Super high-pressure diesel fuel injection pump
A technology for diesel engines and fuel injection pumps, which is applied in fuel injection pumps, mechanical equipment, engine components, etc., can solve the problems of difficult processing, high difficulty, and high requirements for plunger mating accuracy, and achieve the effect of high sealing and high safety.
Inactive Publication Date: 2010-01-27
汤燮铭
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Problems solved by technology
At present, the German BOSCH company represents the international advanced level. The emission standard of its common rail fuel system is within Euro III (National III). It adopts the traditional crankshaft, connecting rod, and crosshead structure, and its pump pressure stays below 130Mpa. It is very difficult to improve on the basis of 130Mpa. First of all, the precision of the plunger coupling is high and it is difficult to process, and it adopts the spring return point contact force transmission structure. Therefore, how to solve the problem of Euro IV (National IV) standard is imminent. There is still a long way to go to meet international emission standards
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[0011] See figure 1 , the present invention comprises housing 2, rotating shaft 1, plunger, pump head 8, oil inlet 18 and oil outlet 25, and plunger has two, is respectively plunger 9,19; , the ball shoes at one end of the plungers 9 and 19 cooperate with the circular arc surface of the swash plate 20 respectively; The blind end is connected to the cross chamber 11, and the two ends perpendicular to the plunger chamber 10 of the cross chamber 11 are respectively connected to the oil inlet 18 and the oil outlet 26 through the spherical valve assembly structure. The elastic sealing structure respectively includes guide sleeves 13, which are respectively sleeved on one end of the plungers 9 and 19. Inside the guide sleeves 13, the end faces of the plungers 9 and 19 are sequentially press-fitted with a blowout preventer ring 15 and an elastic piston 14. And connected by screws 12, the end surface of the guide sleeve 13 away from the cross cavity is sequentially press-fitted with ...
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The invention discloses a super high-pressure diesel fuel injection pump, which can output pressure of 160MPa, and has compact structure, small occupied space, moderate precision requirement, convenient processing and low manufacturing cost. The super high-pressure diesel fuel injection pump comprises a shell, a rotating shaft, a plunger piston, a pump head, an oil inlet and an oil outlet, and is characterized in that: the rotating shaft is sleeved with a swash plate; a ball head sliding shoe at one end of the plunger piston is matched with a cambered surface of a ring of the swash plate; an elastic sealing structure is adopted between the other end of the plunger piston and the pump head to form a plunger piston cavity; a blind end of the plunger piston cavity is connected with a crossed cavity; and two ends of the crossed cavity vertical to the plunger piston cavity are respectively connected with the oil inlet and the oil outlet through a ball valve component structure.
Description
(1) Technical field [0001] The invention relates to the technical field of ultra-high pressure fuel injection, in particular to an ultra-high pressure diesel engine fuel injection pump. (2) Background technology [0002] As the main power source widely used, the diesel engine has a similar overall structure, and the main difference is the fuel system and electronic control system, that is, the use of in-line mechanical pumps and electronically controlled common rail systems. At present, the German BOSCH company represents the international advanced level. The emission standard of its common rail fuel system is within Euro III (National III). It adopts the traditional crankshaft, connecting rod, and crosshead structure, and its pump pressure stays below 130Mpa. It is very difficult to improve on the basis of 130Mpa. First of all, the precision of the plunger coupling is high and it is difficult to process, and it adopts the spring return point contact force transmission struc...
Claims
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IPC IPC(8): F02M59/02
Inventor 汤燮铭
Owner 汤燮铭