Method for processing engine air inlet temperature sensor fault

A sensor failure, intake air temperature technology, applied in the direction of engine control, machine/engine, electrical control, etc., can solve problems such as danger, no emergency treatment, and potential safety hazards, and achieve the effect of ensuring safe driving

Inactive Publication Date: 2008-12-24
CHINA VAGON AUTOMOTIVES HLDG CO LTD
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  • Abstract
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Problems solved by technology

At present, when the car is running, when the intake air temperature sensor fails, the ECU usually does not take emergency measures, so there are potential safety hazards and are very dangerous

Method used

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  • Method for processing engine air inlet temperature sensor fault

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] combine figure 1 , the present embodiment judges whether the intake air temperature sensor of the engine fails, including: first, obtaining the electrical diagnosis synchronization delay of the intake air temperature and the coolant temperature, and obtaining the time for the engine to go from the starting state to the idle state or to the partial load state; When the electrical diagnosis synchronization delay is greater than the time, the intake air temperature is obtained through the intake air temperature sensor, and the signal is obtained by the intake air temperature sensor according to the intake air temperature in the driving cycle, and transmitted to the ECU...

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Abstract

The invention discloses a method for processing a sensing fault of an intake temperature of an engine, comprising the following steps that: S1. synchronous delay of electrodiagnosis of the intake temperature and a temperature of a cooling liquid are obtained, and time of the engine from a startup state to an idle state or a partial loading state is obtained; S2. when the synchronous delay of the electrodiagnosis is more than the time, the intake temperature is obtained by a sensor of the intake temperature, and the intake temperature is transmitted to an electrical control unit ECU; S3. The ECU judges whether the sensor of the intake temperature has the fault according to the intake temperature; and S4. when the sensor of the intake temperature has the fault, the ECU carries out an emergency treatment to the intake temperature so as to allow the engine to operate normally. The ECU diagnoses the sensor of the intake temperature by collecting a signal of the sensor of the intake temperature to determine whether the signal has the fault, and carries out the emergency treatment to the engine which has the fault to the sensor of the intake temperature. The diagnosis technique is executed when the engine is operated, and the intake temperature is monitored at moment so as to guarantee safe driving of vehicles.

Description

technical field [0001] The invention relates to the field of engines, in particular to a method for processing faults of an engine intake air temperature sensor. Background technique [0002] There are clear regulations in the quality requirements of today's automobiles, and the ECU (Electronic Control Unit, Electronic Control Unit) of the automobile must have the function of diagnosing each running part of the automobile. These diagnostic functions are to assist the ECU to make emergency driving control actions to protect the driving safety of the driver and the vehicle when the car has an engine failure during driving. [0003] The diagnostic method mainly includes the following diagnostic objects: camshaft diagnosis, crankshaft diagnosis, intake air temperature sensor diagnosis, knock sensor diagnosis, coolant temperature diagnosis, oxygen sensor diagnosis, coolant and cooling fan control delay Diagnostics, air conditioning control delay diagnostics and more. At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22
Inventor 李朝晖张步亮何文鑫高志远
Owner CHINA VAGON AUTOMOTIVES HLDG CO LTD
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