Fuel evaporation control system and control method for automobile
A control system and fuel vapor technology, which is applied in charging systems, engine components, machines/engines, etc., can solve problems such as affecting drivability, unknown degree of activated carbon saturation, affecting vehicle emissions, etc., and achieve the effect of improving control accuracy.
Active Publication Date: 2017-09-15
BEIQI FOTON MOTOR CO LTD
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Problems solved by technology
There are several deficiencies in this method of fuel evaporation control: 1. The degree of saturation of the activated carbon in the carbon tank is unknown, and the carbon tank solenoid valve can only be connected tentatively to detect the saturation of the carbon tank. This control method will affect the overall 2. The carbon canister needs air to participate in the process of fuel vapor desorption, that is, the gas flowing through the carbon canister solenoid valve is actually a mixture of oil vapor and air. In the technology, since the amount of oil vapor in the current circulating mixed gas is unknown, only after the mixed gas participates in combustion, the oxygen sensor detects the air-fuel ratio of the current working condition and feeds back to the electronic control unit, and the electronic control unit can calculate the oil vapor desorbed by the carbon canister solenoid valve , and according to the air-fuel ratio of this cycle, adjust the opening of the canister solenoid valve in the next cycle
This lagging and rough evaporation control strategy cannot achieve the best fuel economy and driving comfort
Method used
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[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0024] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the descrip...
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The invention discloses a fuel evaporation control system for automobiles and a fuel evaporation control method for automobiles. The fuel evaporation control system for automobiles comprises: a fuel tank for storing fuel; a carbon tank filled with activated carbon , the carbon tank has an inlet port and an outlet port, and the inlet port of the carbon tank is connected to the fuel tank for absorbing the fuel vapor generated by volatilization of the fuel; the engine is connected to the outlet port of the carbon tank; the solenoid valve is located at the outlet of the carbon tank Between the terminal and the engine; the gas sensor used to detect the concentration signal of the fuel vapor in the carbon canister; and the controller, the controller is connected with the solenoid valve and the gas sensor, and the controller controls the electromagnetic valve according to the concentration signal detected by the gas sensor. valve opening. The fuel evaporation control system for automobiles according to the embodiment of the present invention can effectively improve the control accuracy of fuel supply to the engine.
Description
technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a fuel evaporation control system for automobiles and a fuel evaporation control method for automobiles. Background technique [0002] In order to reduce the pollution of gasoline vapor in the fuel tank to the environment and improve fuel economy, automobile manufacturers generally use activated carbon canister systems to control fuel evaporation, and use activated carbon in the canister to absorb fuel vapor in the fuel tank. When the engine is running, the electronic control unit controls the on-off of the carbon canister solenoid valve, and relies on the vacuum in the intake pipe to suck the fuel vapor from the carbon canister into the intake port of the engine for combustion. This method of controlling fuel vapor reduces hydrocarbons in the atmosphere and saves fuel. [0003] In the existing evaporative emission control system, the carbon canister solenoid va...
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IPC IPC(8): F02M25/08
Inventor 刘婷李永双王晓峰
Owner BEIQI FOTON MOTOR CO LTD