Diesel engine control method and device

A control method and diesel engine technology, applied in engine control, electrical control, fuel injection control, etc., can solve problems such as multiple intake air volume, turbo hysteresis, and smoke, and achieve the effect of avoiding smoke

Active Publication Date: 2019-01-08
WEICHAI POWER CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, most diesel engines use supercharging and intercooling technology, and turbo lag is common. Coupled with the resistance of the intercooler and the long intake pipeline, it is easy to stop when the vehicle is stationary and the accelerator ped

Method used

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  • Diesel engine control method and device
  • Diesel engine control method and device
  • Diesel engine control method and device

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[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0031] The embodiment of the present invention provides a diesel engine control method, which is applied to a diesel engine controller, and the method flow chart is as follows figure 1 As shown, including the following steps:

[0032] S10: Under the condition that the preset smoke limit operating condition is currently met, obtain the air-fuel ratio corresponding to the preset preset smoke limit operating condition.

[0033] In the process o...

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Abstract

The invention provides a diesel engine control method and device. The method is applied to a diesel engine controller and comprises the steps that under the circumstance that the preset smoke intensity limit working condition at present is met, the preset air-fuel ratio corresponding to the preset smoke intensity limit working condition is obtained; the air-fuel ratio is processed to obtain a newair-fuel ratio, and the new air-fuel ratio is larger than the air-fuel ratio; the current air inflow of a diesel engine is obtained, and the target fuel-injection quantity is calculated according to the current air inflow and the new air-fuel ratio; and the diesel engine is controlled to conduct fuel injection operation according to the target fuel-injection quantity. According to the diesel engine control method and device, on the one hand, the fuel-injection quantity of the diesel engine can be limited by setting the air-fuel ratio, on the other hand, under the circumstance that the currentair inflow is fixed, compared with the air-fuel ratio, the new air-fuel ratio is smaller than the target fuel-injection quantity obtained through calculation, and accordingly, the fuel-injection quantity of the diesel engine is further limited. Thus, the problem that under the smoke intensity limit working condition, due to the fact that the fuel-injection quantity is large, the air inflow is obviously low and is increased slowly, and smoke occurs can be relieved and even solved.

Description

technical field [0001] The invention relates to the technical field of diesel engines, more specifically, to a method and device for controlling a diesel engine. Background technique [0002] At present, most diesel engines use supercharging and intercooling technology, and turbo lag is common. Coupled with the resistance of the intercooler and the long intake pipeline, it is easy to stop when the vehicle is stationary and the accelerator pedal is stepped on suddenly or the vehicle is stable. When the accelerator is suddenly released at high speed and then stepped on suddenly, due to the large amount of fuel injection, the intake air volume is obviously low and the rise is slow, resulting in smoke. Contents of the invention [0003] In view of this, in order to solve the above problems, the present invention provides a control method and device. The technical solution is as follows: [0004] A method for controlling a diesel engine, applied to a diesel engine controller,...

Claims

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Application Information

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IPC IPC(8): F02D41/14F02D41/30F02D41/22
CPCF02D41/1475F02D41/22F02D41/30
Inventor 武玉臣梁健星杨新达朱江苏李万洋
Owner WEICHAI POWER CO LTD
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