Fuel oil leakage diagnosis method and device as well as computer readable storage medium

A diagnostic method and a diagnostic device technology, which are applied to combustion engines, internal combustion piston engines, mechanical equipment, etc., and can solve problems such as diagnostic robustness, low diagnostic rate, and poor applicability

Inactive Publication Date: 2020-01-10
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a fuel leakage diagnosis method, device and computer-readable storage medium, aiming to solve the technical problems of poor applicability, low diagnostic robustness and low diagnostic rate of the existing fuel leakage diagnostic schemes

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  • Fuel oil leakage diagnosis method and device as well as computer readable storage medium
  • Fuel oil leakage diagnosis method and device as well as computer readable storage medium
  • Fuel oil leakage diagnosis method and device as well as computer readable storage medium

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Embodiment Construction

[0042] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043] The fuel oil leakage diagnosis device of the present invention is suitable for the fuel oil diagnosis system of the vehicle, including fuel oil diagnosis systems such as automobiles and motorcycles. The fuel oil diagnosis system includes a fuel tank system, a fuel oil leakage diagnosis device and an engine control unit ECU. Tank ventilation equipment, the fuel leakage diagnostic device includes a solenoid valve and an air pump, the solenoid valve is electrically connected to the engine control unit ECU, and is used to control the switch state of the solenoid valve through the engine control unit ECU, and the air pump is connected to the engine control unit ECU The electrical connection is used to obtain the pump current of the air pump, and the air pump, the electromagnetic valve and the oil tank system are conn...

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Abstract

The invention discloses a fuel oil leakage diagnosis method. The fuel oil leakage diagnosis method comprises the following steps: after the time of a vehicle in a post operation stage reaches to preset time, monitoring state information of the vehicle by an engine control unit (ECU), and judging whether the current vehicle meets a preset diagnosis enabling condition or not according to the state information; if the current vehicle meets the preset diagnosis enabling condition, controlling an electromagnetic valve through the ECU to open and starting a gas pump to pump gas for a fuel tank system; and acquiring the pressure change value of the fuel tank system and determining whether the oil tank system is leaked or not according to the pressure change value. The invention also discloses a flue oil leakage diagnosis device and a computer readable storage medium. Fuel oil leakage diagnosis can be executed without making natural vacuum effect after an engine operates for a period of time or having strict requirement on the idling working condition of the engine; meanwhile, high diagnosis robustness and actual diagnosis rate are guaranteed.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a fuel leakage diagnosis method, device and computer-readable storage medium. Background technique [0002] In the face of increasingly severe environmental pressure, in order to reduce the pollution of fuel vapor as much as possible, GB18352-2016 "Limits and Measurement Methods of Pollutant Emissions from Light Vehicles (China Phase Six)" (hereinafter referred to as the National VI Regulations) regulates fuel vapor Stricter restrictions have been imposed, and at the same time, the requirements for the leakage diagnosis of the fuel evaporation system have been introduced, requiring on-board diagnostics to accurately detect fuel leakage greater than or equal to 1mm in the fuel evaporation system. This is a huge challenge for manufacturers of National VI vehicles. [0003] At present, the industry's diagnostic solutions for vehicle fuel system leakage mainly include EONV...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22
CPCF02D41/22F02D2041/225Y02T10/40
Inventor 李玉龙吴代明刘世鹏张世昊
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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