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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