A device for measuring the advance angle of oil supply by using the oil drop method and the pre-lift method at the same time

Abstract

The invention belongs to the technical field of diesel engines, and provides a device for measuring the advance angle of fuel supply by simultaneously adopting the drip method and the pre-lift method. The proposed device for measuring the advance angle of oil supply by using the drip method and the pre-lift method at the same time has a mounting body (4) with an axial through hole in the center; a fixed block (6) is arranged at the lower part of the axial through hole; A spring (5) is installed in the lower section of the hole, and the upper end of the spring (5) is in elastic contact with the upper end surface of the lower section of the axial through hole, and the lower end of the spring is elastically supported on the upper end surface of the fixed block (6); The lower end of the rod (2) extends out of the axial through hole and elastically touches the top surface of the high-pressure oil pump plunger (9); the upper end of the guide rod (2) extends out of the axial through hole, and a dial indicator is placed on the upper end surface (11); an oil outlet pipe (3) is installed on the side of the mounting body (4). The invention simultaneously measures the corresponding relationship between the advance angle of oil supply of the high-pressure oil pump and the lift of the plunger, thereby improving the reliability of fast and accurate detection and adjustment of the advance angle of oil supply.

Description

technical field [0001] The invention belongs to the technical field of diesel engines, and mainly relates to a device for measuring the advance angle of fuel supply by simultaneously adopting the oil drop method and the pre-lift method. Background technique [0002] The fuel supply advance angle refers to the crankshaft rotation angle corresponding to the distance from the top of the piston to the top dead center when the fuel injection pump starts to supply fuel to the cylinder. If the fuel supply advance angle is too small, the fuel supply timing will be delayed, which will cause incomplete combustion, high fuel consumption rate, difficult starting, insufficient power, black smoke from the exhaust pipe and other symptoms. If the fuel supply advance angle is too large, that is, the start of fuel supply time will be advanced, it will be difficult to start, the diesel engine will work roughly, the operation will be unstable, the power of the diesel engine will drop, it will e...

AI Technical Summary

Problems solved by technology

From the published materials, such as the application publication number: CN 103032177 A "A Diesel Engine Fuel Supply Advance Angle Adjustment Device", only the drip method is used, and the pre-lift method cannot be used to adjust the fuel supply advance angle at the same time, and the high pressure cannot be measured. Oil pump camshaft lift

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