Pump nozzle oil supply system and method thereof
A technology of fuel supply system and nozzle, which is applied in the direction of charging system, fuel injection pump, fuel injection device, etc., can solve problems such as difficulty in implementation, and achieve the effect of avoiding rotating parts and constant fuel injection pressure.
Inactive Publication Date: 2009-07-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
Because there is no rotating mechanism, it is difficult to realize the drive of the oil supply system of this kind of engine if the pump nozzle structure driven by the camshaft of the traditional engine is used, so a non-rotating mechanism-driven oil supply system is required to realize the hydraulic free piston engine. fuel supply
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[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0029] The general idea of the present invention is: use the hydraulic pressure to drive the movement of the hydraulic plunger in the plunger sleeve to replace the effect of the cam driving force, and use the electronically controlled two-position three-way solenoid valve in series in the hydraulic circuit to open and close Instead of the timing and phase of the cam, the fuel supply of the injector is controlled by controlling the power-on time of the two-position three-way solenoid valve.
[0030] figure 1 It is a schematic diagram of the pump nozzle oil supply system in the specific embodiment of the present invention. Such as figure 1 As shown, the hydraulic oil source system 1 is generated by hydraulic energy from a hydraulic free piston engine, and a two-position three-way solenoid valve 2 ...
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The invention discloses an oil supply system and method for a pump nozzle. The first oil channel is used to supply high-pressure oil, and the second oil channel returns high-pressure oil. A two-position three-way solenoid valve and a plunger sleeve are installed on the machine body. The through solenoid valve is connected with the first oil passage and the second oil passage, the other opening of the two-position three-way solenoid valve is connected with the third oil passage, the third oil passage is connected with the oil passage in the plunger sleeve, and the first plunger Installed in the plunger sleeve, the first plunger corresponds to the roller of the tappet, the lower end of the push rod is placed in the tappet, the upper end of the push rod is connected to the rocker arm through a hinge, and the rocker arm is connected to the upper end of the second plunger. The lower end of the plunger is connected to the fuel injector, and a return spring is ferruled on the second plunger. By adopting the technical solution of the present invention, the pump nozzle can be driven to supply oil without using rotating parts, and the engine can be guaranteed The fuel injection pressure is stable under various working conditions.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to a pump nozzle oil supply system and method. Background technique [0002] In the traditional pump nozzle oil supply system, the crankshaft of the engine drives the oil injection pump to work by the rotation of the cam on the oil supply camshaft driven by a pair of oil supply timing gears. In the fuel supply system of this structure, the fuel injection timing is guaranteed by the cam profile on the timing gear and the camshaft, the fuel injection regularity is guaranteed by the cam profile, and the fuel injection volume is determined by the plunger in the fuel injection pump. The pull rod drives the position of the plunger chute to determine. [0003] The hydraulic free piston engine is a new type of engine that integrates a reciprocating piston internal combustion engine and a plunger hydraulic pump. The engine converts the reciprocating motion of the piston in the cylinder dir...
Claims
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IPC IPC(8): F02M59/46
Inventor赵长禄张付军黄英刘波澜吴思进赵振峰
OwnerBEIJING INSTITUTE OF TECHNOLOGYGY