Carbon tank electromagnetic valve opening control method

A technology of opening control and solenoid valve, applied in electrical control, engine control, fuel injection control, etc., can solve the problem of low precision of carbon canister flushing control, and achieve the effect of avoiding impact and preventing vehicle flameout

Inactive Publication Date: 2021-01-05
DONGFENG MOTOR CORP HUBEI
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Problems solved by technology

[0005] Chinese patent "flushing method, device and vehicle of vehicle carbon canister", publication number CN109973253A, publication date 2019.07.05, discloses a flushing method, device and vehicle of vehicle carbon canister, which is used to solve the problem of canister flushing in related technologies The problem of low control accuracy

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  • Carbon tank electromagnetic valve opening control method
  • Carbon tank electromagnetic valve opening control method

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Embodiment Construction

[0021] pass below Figure 1 ~ Figure 2 As well as listing some optional embodiments of the present invention, the technical solutions (including preferred technical solutions) of the present invention are further described in detail. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0022] Such as figure 1 and figure 2 As shown, the carbon canister electromagnetic valve opening control method disclosed by the present invention is as follows:

[0023] First, determine whether the engine meets the conditions for enabling the carbon tank, such as whether the water temperature exceeds a certain value (such as 40°C), whether the water temperature exceeds a certain value when the engine starts and the engine has...

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Abstract

According to a carbon tank electromagnetic valve opening control method, after it is judged that a carbon tank electromagnetic valve meets the enabled opening condition, the carbon tank electromagnetic valve is opened according to the target opening degree and the initial opening speed determined by the current working condition, and a real-time fuel oil adjusting coefficient is obtained from a system, specifically, if the current fuel oil adjusting coefficient is smaller than a first set value, the carbon tank electromagnetic valve is kept in the current opening degree until the fuel oil adjusting coefficient is equal to a second set value, if the current fuel oil adjusting coefficient is larger than the second set value, the opening degree and the opening speed of the carbon tank electromagnetic valve are corrected till the set target opening degree is achieved, and the fuel oil adjusting coefficient is a calculated value of the system for correcting the fuel injection quantity and controlling the target excess air coefficient at a theoretical value. According to the method, the concentration of carbon tank mixed gas is judged by utilizing a fuel oil correction coefficient for the first time, so that the opening speed and the target opening degree of the carbon tank electromagnetic valve are controlled, large impact of the the thick mixed gas from a carbon tank on the air-fuel ratio can be effectively avoided, and the problems of vehicle flameout and the like are avoided.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a method for controlling the opening of a carbon tank electromagnetic valve. Background technique [0002] With the gradual tightening of emission regulations, the requirements for evaporative pollutant emissions are getting higher and higher. In order to meet the requirements for evaporative pollutant emissions in the regulations, the fuel vapor evaporated from the fuel tank is adsorbed in the activated carbon tank. When the engine is running When using the negative pressure of the intake system, the fresh air desorbs the fuel vapor in the activated carbon through the carbon tank solenoid valve, and re-enters the engine for combustion to realize the regeneration of activated carbon and reduce the emission of evaporative pollutants. [0003] During the fuel vapor desorption process when the carbon canister solenoid valve is turned on, a thorny problem is faced. The concentration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02M25/08
CPCF02D41/003F02D41/0045F02M25/0836F02M2025/0845
Inventor 张同庆彭浩唐雄伟张珂丁济凡
Owner DONGFENG MOTOR CORP HUBEI
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