Distributor-type fuel injection pump
A distributor-type fuel injection pump is described comprising: (a) a pump body including a rear portion and a head portion. The rear portion has a first bore and the head portion has a second bore extending in alignment with the first bore; (b) a drive shaft rotatably mounted in the first bore via at least two bearings; (c) a feed pump disposed in the pump body adjacent to the rear portion and connected in driven relation to the drive shaft, there being defined between the feed pump and the head portion a cam chamber; (d) a plunger slidably mounted in the second bore and defining between the second bore a pump working chamber; (e) a cam disposed in the cam chamber and connecting the drive shaft with the plunger so as to cause the latter to take rotational and reciprocating motions simultaneously, in unision with the rotation of the drive shaft; (f) a magnetic valve disposed on the head portion for opening and closing a fuel passage communicating with the pump working chamber; (g) a pair of oil seals mounted around the drive shaft and disposed on opposite sides of the feed pump; (h) the rear portion further having a first passageway communicating with the first bore between the two bearings for introducing a lubrication oil into a space defined between the first bore, the drive shaft and the bearings; (i) the drive shaft having at least one second oil passageway extending diametrically therethrough and opening at opposite ends to one of the bearings, and a third oil passageway extending axially therein and communicating the second oil passageway with the cam chamber; and (j) a bypass passage bypassing the cam chamber and communicating a discharge side of the feed pump with an inlet side of the fuel passage of the magnetic valve.
- Assignee:
- Diesel Kiki Co., Ltd., Tokyo
- Patent Number(s):
- US 4697565
- OSTI ID:
- 5977307
- Resource Relation:
- Patent File Date: Filed date 27 Dec 1985
- Country of Publication:
- United States
- Language:
- English
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