Judgment method for idle speed automatic stop demand of direct injection gasoline engine
A technology of automatic shutdown and direct injection in the cylinder, which is applied in the direction of machine/engine, mechanical equipment, engine control, etc., can solve the problems of wasting program resources and increasing the cost of software running time, and achieves the effect of reducing fuel consumption and saving fuel.
Inactive Publication Date: 2017-03-15
CHINA FIRST AUTOMOBILE
View PDF5 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The existing judgment method does not set the priority, and all the judgment conditions are judged together to determine whether the fuel cut-off is met, which wastes program resources and increases the cost of software running time
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The patent of the present invention will be further described below in conjunction with the accompanying drawings and embodiments; the method for judging the demand for automatic shutdown at idle speed of an in-cylinder direct injection gasoline engine is characterized in that: in the idle speed condition of an in-cylinder direct injection gasoline engine, first determine whether the prerequisites for automatic shutdown at idle speed of the engine are satisfied, Then determine whether the vehicle state allows the engine to stop automatically at idling speed, and determine whether the driver has a shutdown demand, so as to determine whether to set the engine shutdown demand flag;
[0015] Judging whether the engine has a shutdown requirement can be divided into the following steps: setting the priority of automatic shutdown judgment conditions, setting the prerequisites for shutdown, and setting whether the ambient pressure in the prerequisites meets the shutdown condition...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a judgment method for an idle speed automatic stop demand of a direct injection gasoline engine. The method is characterized by comprising the steps of: in an idle speed working condition of the direct injection gasoline engine, firstly judging whether an idle speed automatic stop precondition of the engine is satisfied or not; and then judging whether a vehicle state permits idle speed automatic stop of the engine or not, and judging whether a driver has a stop demand or not, so as to judge whether an engine stop demand mark is set or not. The judgment method setting the judging priority firstly judges whether the automatic stop precondition is satisfied or not. Once the precondition is not satisfied, judgment is immediately terminated, so that the program operating time is shortened, the efficiency is improved, fuel can be better saved in the idle speed working condition of the engine, and the fuel consumption is controlled.
Description
technical field [0001] The invention relates to an in-cylinder direct-injection gasoline engine idling automatic shutdown requirement determination method, which mainly can determine whether the engine can be temporarily shut down in the idling condition according to the driver's operation and system requirements, so as to save fuel, and belongs to the field of gasoline engine control. Background technique [0002] For central cities, especially cities with traffic congestion, the energy-saving performance of idling start-stop control technology is remarkable. Considering the fourth stage of the national fuel consumption regulations, combined with the company's internal control fuel consumption indicators, some models need to be equipped with idling start-stop control systems, and the establishment of the company Unique idling start-stop fuel-saving brand technology. As a part of the idling start-stop control strategy, the idling automatic stop demand determination method ca...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): F02D17/04
CPCF02D17/04
Inventor 龙立高天宇张慧峰唐江王强李家玲孙鹏远欣白宇
Owner CHINA FIRST AUTOMOBILE