Electronic control component of fuel system and fuel system control method

Abstract

The application discloses an electric control component of a fuel system and a fuel system control method. The electric control component includes a casing, a first valve core and a second valve core. The casing is provided with four interfaces; the first interface of the casing passes through an air filter. The cleaner communicates with the atmosphere, a first channel and a first valve core are arranged between the first interface and the second interface of the casing; the second interface is connected with the exhaust port of the carbon canister, and the third interface of the casing is connected to the inlet of the carbon canister. The air port is connected, and an oil and gas isolation device is arranged between the second port and the third port; the fourth port of the casing is connected to the exhaust port of the fuel tank, and a second valve core and a second valve core are arranged between the fourth port and the third port. aisle. The application uses electronic control components to integrate various functions, realizes valve linkage, achieves low power consumption and lightweight effects, and reduces the corresponding accessories such as wiring harnesses, prime movers, pipelines, etc., reducing the cost of the fuel system. Design, shorten the part development and design cycle.

Description

technical field [0001] The present application relates to the technical field of vehicles, and more particularly, to an electronic control component of a fuel system and a fuel system control method. Background technique [0002] At present, the fuel vapor management method used in the high-pressure fuel system of most vehicles is to use the isolation valve (FTIV). The FTIV actively opens the solenoid valve to balance the positive and negative pressures. In the state of power failure or failure of the solenoid valve, the mechanical valve of the FTIV will not work until the threshold value is reached, and it also needs to cooperate with the fuel filling limit valve (FLVV) on the fuel tank to control the fuel tank filling amount. Because the common FLVV valve is closed mechanically, the development and verification cycle time is long, the mold development cost is high, and each fuel tank needs to be used with a specific valve, which is less versatile. [0003] At the same tim...

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Problems solved by technology

[0004] To sum up, the structural design of various functions such as fuel tank pressure, fuel injection volume, and leak detection in the fuel system of existing fuel vehicles are scattered, resulting in a large amount of materials such as wiring harnesses and pipelines, and high complexity of equipment, while improving the efficiency of the fuel system. Cost, and poor versatility, resulting in long parts development and design cycle

[0005] In addition, FLVV has an upper limit of exhaust flow. When the flow rate is higher than the upper limit, the valve core of FLVV will be blown up by the air flow, causing blockage and unable to exhaust.

Generally, the design pressure relief flow of FTIV does not exceed the upper limit of FLVV. The opening of FTIV is generally customized, and the exhaust flow cannot be controlled, resulting in low overall exhaust efficiency.

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