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Barometric pressure sensor detecting method and device

A technology of atmospheric pressure and detection method, applied in electrical control, machine/engine, fuel injection control, etc., which can solve problems such as inaccurate fuel injection volume, inaccurate atmospheric pressure value, and easy blockage of waterproof and ventilating holes

Active Publication Date: 2018-11-02
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to various reasons, the waterproof vent hole is easy to be blocked, resulting in inaccurate atmospheric pressure value measured by the atmospheric pressure sensor, which in turn makes the fuel injection quantity calculated by the electronic control unit inaccurate, and finally leads to insufficient power of the vehicle.

Method used

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  • Barometric pressure sensor detecting method and device

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Embodiment 1

[0035] figure 1 It is a flow chart of a detection method of an atmospheric pressure sensor provided in Embodiment 1 of the present invention. This embodiment is applicable to the detection of an atmospheric pressure sensor. The detection method can be performed by a detection device of an atmospheric pressure sensor. The pressure sensor is integrated in the vehicle electronic control unit, and the electronic control unit is electrically connected with the intake air pressure sensor of the vehicle engine. The detection method includes:

[0036] Step 110, when it is detected that the electronic control unit is powered on and the engine speed is 0, collect the atmospheric pressure value of the atmospheric pressure sensor and the intake pressure value of the intake pressure sensor;

[0037] The atmospheric pressure sensor is integrated inside the electronic control unit of the engine, and the surface of the electronic control unit is usually equipped with waterproof and ventilatin...

Embodiment 2

[0047] figure 2 It is a flow chart of a detection method of an atmospheric pressure sensor provided by Embodiment 2 of the present invention. This embodiment further provides an optional detection method of an atmospheric pressure sensor on the basis of the foregoing Embodiments 1.

[0048] Optionally, set the number of loops equal to 1.

[0049] Specifically, in the first driving cycle, various components such as the electronic control unit of the vehicle, the engine, the intake pressure sensor, and the atmospheric pressure sensor work for the first time, so in the first driving cycle, the memory of the electronic control unit There is no historical data of the engine intake pressure sensor and atmospheric pressure sensor in the vehicle, so the atmospheric pressure sensor can be detected normally only when the number n of driving cycles is detected to be greater than the set cycle number 1.

[0050] Optionally, the detection method of the atmospheric pressure sensor also in...

Embodiment 3

[0068] image 3 Shown is a schematic structural diagram of a detection device for an atmospheric pressure sensor provided by Embodiment 3 of the present invention. This embodiment is applicable to the detection of the atmospheric pressure sensor. The atmospheric pressure sensor is integrated in the electronic control unit of the vehicle, and the electronic control The unit is electrically connected to the intake air pressure sensor of the vehicle engine, and the detection device 200 includes:

[0069] The first collection module 210 is used to collect the atmospheric pressure value of the atmospheric pressure sensor and the intake air pressure value of the intake air pressure sensor when detecting that the electronic control unit is powered on and the rotational speed of the engine is 0;

[0070] The second collection module 220 is used to detect that the number of driving cycles n is greater than the set number of cycles, control the engine speed to be the first speed and col...

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Abstract

The invention discloses a barometric pressure sensor detecting method and device. The method comprises the steps that when it is detected that an electronic control unit is powered on and the rotationspeed of an engine is zero, barometric pressure values of a barometric pressure sensor and inlet pressure values of an inlet pressure sensor are collected; when it is detected that the number, namelyn of a driving cycle is greater than a set number of cycle, the rotation speed of the engine is controlled to be a first rotation speed, and a third inlet pressure value of the inlet pressure sensoris collected; and if the absolute value of a difference value of the second barometric pressure value and the first barometric pressure value is greater than a first pressure threshold value, the absolute value of a difference value of the second inlet pressure value and the first inlet pressure value is smaller than a second pressure threshold value, and the absolute value of a difference value of the third inlet pressure value and the second inlet pressure value is greater than a third pressure threshold value, barometric pressure sensor measuring results are invalid. According to the embodiment of the invention, the accuracy of the barometric pressure sensor measuring results is detected, faults of the barometric pressure sensor can be found in time, and normal running of vehicles is ensured.

Description

technical field [0001] Embodiments of the present invention relate to a pressure sensor detection technology, in particular to a detection method and device for an atmospheric pressure sensor. Background technique [0002] The atmospheric pressure sensor is widely used in the electronic control unit of the vehicle engine, and the engine determines the fuel injection quantity of the engine according to the atmospheric pressure value measured by the atmospheric pressure sensor in the electronic control unit. [0003] The atmospheric pressure sensor is usually embedded in the engine electronic control unit, and the surface of the electronic control unit is usually equipped with waterproof and ventilating holes, which can ensure that the electronic control unit does not enter water, and at the same time make the internal and external pressure of the electronic control unit the same, so that the atmospheric pressure sensor can measure atmospheric pressure . [0004] However, due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22
CPCF02D41/222Y02T10/40
Inventor 刘兴义陈琳
Owner WEICHAI POWER CO LTD
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