Fuel switching control method for dual-fuel vehicle

A dual-fuel vehicle and control method technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve problems such as easy to cause flameout

Inactive Publication Date: 2013-09-11
HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a hidden danger in the existing fuel switching control strategy for dual-fuel vehicles: when the gas cylinder is closed, gasoline is used to start, and o

Method used

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  • Fuel switching control method for dual-fuel vehicle
  • Fuel switching control method for dual-fuel vehicle

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Embodiment Construction

[0018] In order to further explain the technical means and effects that the present invention takes to achieve the intended purpose of the invention, the specific implementation, structure and features of the fuel switching control method for dual-fuel vehicles proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. and its effects are described in detail as follows:

[0019] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings. Through the description of specific implementation methods, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the attached drawings are only for reference and description, and are not used to explain the present invention...

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Abstract

The invention provides a fuel switching control method for a dual-fuel vehicle. The method includes: starting an engine of the dual-fuel vehicle in the gasoline state; judging whether the dual-fuel vehicle meets the conditions or not, including whether a switch of the dual-fuel vehicle is at a CNG position or not, whether engine water temperature of the dual-fuel vehicle is above the standard value or not, whether running time of the engine of the dual-fuel vehicle meets switching delay or not, whether engine speed of the dual-fuel vehicle is increased to above the standard value or not, and whether gas relative pressure of the dual-fuel vehicle is larger than the standard value or not; if the dual-fuel vehicle meets the conditions, switching to the gas state. The method has the advantages that the system still continues to operate by gasoline even when a driver mistakenly presses the switch when a gas storage cylinder closes, the alarm of gas insufficiency can also be sent out, and accordingly flameout is avoided.

Description

technical field [0001] The invention relates to the technical field of dual-fuel vehicles, and in particular to a fuel switching control method for dual-fuel vehicles. Background technique [0002] Petroleum energy is getting less and less, and the price is getting higher and higher. Traditional gasoline or diesel fueled vehicles can no longer meet the needs of future development. Dual-fuel vehicles that use natural gas as the main fuel have attracted more and more attention due to their superior emission performance, low cost of use, and good economic effects. At present, dual-fuel vehicles with natural gas as the main fuel have been widely used in my country's public transportation system. [0003] Due to the poor starting performance of natural gas, the existing dual-fuel vehicles are usually started under the state of gasoline. After the vehicle runs normally, and the water temperature, engine running time and speed all meet certain conditions, the fuel switch is switch...

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Application Information

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IPC IPC(8): F02D19/08
Inventor 余元骏吴成明杨安志金吉刚冯擎峰
Owner HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST
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