Piezoelectric hydraulic control valve

摘要: A hydraulic control valve having a piezoelectric actuator comprises an expansible sleeve loosely received within bore of the housing, with one end thereof being fixedly or stationarily mounted relative to housing and other expansibly bore. slidable first piston is urged against sleeve. This floatingly supports actuator, which supported by second slidably coupled member operable cooperate seat open close inside fuel passage communicating inlet port outlet port. The linear expansion due change in ambient temperature causes displace direction together thereby so that occurring opposite similar counterbalanced whereby piston, serving as output maintained at constant distance respect regardless temperature. Such compensation structure enabling precise positioning ensures improved injection timing quantity system for internal combustion engine.