Variable-discharge high pressure pump

Details Variable-discharge high pressure pump Variable-discharge high pressure pump

1997-02-10

1999-09-28

Thorpe, Timothy S.

Pumps

Expansible chamber type

Electrically or magnetically actuated distributor

921711, 123446, 123495, F02M 3704

Patent

active

059576740

ABSTRACT:
A variable-discharge high pressure pump capable of facilitating the manufacturing and providing sufficient lubrication. The pump comprises a cam shaft provided with a cam surface by which a tappet displaces in accordance with the cam surface, a plunger connected to the tappet to reciprocate in accordance with the reciprocation of the tappet and accommodated in a cylindrical cylinder. Also included are a cylinder head having a contact surface brought into contact with one end surface of the cylinder. The cylinder head has a small-diameter recess portion made in the contact surface to be coupled to the cylinder and constitutes a pump chamber in conjunction with a head portion of the plunger. Further, the cylinder head holds a fuel introduction device for introducing external fuel into a fuel supply passage communicating with the pump chamber, a solenoid valve for opening and closing the fuel supply passage in accordance with an energization state thereto, and a fuel discharging device for discharging fuel compressed in the pump chamber. The cylinder is placed through a fixing device into contact with the cylinder head.

REFERENCES:
patent: 4526150 (1985-07-01), Guntert et al.
patent: 4597371 (1986-07-01), Wissmann et al.
patent: 5094216 (1992-03-01), Miyaki et al.
patent: 5307778 (1994-05-01), Hummel et al.
patent: 5771864 (1998-06-01), Morishita et al.

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