Anti-impact control method for power transmission system of gasoline engine

A technology of power transmission system and control method, which is applied in the direction of automatic control, automatic control, engine control, etc., and can solve the problems affecting the reliability and life of the vehicle, the torsional vibration of the power system, the increase of torsional amplitude, etc.

Active Publication Date: 2020-11-17
DONGFENG MOTOR CORP HUBEI
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AI Technical Summary

Problems solved by technology

When the vehicle is running, the transmission system will form an impact force due to the sudden change of the output torque of the flywheel end, which may cause torsional vibration in the power system, or even resonance phenomenon. When the power system resonates, it will amplify the excitation and twist The amplitude of the vibration increases, resulting in fatigue damage to the components of the transmission system, affecting the reliability and life of the vehicle

Method used

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  • Anti-impact control method for power transmission system of gasoline engine
  • Anti-impact control method for power transmission system of gasoline engine
  • Anti-impact control method for power transmission system of gasoline engine

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings to facilitate a clearer understanding of the present invention, but they do not limit the present invention.

[0064] Such as figure 1 As shown, a gasoline engine power transmission system anti-shock control method,

[0065] First determine the conditions for the activation of the anti-shock control, and activate the anti-shock control when the following six conditions are met at the same time. This is mainly to eliminate the instability of the transmission system that may be caused by the combustion of the engine itself, or this working condition will not affect the impact on the transmission system, and avoid misadjustment of the torque vibration of the transmission system.

[0066] 1) No external longitudinal torque request, such as ABS, EPB, ESC, ESP, ESC, APA, ADAS;

[0067] 2) The engine is running and exceeds the set time;

[0068] 3) The water tempera...

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Abstract

The invention discloses an anti-impact control method for a power transmission system of a gasoline engine. The anti-impact control method is characterized by comprising the following steps of (1) acquiring an actual engine speed and a target engine speed, and thus obtaining an engine speed difference; (2) carrying out primary differentiation or secondary differentiation on the engine speed difference, then carrying out filtering processing, and thus obtaining an anti-impact torque filtering value; (3) obtaining an anti-impact torque initial value according to the anti-impact torque filteringvalue; and (4) comparing the anti-impact torque initial value with an anti-impact torque threshold value, and determining a fire path compensation torque, a gas path compensation torque and an oil supply state. The fire path compensation torque, the gas path compensation torque and the oil supply state are determined according to different gears and operation parameters, the fire path output torque and the gas path output torque of the engine are compensated, and torsional vibration and resonance of a power system and a transmission system are avoided.

Description

technical field [0001] The invention relates to the technical field of power system control, in particular to an anti-shock control method for a gasoline engine power transmission system. Background technique [0002] The engine generates power after combustion, and the power is transmitted to the driving wheels through the transmission system, and these parts of the transmission system with inertia and elasticity form a torque vibration system. When the vehicle is running, the transmission system will form an impact force due to the sudden change of the output torque of the flywheel end, which may cause torsional vibration in the power system, or even resonance phenomenon. When the power system resonates, it will amplify the excitation and twist The amplitude of the vibration increases, resulting in fatigue damage to the components of the transmission system, which affects the reliability and life of the vehicle. Contents of the invention [0003] The purpose of the pres...

Claims

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Application Information

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IPC IPC(8): F02D37/02F02D41/00F02D41/12F02P5/15
CPCF02D37/02F02D41/0002F02D41/0097F02D41/123F02D2200/101F02D2250/18F02P5/1502
Inventor 秦龙刘磊陈龙翟刚
Owner DONGFENG MOTOR CORP HUBEI
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