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Fuel oil system of automobile and leakage detection method of fuel oil system

A fuel system and leak detection technology, applied in the field of vehicles, can solve problems such as false alarms and detection errors

Inactive Publication Date: 2021-07-30
YAPP AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This application provides a fuel system of an automobile and a leak detection method of the fuel system, which fundamentally solves the problems of detection errors and false alarms caused by reference holes by measuring pressure and judging pressure drop

Method used

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  • Fuel oil system of automobile and leakage detection method of fuel oil system
  • Fuel oil system of automobile and leakage detection method of fuel oil system
  • Fuel oil system of automobile and leakage detection method of fuel oil system

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The automobile of this application includes an engine and a fuel system. Such as image 3 As shown, the fuel system includes a fuel tank 1, a fuel vapor recovery tank 2 and a leak detection device. The fuel tank is connected to the fuel vapor recovery tank, and the fuel vapor recovery tank 2 is provided with an exhaust port. At the same time, the vapor collected in the fuel vapor recovery tank 2 is transported to the engine through pipelines for recycling. There is a pressure sensor on the fuel system.

[0042] As an example, such as image 3 As shown, the pressure sensor 6 is installed in the fuel tank 1 .

[0043] The leak detection device includes a microcontroller 7 and detection components. The detection components include a pressure regulator and a normally open electromagnetic valve. The air inlet of the normally open electromagnetic valve is connected to the exhaust port of the fuel vapor recovery tank 2. The normally open electromagnetic valve The air outle...

Embodiment 2

[0054] The present application also provides a fuel system leak detection method related to the fuel system of the automobile mentioned above. Such as Figure 8 As shown, the leak detection method includes the following steps:

[0055] S810: Control the normally open solenoid valve to be electrically closed in response to the leakage detection signal, and simultaneously start the pressure regulator to regulate the pressure.

[0056] S820: Stop the pressure regulator in response to the pressure of the fuel system reaching a preset pressure value, and the fuel system enters a pressure maintaining state.

[0057] S830: Collect the pressure signal of the fuel system within a preset time.

[0058] S840: Calculate the difference between the earliest pressure value and the latest pressure value within a preset time, as a pressure change detection value.

[0059] S850: Determine whether the difference between the pressure change detection value and the pressure change standard valu...

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PUM

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Abstract

The invention discloses a fuel oil system of an automobile and a leakage detection method of the fuel oil system. The fuel oil system is provided with a pressure sensor, and the fuel oil system comprises a fuel oil steam recovery tank and a leakage detection device; the leakage detection device comprises a microcontroller and a detection part, the detection part is installed between the fuel steam recovery tank and the atmosphere, and the detection part comprises a pressure regulator and a normally open solenoid valve; an air inlet of the normally open solenoid valve is connected with an exhaust port of the fuel steam recovery tank, and an air outlet of the normally open solenoid valve communicates with the atmosphere; and the normally open solenoid valve is in signal connection with the microcontroller, and the microcontroller is in signal connection with a pressure sensor and the pressure regulator. The problems of detection errors and false alarms caused by a reference hole are fundamentally solved by adopting a mode of measuring pressure and judging pressure drop.

Description

technical field [0001] The present application relates to the technical field of vehicles, and more specifically, relates to a fuel system of an automobile and a leak detection method of the fuel system. Background technique [0002] The requirements for vehicle emissions in laws and regulations are getting higher and higher. At present, more and more vehicles are designed with leakage detection modules. This leakage detection module can detect the leakage of tiny holes in the entire fuel system to prevent fuel leakage and ensure The tightness of the fuel system protects the environment and ensures the safety of vehicles. [0003] At present, the main leakage detection method is to use the leakage hole (also called reference hole) set on the leakage detection module to determine the current change standard value of the motor or the pressure change standard value of the fuel system, and the current change value or pressure change standard value The value is used as a referen...

Claims

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Application Information

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IPC IPC(8): F02M25/08F02D41/00F02D41/22
CPCF02D41/003F02D41/22F02D2041/225F02M25/0809
Inventor 姜林高德俊吕昊李进刘亚洲周传军张艳波严济彦朱亮
Owner YAPP AUTOMOTIVE PARTS
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