Fuel injection timing control device
A device is described which is attachable to the cam shaft of a fuel injection pump for an internal combustion engine for controlling injection timing of the pump. The device consists of: a cup-shaped cover open at one end and closed at the other by an end wall portion, the cover having a hole formed concentrically with the axis of the cover in the end wall portion and a driven gear disposed concentrically with the axis on the outside end face of the end wall portion for rotatably driving the cover around the axis when in mesh with a drive gear rotated by the engine; a hub disposed concentrically with the axis and rotatable relative to the cover, the hub including a pipe-shaped boss portion whose outer diameter is not larger than the hole. Ths boss portion has at one open end a connecting portion for detachable connection to the cam shaft and a flange integrally formed on the outer periphery of the boss portion. The flange is axially spaced from the boss portion open by a predetermined distance and has a side face slidably contacting the inner surface of the end wall portion of the cover; means for adjusting the phase angle of the hub to the rotation of the cover in response to an operating state of the engine. The adjusting means includes phase angle adjusting members rotatably disposed in the flange, and a pair of flyweight plates received in the cover and displaceable radially outwardly by contrifugal force, each of the flyweight plates having one side face slidably contacting the other side face of the flange; and a thrust plate disposed in the cover in the vicinity of the cover open end and being in contact with the other side face of the flyweight plates such that the thrust plate bears the thrust load of the plates.
- Assignee:
- Nippondenso Co., Ltd., Kariya
- Patent Number(s):
- US 4572144
- OSTI ID:
- 5828159
- Resource Relation:
- Patent File Date: Filed date 26 Mar 1984
- Country of Publication:
- United States
- Language:
- English
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