Stepped transmission with hydraulic actuator for motor vehicle - has electronic safety feature which inhibits actuation before completion of engagement of manually selected reverse gear

作者: Blumenstein Fritz , Pruess Ludwig Dipl Ing , Uhlig Guenter Dipl Ing

DOI:

关键词: Cylinder (engine)Mechanical engineeringTransmission (telecommunications)Completion (oil and gas wells)Electric controlDrivetrainPistonControl theoryNon-circular gearHydraulic cylinderEngineering

摘要: A hydraulically actuated sliding piston (36) enables a gear-shifting sleeve (9) to be positioned in two directions before reverse gear engagement wheel (10) is moved by mechanical positioner (43) coupled the selector (44). The selection sensed an electric control unit (48) which operates slide valve (27) hydraulic lines (37,38) both ends (S1,S2) of double-acting cylinder. When selected system passes through neutral with actuator inhibited. ADVANTAGE - Erroneous ratio changes, forward movements and stresses on drive train are excluded.