Means controlling the driving ratio of a motor vehicle

Abstract

Abstract A MOTOR VEHICLE HAVING AN INTERNAL COMBUSTION ENGINE WITH A CARBURETOR, A THROTTLE CONTROL VALVE AND A TRANSMISSION SYSTEM. THE TRANSMISSION SYSTEM HAS ONE OR MORE VARIABLE DIAMTER BELT DRIVEN PULLEYS, EACH HAVING A BELT OF TRAPEZOIDAL CROSS-SECTION ASSOCIATED THEREWITH. EACH PULLEY HAS AN AXIALLY DISPLACEABLE HALF PULLEY AND A CYLINDER CONTROLLING THE VARIABLE HALF PULLEY HAS TWO CHAMBERS. A PISTON FIXEDLY SECURED TO THE PULLEY SHAFT SEPARATES THE CHAMBERS AND A THROW-OVER VALVE IS ASSOCIATED WITH THE PISTON CONTROLLING THE PRESSURE BELOW ATMOSPHERIC IN THE CHAMBERS CREATED BY THE INTAKE MANIFOLD OF THE ENGINE. THE THROW-OVER VALVE HAS TWO SELECTIVELY OPERABLE VALVE PORTIONS FOR SERVING THE RESPECTIVE CHAMBERS OF THE VARIABLE PULLEY CONTROL CYLINDER AND ELECTRICAL MEANS CONTROL THE PORTIONS IN DEPENDENCE ON THE DRIVING CIRCUMSTANCES OF THE MOTOR VEHICLE. IN ONE PREFERRED EMBODIMENT, THE TWO VALVE PORTIONS, WHICH ARE SOLENOID OPERATED, ARE RESPECTIVELY ACTUATED BY PREDETERMINED POSITIONS OF THE PIVOTAL THROTTLE VALVE WITHIN THE INTAKE MANIFOLD ADJACENT THE CARBURETOR, WHICH VALVE ACTUATES AN ATTACHED MICRO-SWITCH, AND THE OTHER BY A BRAKE-OPERATED SWITCH. IN OTHER EMBODIMENTS, CENTRIFUGAL SWITCHES MAY BE INCLUDED IN THE RESPECTIVE ELECTRICAL CIRCUITRY BY BEING INTERPOSED BETWEEN THE SOLENOIDS OF EACH VALVE PORTION OF THE THROW-OVER VALVE AND THEIR RESPECTIVE AFORESAID ACTUATING DEVICES. THESE LATTER CENTRIFUGAL SWITCHES ARE OPERATED ALSO IN ACCORDANCE WITH PREDETERMINED VEHICLE CONDITIONS, I.E. THE FIRST AS BY THE SPEED OF THE VEHICLE VIA ITS SPEEDOMETER CABLE OF SHAFT, AND THE OTHER RESPONSIVE TO PREDETERMINED ENGINE SPEED, WITH EACH BEING NORMALLY IN THE OPEN CONDITION BELOW CERTAIN PREDETERMINED R.P.M.''S, AND RESPECTIVELY THE FORMER SERVING TO IMPROVE THE SHIFT QUALITY, AND THE LATTER A CLEANER EXHAUST EMISSION.

Inventors

• 👤 Wilhelm F M Hendriks
• 👤 Petrus H Van Deursen

Bibliographic Details