GEAR SHIFTING ASSEMBLY FOR CHANGE SPEED TRANSMISSIONS

• Main Author: SAUER J,DT
• Format: Patent
• Language: English
• Published: 07.05.1974
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

A gear shifting assembly for changing the speed positions of a transmission in an automotive vehicle has a hydraulic gear selector motor whose piston rod is normal to the piston rod of a hydraulic gear shifting motor. The cylinder of the gear shifting motor has two chambers one of which receives pressurized fluid to engage a selected gear and the other of which receives pressurized fluid to disengage a gear. The flow of fluid to and from the two chambers is controlled by a twin check valve which has two discrete one-way valves, one for each chamber and two flow restrictors each connected in parallel with a different one-way valve. When the pressure of fluid in one of the chambers rises to a preselected value, the corresponding one-way valve opens the other one-way valve to allow for practically unimpeded flow of fluid from the other chamber.