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Idling target rotating speed control method

A target speed and control method technology, applied in the field of idle speed target speed control, can solve the problems of aggravated speed fluctuations, large fluctuations, load feedback and load synchronization, and achieve the effect of enhancing load resistance and improving stability

Active Publication Date: 2020-07-03
DONGFENG MOTOR CORP HUBEI
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Problems solved by technology

[0003] The reason is mainly that when the battery is deeply fed (the power is less than 50%), the power supply system of the vehicle mainly exhibits two characteristics: 1. The voltage stability of the vehicle grid will decrease; 2. The charging current of the storage battery will not be stable. stable and fluctuating
The generator is controlled by constant voltage, and the stability of grid voltage / charging current will decrease, which will aggravate the fluctuation range of generator excitation regulation, and then affect the synchronization of load feedback and load.
This shows that the power generation capacity of the generator at low speed is not enough to meet the electrical consumption of the whole vehicle, which intensifies the speed fluctuation

Method used

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Taking an engine of a certain model as an example, the generator load, atmospheric pressure sensor, intake air temperature sensor, and coolant temperature sensor are processed through the hardware input module to obtain the generator load signal, atmospheric pressure, intake air temperature, and coolant temperature Wait for the signal.

[0024] The first-order low-pass filter processing is performed on the input ECU generator load signal through the speed arbitration module, and the signal filter strength is adjusted by the low-pass filter coefficient f. The smaller the coefficient, the stronger the filter ability. The original voltage signal of the engine fluctuates greatly, so it needs to be processed by low-pass filtering to remove invalid high-frequency impurity signals, and the filtered generator load signal is selected. ...

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Abstract

The invention relates to the technical field of automobile control, in particular to an idling target rotating speed control method. The idling target rotating speed control method includes the stepsthat operating information of a vehicle is acquired, data of the engine load, the atmosphere pressure, the air inflow temperature and the cooling liquid temperature of the vehicle is acquired, an idling target rotating speed K1 is determined based on an engine load signal of the vehicle, then the idling target rotating speed K1 based on the engine load signal is corrected through the atmosphere pressure, the air inflow temperature and the cooling liquid temperature, and a current engine idling target rotating speed L is obtained. The influences of the engine load signal on the engine idling target rotating speed are fully considered, in combination with the atmosphere pressure, the air inflow temperature and the cooling liquid temperature, the idling target rotating speed best conforming to the operating condition of an engine is obtained, the stability of the engine during idling operation can be improved advantageously, and great promotional value is achieved.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a method for controlling an idle speed target speed. Background technique [0002] Existing engine idling target speed control methods generally collect parameters such as atmospheric pressure, coolant temperature, and intake air temperature, and then select an appropriate engine idling target speed for control based on these parameter information. This control method does not consider power generation. The influence of the engine load signal on the engine idle speed target speed. During the actual development process, it was found that if a certain model is equipped with a normal generator with excitation voltage feedback signal (EMS cannot control whether it is charged or not), under the condition of heavy electrical load at idle speed and the battery is completely depleted of power, the idle speed vibration is obvious, which affects the whole vehicle Idling stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/06F02D41/08
CPCF02D29/06F02D31/001F02D41/083F02D41/086
Inventor 张顺陈孔武李仕成彭浩满全平
Owner DONGFENG MOTOR CORP HUBEI
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