Fault-tolerant control method and control system for atmospheric pressure sensor for diesel engine

A technology of atmospheric pressure, fault-tolerant control, applied in electrical control, engine control, machine/engine, etc., can solve problems such as power drop, inability to judge atmospheric pressure, combustion deterioration, etc., and achieve the effect of avoiding combustion deterioration

Active Publication Date: 2021-01-26
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology

[0003] When the traditional ECU fault diagnosis module diagnoses the fault of the atmospheric pressure sensor, it generally uses a fixed value to replace the sampling value of the atmospheric pressure sensor. When the diesel engine is in the plateau state, the intake air volume is reduced, resulting in deterioration of combustion and power drop

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  • Fault-tolerant control method and control system for atmospheric pressure sensor for diesel engine
  • Fault-tolerant control method and control system for atmospheric pressure sensor for diesel engine
  • Fault-tolerant control method and control system for atmospheric pressure sensor for diesel engine

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Embodiment Construction

[0043] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0045] The core of the present invention is to provide a diesel engine atmospheric pressure sensor fault-tolerant control method and control system, the fault-tolerant control method and control system can predict the atmospheric pressure value in the form of model reconstruction when the atmospheric pressure sensor fails, and improve the high and low level of the diesel engine. environmental adaptability.

[0046] Such as figure 1 Shown is the fault-tolerant control method and the sensor layout of the control system. An atmospheric pressure sensor can be installed inside the ECU or in front of the air filter to measure the atmospheric pressure p 0 ; Install an air flow meter (AMF), in...

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Abstract

The invention provides a fault-tolerant control method and control system for an atmospheric pressure sensor for a diesel engine. The control method comprises the following steps of obtaining a faultstate of the atmospheric pressure sensor for the diesel engine according to a signal such as a voltage of the atmospheric pressure sensor for the diesel engine; and when the sensor is judged to be inthe fault state, operating an atmospheric pressure analysis redundancy algorithm model, and replacing a collected value of the sensor with a predicted value, to provide an accurate atmospheric pressure value for an ECU control system. Meanwhile, a corresponding measure is taken according to a working condition of the diesel engine when the atmospheric pressure sensor breaks down, that is, the control method can have relatively high fault-tolerant capacity when the atmospheric pressure sensor breaks down; a reasonable measure is taken in time; and therefore, the environmental adaptability of the diesel engine in a plateau and a plain is improved.

Description

technical field [0001] The invention belongs to the technical field of diesel engine fault diagnosis, and in particular relates to a fault-tolerant control method and control system of an atmospheric pressure sensor of a diesel engine. Background technique [0002] The requirements of high power density and plateau operation of diesel engines require that the diesel engine electronic control unit (ECU) can implement different oil-gas cooperative control strategies according to different altitudes, and improve the adaptive combustion capability of diesel engines at different altitudes, so as to meet the requirements of diesel engine plateau power recovery. [0003] When the traditional ECU fault diagnosis module diagnoses the fault of the atmospheric pressure sensor, it generally uses a fixed value to replace the sampling value of the atmospheric pressure sensor. When the diesel engine is in the plateau state, the intake air volume is reduced, which leads to the deterioration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22F02B77/08
CPCF02D41/222F02B77/08F02D2200/703Y02T10/40
Inventor 阴晋冠贾利肖维褚全红孟长江白思春李菲菲杨薇
Owner CHINA NORTH ENGINE INST TIANJIN
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