Control method for rapid acceleration process of vehicle and vehicle

A control method and rapid acceleration technology, applied in the field of vehicles, can solve the problems of sudden increase in fuel injection amount, insufficient fuel combustion in the cylinder, affecting engine emission performance, etc., to achieve the effect of ensuring emission performance and comfort.

Pending Publication Date: 2021-06-11
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a control method for the rapid acceleration process of the vehicle and the vehicle, so as to solve the problem in the prior art that the fuel injection volume increases instantaneously after the accelerator opening increases rapidly, so that the response speed of the intake air cannot meet the fuel injection volume. Increased speed, resulting in insufficient combustion of fuel in the cylinder, resulting in affecting engine emission performance, and technical problems affecting driving comfort due to sudden increase in fuel injection volume

Method used

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  • Control method for rapid acceleration process of vehicle and vehicle
  • Control method for rapid acceleration process of vehicle and vehicle

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Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the present embodiment provides a method for controlling the rapid acceleration process of the vehicle, including the following steps:

[0021] Real-time detection of accelerator pedal opening. In this embodiment, the opening of the accelerator pedal is detected by the accelerator pedal position sensor, and the detection method is simple and feasible.

[0022] When it is detected that the accelerator pedal opening at the current moment is greater than the sum of the accelerator pedal opening at the previous moment and the increase threshold, the temporary accelerator opening is used, and the temporary accelerator opening is the basis of the accelerator pedal opening at the previous moment In the above, the set step length is gradually increased, and the required fuel injection quantity is obtained based on the temporary throttle opening after each step increase. The required fuel injection volume is obtained based on the temporary throttle o...

Embodiment 2

[0025] Such as figure 2 As shown, the present embodiment provides a method for controlling the rapid acceleration process of the vehicle, including the following steps:

[0026] First, detect the opening of the accelerator pedal in real time. In this embodiment, the opening of the accelerator pedal is detected by the accelerator pedal position sensor, and the detection method is simple and feasible.

[0027] When it is detected that the accelerator pedal opening at the current moment is greater than the sum of the accelerator pedal opening at the previous moment and the increase threshold, the temporary accelerator opening is used, and the temporary accelerator opening is the basis of the accelerator pedal opening at the previous moment In the above, the set step length is gradually increased, and the required fuel injection quantity is obtained based on the temporary throttle opening after each step increase. Calculate the required fuel injection volume based on the tempor...

Embodiment 3

[0032] This embodiment provides a vehicle, which adopts the control method for the rapid acceleration process of the vehicle described in Embodiment 1 or Embodiment 2. By adopting the control method, the throttle opening can be gradually increased, so that the fuel injection amount can be gradually increased, avoiding Insufficient combustion of the fuel injected into the cylinder caused by excessive growth rate of the fuel injection quantity can ensure the emission performance of the engine and the driving comfort at the same time.

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Abstract

The invention relates to the technical field of vehicles, in particular to a control method for the rapid acceleration process of a vehicle and the vehicle. The control method for the rapid acceleration process of the vehicle comprises the following steps that the opening degree of an accelerator pedal is detected in real time, and when it is detected that the opening degree of the accelerator pedal at the current moment is larger than the sum of the opening degree of the accelerator pedal at the previous moment and an increasing threshold value, the temporary accelerator opening degree is adopted, the temporary accelerator opening degree is gradually increased according to the set step length on the basis of the accelerator pedal opening degree at the previous moment, and the required fuel injection quantity is obtained on the basis of the temporary accelerator opening degree obtained after the temporary accelerator opening degree is gradually increased in each step. By means of the control method, the opening degree of an accelerator can be gradually increased, so that the fuel injection quantity is gradually increased, the problem that because the fuel injection quantity is increased too much, fuel injected into a cylinder is combusted insufficiently is solved, the emission performance of an engine is guaranteed, and meanwhile the driving comfort can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a control method for a rapid acceleration process of a vehicle and a vehicle. Background technique [0002] Diesel engines are mostly under transient conditions in actual use, and rapid acceleration is the most common transient condition during vehicle operation. When the vehicle is in rapid acceleration, the driver’s demand for engine power suddenly suddenly At this time, the driver will step on the accelerator quickly. When the opening of the accelerator increases sharply, the fuel injection amount in the cylinder will increase instantly. Diesel engines are limited by the response speed of the intake system, and the response speed of the intake air volume cannot meet the increase speed of the fuel injection volume at this time, resulting in the high fuel injection volume and relatively low intake air volume at this time, resulting in poor combustion of the fuel injected into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30
CPCF02D41/30F02D2200/602
Inventor 陈月春李素婷赵伟王继磊刘加超
Owner WEICHAI POWER CO LTD
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