A control method and device for an engine management system

A technology of engine management and control method, which is applied in the direction of engine control, machine/engine, electrical control, etc. It can solve the problems of reducing the overall control performance of the engine system and affecting the precise control of the engine air intake system, so as to prevent adverse consequences and prevent Undesirable consequences, improving the effect of precise control

Active Publication Date: 2016-10-19
SAIC MOTOR
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  • Abstract
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Problems solved by technology

[0003] However, in the existing engine management system, since the measured value of the air flow is inconsistent with the actual air flow, it will affect the precise control of the engine intake system and reduce the overall control performance of the engine system

Method used

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  • A control method and device for an engine management system
  • A control method and device for an engine management system
  • A control method and device for an engine management system

Examples

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Embodiment Construction

[0041] The EMS system can control the amount of air intake according to the vehicle's operating conditions. In practical application, the EMS system measures the amount of intake air after air filtration through the air flow meter, and uses the value of the intake air volume as the actual flow of air flow for subsequent precise control of the vehicle. In the engine intake system of the vehicle, the pipeline from the air flow meter to the boost pressure sensor (Boost Pressure Sensor, BPS) passes through the compressor, the intercooler, the throttle valve and the corresponding connecting pipelines. This path is long and complex, so a pressure drop is inevitable. Moreover, since the pipeline pressure is relatively high after passing through the compressor, it is very easy to cause air leakage. These situations will cause the amount of fresh air actually entering the cylinder to be smaller than the measured value measured by the HFM, thereby causing other adverse consequences, su...

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Abstract

The invention provides a control method and device for an engine management system. The method comprises the steps of comparing measurement values of air flow and a calculation value of air flow to obtain deviations, wherein the calculation value of air flow is the theoretical value of air flow obtained through calculation; when the deviations between the measurement values of air flow and the calculation value of air flow are greater than a preset air flow threshold value, controlling an actuator to increase air flow or limit torque. The method and the device can improve the control performance of an engine management system (EMS).

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a control method and device for an engine management system. Background technique [0002] The existing engine management system (Engine Management System, EMS) can control the amount of air intake according to the requirements of the vehicle's working conditions. In practical application, the engine management system measures the air intake volume after air filtration through an air flow meter (Hot Film air mass Meter, HFM), and uses the value of this intake air volume as the air flow rate as a reference value, and uses in vehicle control. [0003] However, in the existing engine management system, since the measured value of the air flow is inconsistent with the actual air flow, it will affect the precise control of the engine intake system and reduce the overall control performance of the engine system. Contents of the invention [0004] The problem solved by the embodimen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/02F02D29/02F02D41/30
Inventor 杨芾朱国华张咏江胡建月曾斌
Owner SAIC MOTOR
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