JPH01160161U

JPH01160161U -

Info

Publication number: JPH01160161U
Application number: JP5582588U
Authority: JP
Priority date: 1988-04-27
Filing date: 1988-04-27
Publication date: 1989-11-07
Anticipated expiration: 2003-04-27
Also published as: JPH0631170Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係わる電磁弁制御式分配型燃
料噴射ポンプの全体を示す縦断面図、第２図は電
磁弁および燃料逃がし通路を断面にして示す側面
図である。１０……ハウジング、１１……ボデイ、１２…
…ヘツド、１２ｘ……ボルト（固定具）、１６…
…バレル部（バレル）、２０……駆動シヤフト、
３０……プランジヤ、３１……燃料加圧室、４０
……カム機構、４１……カムデイスク、４３……
ローラホルダ、４４……ローラ、４５……スプリ
ングアツセンブリ、４６ａ，４６ｂ……スプリン
グ、４７……第１ばね座、４８……第２ばね座、
４９……係止リング、６０……燃料供給通路、７
０……燃料吐出通路、８０……吸入ポート、８１
……吐出ポート。 FIG. 1 is a longitudinal cross-sectional view showing the entire electromagnetic valve-controlled distribution type fuel injection pump according to the present invention, and FIG. 2 is a side view showing the electromagnetic valve and the fuel relief passage in cross section. 10...Housing, 11...Body, 12...
...Head, 12x...Bolt (fixing tool), 16...
... Barrel part (barrel), 20 ... Drive shaft,
30...Plunger, 31...Fuel pressurization chamber, 40
...Cam mechanism, 41...Cam disk, 43...
Roller holder, 44...roller, 45...spring assembly, 46a, 46b...spring, 47...first spring seat, 48...second spring seat,
49...Lock ring, 60...Fuel supply passage, 7
0... Fuel discharge passage, 80... Intake port, 81
...Discharge port.

Claims

[Claims for Utility Model Registration] (a) A hollow body with an opening at one end, a head fixed to the body so as to close the opening, a barrel part provided in the head, and an inner part of the barrel part. A housing including a fuel supply passage and a plurality of fuel discharge passages each having one end open. (b) A drive shaft that is supported by penetrating through a portion of the housing on the side opposite to the barrel portion, with one end protruding outside the housing and the other end facing inside the housing. (c) A plunger whose one end is inserted into the barrel part to form a fuel pressurizing chamber together with the barrel part, and whose other end is connected to the other end of the drive shaft so as to be able to transmit rotation and to be able to reciprocate in the axial direction. The plunger is formed with a discharge port that selects one of the fuel discharge passages and communicates it with the fuel pressurization chamber in the forward stroke, and a suction port that communicates the fuel supply passage with the fuel pressurization chamber in the return stroke. ing. (d) A cam mechanism that is housed in the housing and provides reciprocating motion in the axial direction to the plunger as the plunger rotates. This cam mechanism includes a roller holder, a roller rotatably supported by the roller holder, a cam disk connected to a plunger and in contact with the roller, and a spring that biases the plunger and cam disk toward the roller. There is. In the distribution fuel injection pump having the configurations (a) to (d) above, the cam mechanism includes a spring assembly including the spring, first and second spring seats, and a locking ring. , first, second
The spring seats are arranged at both ends of the spring, and the first spring seat extends from its periphery toward the second spring seat, and the locking ring is fixed to the extended end of the first spring seat. The outer diameter is smaller than the inner diameter of the extended end of the first spring seat and larger than the inner diameter of the locking ring, and the peripheral edge of the second spring seat is located closer to the first spring seat than the locking ring. A distribution type fuel injection pump characterized by: