ECCENTRIC SHAFT BYPASS VALVE CONSTRUCTION


BHE011011901T02

• An eccentric shaft bypass valve has been adopted to shorten the engine warm up period. The eccentric shaft bypass valve allows engine oil in the oil passage to escape at cold-engine start, maintaining a pressure in the eccentric shaft that prohibits injection of rotor cooling engine oil from the oil jet plugs until the engine is warmed up.

1
Engine oil temperature: 60°C {140°F} or above
2
Eccentric shaft bypass valve
3
Eccentric shaft
4
Rotor
5
Oil jet plug
6
Engine oil
7
Engine oil temperature: less than 60°C {140°F}
8
Oil pressure relief