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Method for controlling fuel switching of oil and gas dual-purpose vehicle synchronously

A synchronous control and dual-purpose vehicle technology, applied in electrical control, engine control, combustion engine, etc., can solve problems such as engine running instability and engine flameout, and achieve the effect of preventing flameout, improving performance and comfort

Inactive Publication Date: 2013-04-03
力帆科技(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This way of switching directly from the oil mode to the gas mode or from the gas mode to the oil mode will easily cause the engine to run unstable and cause the engine to stall

Method used

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  • Method for controlling fuel switching of oil and gas dual-purpose vehicle synchronously
  • Method for controlling fuel switching of oil and gas dual-purpose vehicle synchronously
  • Method for controlling fuel switching of oil and gas dual-purpose vehicle synchronously

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Embodiment Construction

[0031] In order to make the purpose, technical solution, and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings.

[0032] figure 2 It is a flowchart of a fuel conversion synchronous control method for an oil-gas dual-purpose vehicle; as can be seen from the figure, the control method includes the following steps:

[0033] (1) The vehicle starts and the EFI system starts to work;

[0034] (2) The CNG controller judges whether the switching condition is met, and if not, continue to judge; among them, the switching condition is that the CNG controller receives the request signal for the vehicle to use gas, and the engine water temperature, engine speed, gas temperature, gas cylinder pressure The set value is reached, and there is no fault inside the CNG controller. In the beginning of this embodiment, the preferred switching condition is that the request signal of the vehicle ...

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PUM

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Abstract

A synchronous control method for fuel switch of an oil-gas dual-mode vehicle includes the following steps: (1) starting the vehicle, and an electric injection system is started; (2) judging whether the switch condition is satisfied by a CNG controller, if not, judging is continued; (3) if the switch condition is satisfied, fuel of the engine is switched according to a sequence of the first cylinder, the third cylinder, the fourth cylinder and the second cylinder by the CNG controller,the fuel of the third cylinder is switched after the fuel of the first cylinder is switched for X1 cycles; the fuel of the fourth cylinder is switched after the fuel of the third cylinder is switched for X3 cycles, finally the fuel of the second cylinder is switched after the fuel of the fourth cylinder is switched for X4 cycles, wherein X1, X3 and X4 are calibratable coefficients; (4) ending. The method improves the performance and ride comfort of an automobile.

Description

technical field [0001] The present invention relates to an automobile air injection control method, in particular to a synchronous control method for an automobile CNG (Compressed Natural Gas, compressed natural gas) air injection nozzle. Background technique [0002] In a separate CNG control system, such as figure 1 As shown, the ECU (Electronic Control Unit, electronic control unit) is completely independent from the CNG control system. The fuel injection driving signal of the EFI ECU is input to the electronic relay of the CNG controller, and then the CNG controller controls the fuel injection or air injection. . [0003] When this separate CNG control system is used for control, when the vehicle is in the fuel consumption mode, the electronic relay inside the CNG controller directly connects the fuel injection drive signals of cylinders 1 to 4 sent by the ECU controller with cylinders 1 to 4. The fuel injectors of the cylinders are directly connected, and the fuel inj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D19/06
CPCF02D41/0025F02D19/0615F02D19/061F02D19/0631Y02T10/36F02D41/008F02D19/0647Y02T10/30
Inventor 罗永国
Owner 力帆科技(集团)股份有限公司