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Rapid warming-up method for gasoline engine

An engine and warm-up technology, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problems of complicated steps and difficult operation, achieve the best starting power, improve the quality of exhaust emission, and improve the success rate of starting Effect

Inactive Publication Date: 2009-08-05
CHINA VAGON AUTOMOTIVES HLDG CO LTD
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AI Technical Summary

Problems solved by technology

Although the above-mentioned engine warm-up adjustment method can theoretically improve the starting efficiency of the engine, it is difficult to operate in practice due to the complicated steps of the method

Method used

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  • Rapid warming-up method for gasoline engine
  • Rapid warming-up method for gasoline engine

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0039] Example 2 Low temperature startup calibration data test in plateau (altitude) environment

[0040] Engine model: 4 cylinders

[0041] Engine displacement: 1.2 liters

[0042] Test site: Tibet

[0043] Test time: July to August (a total of 60 days)

[0044] Local altitude: average 5000M

[0045] Local temperature: average 18°C

[0046] Calibration process: load the control unit (ECU) to be calibrated on the car using the engine for experimental driving and data calibration. Data values ​​appropriate for the control unit (ECU) to control the engine in this environment are stored in the calibration data table.

[0047] Calibration data results: In this test environment, the four calibration values ​​required by the present invention are obtained: the warm-up correction value of the engine operating point is 0.5367; the warm-up correction value of the relative altitude is 1.2967; The deactivation value is 1.004; the warm-up passivation value without traction control s...

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Abstract

The invention provides a fast warming method for a gasoline engine, which comprises the following steps: S1. a crankshaft position signal is obtained by a control unit through a crankshaft position sensor, and a cylinder which executes fast warming is determined by the crankshaft position signal; S2. when the engine is in a cool state, the crowding oil spout correction quantity of the fast warming is calculated by the control unit according to the determined rating data quantity and the collection of elevation factor quantity which influences the startup of the gasoline engine; S3. an execution command is sent by the control unit to the cylinder which executes fast warming; S4. when the ignition is successful, the warming process is completed. The method mainly greatly enhances the startup success ratio of the gasoline engine by correcting the oil spout time inside the cylinder of the gasoline engine to enable the gasoline engine to be faster into a normal operating work state and obtain optimal startup dynamic property; in addition the method and also greatly enhance the tail gas exhaust quality during the startup.

Description

technical field [0001] The invention relates to the technical field of gasoline-type engine control, in particular to a method for quickly warming up a gasoline-type engine when starting. Background technique [0002] When the gasoline engine is started, the temperature of the cylinder is much lower than the normal working temperature of the engine. Therefore, if the engine is started with a general control method, the engine will not be easily started, and will affect the quality of exhaust emissions when starting. The invention patent application with the publication number CN1225151A and titled engine warm-up adjustment discloses an engine warm-up adjustment method which includes controlling at least one operating parameter of the engine which is delivered to the engine since the start of the engine warm-up period function of at least some measure of energy, thereby improving combustion stability during said warm-up period, making critical adjustments to an operating par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D43/00F02D45/00F02D41/06
Inventor 李朝晖张步亮吕国伟
Owner CHINA VAGON AUTOMOTIVES HLDG CO LTD
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