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Motorcycle fuel oil system control method

A fuel system and control method technology, which is applied in the direction of fuel injection control, electrical control, engine control, etc., can solve the problems of unguaranteed service life of the oil pump, increase of system load, energy waste, etc., to avoid fuel temperature rise, Reduce system load and save power

Inactive Publication Date: 2017-03-29
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

[0004] However, during the running of the motorcycle, the fuel supply required by the engine is different according to the external temperature and load status. When the fuel supply required by the engine is small, the fuel pump still runs at a constant speed, so that a large number of The fuel needs to be discharged back to the fuel tank through the pressure regulating valve or the oil pump, which consumes extra power of the system, increases the system load, and causes a waste of energy. The high-load operation of the oil pump for a long time, it has been verified by experiments that after 2000 hours of continuous operation, the maximum flow attenuation exceeds 20%, resulting in the service life of the oil pump not being guaranteed

Method used

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  • Motorcycle fuel oil system control method
  • Motorcycle fuel oil system control method
  • Motorcycle fuel oil system control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, using the above method, the following table 1 (also called calibration table 1) is obtained. Table 1 records the percentage value of the actual fuel demand in different working hours when the fuel pump is running at a constant speed at different temperatures.

[0026] Table 1

[0027]

[0028]As shown in the above table, when the air temperature sensor detects that the real-time atmospheric temperature is -10 degrees, and the vehicle controller (ECU) detects that the real-time working time of the fuel pump is 200 hours, then the vehicle controller (ECU) according to the table 1. When the temperature is -10 degrees, the actual fuel demand accounts for the percentage of the fuel supply when the fuel pump is running at a constant speed for 200 hours. The value of 60% is the time duty cycle of the ground wire connected to the fuel pump. Duty cycle control of the pump.

Embodiment 2

[0029] Embodiment 2, using the above method, the following table 2 (also called calibration table 2) is obtained. Table 2 records the percentage of the actual fuel demand in different working hours when the fuel pump is running at a constant speed under different throttle openings. value.

[0030] Table 2

[0031]

[0032] As shown in the table above, when the throttle position sensor detects that the real-time throttle opening is 15%, and the vehicle controller (ECU) detects that the real-time working time of the fuel pump is 1000 hours, then the vehicle controller (ECU) according to In Table 2, the throttle opening is 15%, and the actual fuel demand accounts for the percentage value of the fuel supply when the fuel pump is running at a constant speed for 1000 hours. Time to duty cycle control of the fuel pump.

[0033] In order to facilitate the expression and description of the chart above, only the relationship between temperature and fuel pump duty cycle is analyzed ...

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Abstract

The invention discloses a motorcycle fuel oil system control method. The method is characterized in that before control, the actual fuel oil quantity demand of an engine under different working conditions is tested to obtain the percentage of the actual fuel oil quantity demand from the oil supply quantity of a fuel oil pump under the constant-speed running, and the percentage is recorded in an ECU (Engine Control Unit); a ground wire of the fuel oil pump is connected to a control end of the ECU, and the control end of the ECU can control the connection and disconnection of the ground wire; when in control, the current running condition of the motorcycle is detected through the ECU, and the percentage, recorded in the ECU, of the corresponding actual fuel oil quantity demand from the oil supply quantity of the fuel oil pump running at a constant speed under the condition, is taken as the duty ratio of time of the control end to communicate with the ground wire of the fuel oil pump; the actual oil supply quantity of the fuel oil pump is controlled to fit the fuel oil quantity demand of the engine under the working condition. The motorcycle fuel oil system control method has the advantages that the fuel oil pump can be controlled according to the outside temperature and the opening degree of an accelerator, then the fuel oil supply quality of the engine can be adjusted, and the system load is reduced, thus the electricity can be saved, and the fuel oil temperature can be prevented from increasing, and as a result, the safety is high.

Description

technical field [0001] The invention relates to the technical field of motorcycle fuel systems, in particular to a method for controlling the motorcycle fuel system. Background technique [0002] The working process of the motorcycle's fuel system is: after the fuel pump is powered on, the fuel is pressurized through the fuel pump, and then a constant pressure is formed in the oil circuit through the pressure regulating valve (for example, 2.5bar, and the excess fuel is discharged back to the fuel tank through the pressure regulating valve or the oil pump) supply system. When the fuel injector valve is opened, high-pressure fuel can be injected into the intake manifold to form a mist-like oil beam, so that the fuel and air can be fully mixed. When the valve is opened, the mixed gas enters the combustion chamber under the action of negative pressure, and is ignited by the spark plug after compression to provide work for the engine. After the combustion is completed, the exha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30
CPCF02D41/3082F02D2200/0625F02D2200/0404F02D2200/70
Inventor 周向东赵明成
Owner 力帆科技(集团)股份有限公司