal of described variable exhaust door system is controlled exhaust valve for the timing of closing of the unlatching timing of solenoid (14) and exhaust valve draining solenoid valve (15), determines the unlatching timing of exhaust valve (10); The 2nd exhaust valve control signal is controlled exhaust valve for the unlatching duration of solenoid (14), determines the lift of exhaust valve (10); The 3rd exhaust valve control signal is controlled closing the duration of exhaust valve draining solenoid valve (15), determines the timing of closing of exhaust valve (10); The 4th control signal is controlled at the open/close states of the air valve between outlet pipe before suction tude after compressor and turbosupercharger; It is characterized in that: under turbocharging internal-combustion engines low-speed big operating mode, altitude environment and accelerating mode, adopt high compression ratio low bulk ratio to loop control, system opens exhaust valve (10) in advance by the control inlet and exhaust valve, open in advance intake valve (4), increase intake valve (4) lift, postpone and close intake valve (4); Under turbocharging internal-combustion engines high speed high load working condition, adopt the low compression ratio high expansion ratio to loop control, unlatching exhaust valve (10) is postponed by system by the control inlet and exhaust valve, open in advance intake valve (4), reduce intake valve (4) lift, close in advance intake valve (4), simultaneously, open suction tude after compressor and the air valve between the outlet pipe before turbosupercharger; When cold start-up, postpone and open exhaust valve (10), reduce exhaust valve (10) lift, close in advance exhaust valve (10), open in advance intake valve (4), increase intake valve (4) lift, close in advance intake valve (4); The valve opening parameter is regulated in requirement according to the internal-combustion engine braking, to turbocharging internal-combustion engines adopt into for advance-take row as row braking mode, by control inlet and exhaust valve system, twice keying exhaust valve (10), open and close intake valve (4) near lower dead center after budc.

2. internal combustion engine air-exhausting air-entering door control method according to claim 1, it is characterized in that: in described turbocharging internal-combustion engines low-speed big operating mode, under plateau operating conditions and accelerating mode, when the air intake pressurized degree of turbosupercharger during lower than the air intake pressurized setting value of the corresponding operating mode of internal-combustion engine, based on the thermodynamic cycle of high compression ratio low bulk ratio, in the following ways: ECU (Electrical Control Unit) is by controlling the 1st exhaust valve control signal, reduce exhaust valve and close timing for the unlatching timing of solenoid (14) and exhaust valve draining solenoid valve (15), open in advance exhaust valve (10), ECU (Electrical Control Unit) is by controlling the 1st intake valve control signal, reduces intake valve for the timing of closing of the unlatching timing of solenoid (8) and intake valve draining solenoid valve (9), opens in advance intake valve (4), ECU (Electrical Control Unit) increases intake valve for the unlatching duration of solenoid (8) by controlling the 2nd intake valve control signal, increases the lift of intake valve (4), ECU (Electrical Control Unit) increases closing the duration of intake valve draining solenoid valve (9) by controlling the 3rd intake valve control signal, postpones and closes intake valve (4).

3. internal combustion engine air-exhausting air-entering door control method according to claim 1, it is characterized in that: under described turbocharging internal-combustion engines high speed high load working condition, when turbosupercharger air intake pressurized degree during higher than the air intake pressurized setting value of the corresponding operating mode of internal-combustion engine, based on the thermodynamic cycle of low compression ratio high expansion ratio, in the following ways: ECU (Electrical Control Unit) is by controlling the 1st exhaust valve control signal, increase exhaust valve for the timing of closing of the unlatching timing of solenoid (14) and exhaust valve draining solenoid valve (15), postpone and open exhaust valve (10); ECU (Electrical Control Unit) is by controlling the 1st intake valve control signal, reduces intake valve for the timing of closing of the unlatching timing of solenoid (8) and intake valve draining solenoid valve (9), opens in advance intake valve (4); ECU (Electrical Control Unit) reduces intake valve for the unlatching duration of solenoid (8) by controlling the 2nd intake valve control signal, reduces the lift of intake valve (4); ECU (Electrical Control Unit) reduces closing the duration of intake valve draining solenoid valve (9) by controlling the 3rd intake valve control signal, closes in advance intake valve (4); Simultaneously, ECU (Electrical Control Unit) is controlled the 4th control signal and is opened suction tude after compressor and the air valve between the outlet pipe before turbosupercharger.

4. internal combustion engine air-exhausting air-entering door control method according to claim 1, it is characterized in that: when described turbocharging internal-combustion engines cold environmental conditions starts, ECU (Electrical Control Unit) is by controlling the 1st exhaust valve control signal, increase exhaust valve for the timing of closing of the unlatching timing of solenoid (14) and exhaust valve draining solenoid valve (15), postpone and open exhaust valve (10); ECU (Electrical Control Unit) reduces the unlatching duration of exhaust valve draining solenoid valve (14) by controlling the 2nd exhaust valve control signal, reduces exhaust valve (10) lift; ECU (Electrical Control Unit) reduces closing the duration of exhaust valve draining solenoid valve (15) by controlling the 3rd exhaust valve control signal, closes in advance exhaust valve (10); ECU (Electrical Control Unit) is by controlling the 1st intake valve control signal, reduces intake valve for the timing of closing of the unlatching timing of solenoid (8) and intake valve draining solenoid valve (9), opens in advance intake valve (4); ECU (Electrical Control Unit) increases intake valve for the unlatching duration of solenoid (8) by controlling the 2nd intake valve control signal, increases the lift of intake valve (4); ECU (Electrical Control Unit) reduces closing the duration of intake valve draining solenoid valve (9) by controlling the 3rd intake valve control signal, closes in advance intake valve (4); After startup, internal-combustion engine enters boost phase, controls the motion of inlet and exhaust valve according to accelerating mode.

5. internal combustion engine air-exhausting air-entering door control method desired according to right 1, is characterized in that: when described turbocharging internal-combustion engines braking, by controlling the 1st exhaust valve control signal, open exhaust valve (10) in the budc ECU (Electrical Control Unit); ECU (Electrical Control Unit) is controlled the 2nd exhaust valve control signal and the 3rd exhaust valve control signal subsequently, closes exhaust valve (10) in budc; After Top Center ECU (Electrical Control Unit) is controlled the 1st exhaust valve control signal again, opens exhaust valve (10); ECU (Electrical Control Unit) by controlling the 2nd exhaust valve control signal and the 3rd exhaust valve control signal, is closed exhaust valve (10) subsequently; ECU (Electrical Control Unit) by controlling the 1st intake valve control signal, is opened intake valve (4) Before Bottom Dead Center; By controlling the 2nd intake valve control signal and the 3rd intake valve control signal, close intake valve (4) in ECU (Electrical Control Unit) after bottom dead center.

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