Control method for engine of motor vehicle and engine

Abstract

The embodiment of the invention provides a control method for an engine of a motor vehicle and the engine and relates to the technical field of engines. The control method comprises the steps that a control device obtains a position variable quantity of a pedal; an opening degree is looked up, a reference list is set, and a target opening degree variable quantity of an electronic throttle valve is determined according to the obtained position variable quantity of the pedal; a target air inflow variable quantity of an air cylinder is determined according to the target opening degree variable quantity of the electronic throttle valve. According to the control method for the engine of the motor vehicle and the engine, the setting of the reference list through a preset opening degree, the reference list is directly called in use, the target opening degree variable quantity is directly looked up according to the collected pedal opening degree, so that a series of operations performed in the prior art according to the pedal opening degree variation are avoided, the control process of the engine is simplified, the requirement for hardware is reduced, and therefore the hardware cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of motor vehicle engines, in particular, to a method for controlling motor vehicle engines and the engine. Background technique [0002] The engine is a necessary component to drive a motor vehicle. Engine control mainly refers to the control of fuel injection volume, intake air volume and ignition advance angle, so that the engine can produce as much output power as possible with as little fuel consumption as possible; the exhaust gas generated by combustion meets the requirements of environmental protection regulations. [0003] At present, more control methods are used to obtain the load request value of the engine according to the opening degree of the pedal, determine the target torque to be output in combination with the current engine speed, determine the torque model according to the target torque, and then reversely calculate the current operating condition. The maximum torque, the correspo...

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Problems solved by technology

[0003] At present, more control methods are used to obtain the load request value of the engine according to the opening degree of the pedal, determine the target torque to be output in combination with the current engine speed, determine the torque model according to the target torque, and then reversely calculate the current operating condition. The maximum torque, the corresponding expected intake air volume, and the expected throttle opening are calculated according to the expected throttle opening, and the intake air efficiency, air-fuel ratio efficiency, and ignition efficiency are also calculated in the torque model. The process is complicated, the amount of calculation is huge, and the requirements for the hardware single-chip microcomputer are high, which leads to high cost

In addition, due to the large amount of control parameters, the calibration and matching work is difficult and the calibration time is long when the control system is applied.

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