Logic control method for improving starting performance of vehicle

Abstract

The invention relates to a logic control method for improving the starting performance of a vehicle, which comprises the following steps of: judging whether the vehicle is in a starting process at present or not by a starting-assisting function module according to a vehicle-speed signal, an engine rotating-speed signal, a speed-changer gear signal, an electronic accelerator-pedal opening signal and a braking signal; if so, calculating and outputting a starting-target idling-speed increment to an idle-speed control function module according to a current engine water-temperature signal, and controlling an engine by the idle-speed control function module to increase the starting-target idling-speed increment part to be used as a target idle speed in the starting process by the engine on the basis of an original target idle speed; and after the starting process of the vehicle is judged to be finished by the starting-assisting function module according to the vehicle-speed signal, the speed-changer gear signal, the electronic accelerator-pedal opening signal or the braking signal, quitting a starting-assisting function to enable the engine to be restored at the original target idle speed to normally operate. Through the control method, the engine can have a lower idling speed in an idle-speed state, and the vehicle has a higher idling speed in the starting process.

Description

technical field [0001] The invention relates to a logic control method for improving vehicle starting performance. Background technique [0002] In vehicle development, in order to meet the requirements of NVH performance and fuel consumption indicators, the idle speed of the engine is usually set to be low, and the power performance of the engine at a low idle speed is poor, resulting in poor starting performance of the vehicle. The engine is easy to stall when the vehicle is started, especially when the engine stalls when starting on a hill. Contents of the invention [0003] The object of the present invention is to provide a logic control method for improving the starting performance of the vehicle, so that the engine has a lower idle speed in the idling state and a higher idle speed during the vehicle starting process. [0004] The logic control method for improving the starting performance of the vehicle in the present invention is: the starting auxiliary function m...

AI Technical Summary

Problems solved by technology

[0002] In vehicle development, in order to meet the requirements of NVH performance and fuel consumption indicators, the idle speed of the engine is usually set to be low, and the power performance of the engine at a low idle speed is poor, resulting in poor starting performance of the vehicle. The engine is easy to stall when the vehicle starts, especially when the engine stalls when starting on a slope.

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