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Natural gas engine cylinder self-checking control system and natural gas engine cylinder self-checking control method

A technology of engine cylinder and control system, which is applied in engine control, electrical control, machine/engine, etc., and can solve problems such as unstable engine operation and unbalanced cylinders

Inactive Publication Date: 2013-04-17
上海格令汽车电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a natural gas engine cylinder self-checking control system, which is used to solve the problem of unbalanced cylinders encountered during engine operation
[0006] In addition, the present invention also provides a natural gas engine cylinder self-verification control method, which is a closed-loop control method that can dynamically solve the problem of unstable engine operation caused by nozzle consistency

Method used

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Embodiment 1

[0021] This embodiment provides a natural gas engine cylinder self-verification control system, such as figure 1 As shown, the self-checking control system includes an engine control unit (ECU) 1, an engine sensor 2 and an actuator 3; the engine sensor and the actuator are all connected to the engine control unit in communication; wherein the engine control unit 1 is used for The logic algorithm control of the entire self-checking control system includes the processing of input signals and output control; the engine sensor 2 is used to measure the engine speed signal; the actuator 3 is used to control the output drive injection pulse width signal.

[0022] The engine sensor 2 is a speed sensor. The engine speed sensor 2 includes commonly used magnetoelectric and Hall sensors. The actuator 3 includes a natural gas engine nozzle commonly used in various engines.

Embodiment 2

[0024] This embodiment provides a natural gas engine cylinder self-verification control method, the method comprising the following steps:

[0025] S10, the engine sensor measures the engine speed signal, and outputs the detected speed signal; the detailed process is: the engine sensor detects the fluctuation of the speed of each cylinder (that is, at each corresponding crankshaft angle), and then transmits the detected speed signal to the engine control unit.

[0026] S11, the engine control unit calculates the angular acceleration after the rotation speed signal is averaged through a cycle, and further confirms the operation status of each cylinder according to the angular acceleration;

[0027] S12, judging whether the angular acceleration deviates from a preset index value;

[0028] S13, when the angular acceleration deviates from the preset index value, start the software adaptive program, adjust the driving injection pulse width of the natural gas nozzle of each cylinde...

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Abstract

The invention discloses a natural gas engine cylinder self-checking control system and a natural gas engine cylinder self-checking control method. The control system comprises an engine control unit, an engine sensor and an actuator. The engine sensor and the actuator are in communicating connection with the engine control unit. The engine sensor is used for measuring an engine rotating speed signal. The actuator is used for controlling an output drive air injection pulse width signal. The engine control unit is used for calculating angular acceleration of the rotating speed signal through circulating average, accordingly changing drive air injection pulse width of cylinder natural gas spray nozzles in a software adjusting mode and then sending the output drive air injection pulse width signal to the actuator. The actuator controls natural gas injection amount of cylinders according to the received drive air injection pulse width signal. The natural gas engine cylinder self-checking control system and the natural gas engine cylinder self-checking control method can solve the control problem caused by consistency of the spray nozzles of the natural gas engine control system, maintain stable torque outputting of a natural gas engine, have protective effect on the engine and can be applied to control of different natural gas engines.

Description

technical field [0001] The invention belongs to the technical field of engine electronic control, and relates to an engine verification control system, in particular to a natural gas engine cylinder self-verification control system and method. Background technique [0002] Natural gas electronic control system, as one of the core technologies for internal purification and fuel consumption control of natural gas engines, is the most effective solution to make gas vehicle emissions meet National IV or above emission regulations. Its primary task is to adjust the torque output of the engine in disguise by controlling various factors that affect the engine torque generation, including the control of the engine intake charge, the control of the mixture and air-fuel ratio, and the ignition control. [0003] The natural gas engine control system is composed of four parts, among which the gas supply system is composed of electronic throttle, intake pipe and intake air temperature / pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30
Inventor 王飞邓金滔张鹏
Owner 上海格令汽车电子有限公司
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