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A vehicle crawling target idle speed control method and system

A technology of idle speed and control method, applied in electrical control, engine control, fuel injection control and other directions, can solve the problems of high idle speed and safety hazards of vehicles, reduce safety hazards, avoid high vehicle speeds, and increase idle speed stability. Effect

Active Publication Date: 2021-08-06
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of one of the defects existing in the prior art, the purpose of this application is to provide a vehicle crawling target idle speed control method and system to solve the problem in the related art that the vehicle idle speed is too high to easily cause safety hazards

Method used

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  • A vehicle crawling target idle speed control method and system
  • A vehicle crawling target idle speed control method and system
  • A vehicle crawling target idle speed control method and system

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Embodiment Construction

[0058] The present application will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0059] see figure 1 As shown, the embodiment of the present application provides a vehicle creeping target idle speed control method, which includes the steps:

[0060]S1. Obtain a vehicle running signal, determine whether the vehicle is currently in a crawling condition, and output a first idle speed according to the current working condition of the vehicle. Wherein, the vehicle running signal includes clutch pedal opening, accelerator pedal opening, brake signal, transmission gear signal, and current vehicle speed signal. The above-mentioned openings of the clutch pedal and accelerator pedal are defined as 100 when they are fully depressed, and 0 when they are fully released.

[0061] S2. Obtain atmospheric pressure, intake air temperature, and coolant temperature, and correct the first idle speed to obtain an input idle speed.

[0062]...

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PUM

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Abstract

The present application discloses a method and system for controlling the idle speed of a vehicle crawling target, which relates to the field of automobile control technology. 1. Idle speed; obtain the atmospheric pressure, intake air temperature and coolant temperature, and correct the first idle speed to obtain the input idle speed; perform gradient constraints on the input idle speed to obtain the engine target idle speed. The vehicle crawling target idle speed control method and system of the present application can optimize the control process of switching from high target idle speed to crawling idle speed by using existing hardware equipment without increasing the development cost, and avoid sudden changes in the target idle speed. The phenomenon of high vehicle speed caused by excessive crawling speed during the combination process of engine and gearbox increases the smoothness of engine idling and reduces potential safety hazards.

Description

technical field [0001] The present application relates to the technical field of automobile control, in particular to a method and system for controlling the idle speed of a vehicle crawling target. Background technique [0002] At present, the engine target idle speed in the crawling phase of the vehicle is generally controlled based on the engine coolant temperature and the target speed of each gear. [0003] In related technologies, when the vehicle is in the idling state, setting a higher target idling speed is beneficial to speed up the warm-up speed and improve the conversion efficiency of the three-way catalytic converter. When the vehicle is in the crawling state, that is, the driver releases the accelerator, the clutch is in the semi-linkage or slipping state, the gear is in the first gear or reverse gear, and the accelerator pedal is not depressed. At this time, the engine is in the idle speed control state, and the vehicle relies on Engine power stays on the move...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D29/02F02D31/00F02D41/08
CPCF02D29/02F02D31/001F02D41/083F02D41/086F02D2200/501F02D2200/502F02D2200/602F02D2200/702F02D2200/703
Inventor 张顺程晓军汪侃陈孔武彭浩
Owner DONGFENG MOTOR CORP HUBEI