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Diesel engine control method and system

A diesel engine and control method technology, applied in engine control, machine/engine, electrical control, etc., can solve problems such as unstable air volume control, smoke emission, and complex design and implementation, and achieve the goal of improving NVH performance and reducing speed fluctuations Effect

Active Publication Date: 2018-01-09
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control logic design needs to be designed for two actuators. The design and implementation are more complicated, and if the two actuators are not properly calibrated and matched, interference will easily occur, the air volume control will be unstable, and exhaust gas will be introduced under idling conditions, which will easily cause the engine to stall. , shaking, smoking, etc.
[0005] For the above technical problems, there is no good solution in the prior art

Method used

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  • Diesel engine control method and system

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Embodiment Construction

[0059] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0060] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0061] figure 1 It is a flowchart of a diesel engine control method described in an embodiment of the present invention. Such as figure 1 As shown, a diesel engine control method provided in an embodiment of the present invention may include:

[0062] Step S10, judging the idling speed of the diesel engine; and

[0063] Step S11 , when the diesel engine is idling, the throttle opening is set to a first preset value smaller than the current opening value.

[0064]When the diesel engine is idling, due to the high diesel explosion pressure, when the throttle valve is opened too small, it is prone to rough combustion. And if the throttle opening is too large at idle speed, it will lead ...

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Abstract

The invention relates to the technical field of engine control and provides a diesel engine control method and system. The diesel engine control method comprises the steps that the idle speed of a diesel engine is judged; and when the diesel engine is at the idle speed, the opening degree of a throttle valve is set to be a first preset value smaller than the current opening degree. According to the diesel engine control method, when the diesel engine is at the idle speed, the opening degree of the throttle valve is set to be a small value, and therefore the NVH performance of the idle speed condition of a diesel engine vehicle can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of engine control, in particular to a diesel engine control method and system. Background technique [0002] As the power source of the vehicle, the diesel engine has high torque, low fuel consumption, and CO 2 The emission is about 30% lower than that of gasoline engines, and it is widely used in the field of commercial vehicles and European passenger vehicles. But at the same time, due to the high explosion pressure, the diesel engine has the disadvantages of rough combustion, poor noise, vibration and harshness (Noise, Vibration, Harshness, NVH), and the comfort of the vehicle is greatly reduced, especially under the condition of idling on the spot. This also severely restricts the promotion of diesel engines as a power source for passenger cars in my country. [0003] In order to improve the NVH performance of the diesel engine, in the prior art, the engine mount matching is optimized for the vehicle, a...

Claims

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Application Information

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IPC IPC(8): F02D41/08
Inventor 刘健曹付广牛立亚李进普聂庆东何荣章
Owner GREAT WALL MOTOR CO LTD
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