![]() The invention of claim 2 and further comprising: means for disconnecting power to the solenoid valves when the mode select lever is in the neutral position.Ĥ. The invention of claim 1 wherein the transmission has a plurality of solenoid valves wherein the gear ratio selected is a function of the solenoid valves which are actuated and wherein the electrical transmission control signals cause actuation of selected solenoid valves.ģ. Means for providing the downshift signal in response to the upshift/downshift lever being in the downshift position andĬontrol means for providing the electrical transmission control signals to select one of the plurality of gear ratios as a function of the operating mode selected and the upshift and downshift signals.Ģ. Means for providing the upshift signal in response to the upshift/downshift lever being in the upshift position and Manually operable upshift/downshift means separate from the mode select means for providing upshift and downshift electrical signals, the upshift electrical signal representing a requested increase in gear ratio and the downshift electrical signal representing a requested decrease in gear ratio, wherein the manually operable upshift/downshift means comprises:Īn upshift/downshift lever having a normal position, an upshift position, and a downshift position Lever position sensing means for providing signals to the control means indicative of the position of mode select lever Manually operable mode select means for selecting one of a plurality of operating modes including a forward manual mode, a neutral mode, and a reverse mode, wherein the mode select means comprises:Ī mode select lever having a forward manual position, a neutral position, and a reverse position and For use in a vehicle having an engine and a transmission with a plurality of gear ratios which are individually selectable as a function of electrical transmission control signals, a transmission control system comprising: Push-button control for the operation of automobilesġ. Remote control systems for mechanical transmission gears Preselect automatic change speed gear shift Methods and devices for automatic transmissions for vehiclesĮlectrically controlled fluid actuated transmissionĪutomatic control of gearboxes and the like MECHANICAL LINKAGE FOR AUXILIARY DRIVE CONTROL IN VEHICLESĮLECTRICAL CONTROL APPARATUS FOR AN ENGINE AND VARIABLE TRANSMISSION APPARATUS Multi throw selector mechanism using pivoted links Handling device for slipping tubes on the mandrel of bending machinesĪutomatic transmission digital control systemĬombination transmission neutralizer and power train interlock systemĭigital electronic controller for power transmissionĮLECTRONICALLY CONTROLLED POWER TRANSMISSION Method for vehicle sub-transmission shift control Thereafter the control upshifts and downshifts the transmission according to engine RPM and the desired throttle set point.Ĭontrol of drive train noises during a shift operation of an automatic, variable speed transmission The operator then moves the mode select lever from the FM to the FA position. When the forward automatic mode is desired, the operator first moves the mode select lever to FM and operates the pulser lever until the desired maximum gear has been attained. ![]() Pulsing or holding the pulser lever rearward in the downshift position has a reverse effect. ![]() Holding the pulser lever forward in the upshift position gives sequential upshifts at predetermined time intervals. One upshift pulse causes the electronic control to actuate solenoid valves resulting in one gear shift upward. Higher/lower gears are obtained by moving the upshift/downshift pulser lever from its normal position to either an upshift position or a downshift position. Similarly, movement of the lever from N to R causes the control to actuate solenoid valves which provide a first reverse gear. Movement of the mode select lever from N to FM causes the electronic control to actuate solenoid valves which select a first forward gear. The mode select lever has a neutral (N) position, a reverse (R) position, a forward manual (FM) position, and a forward automatic (FA) position. The electrical control receives input signals from a mode select lever, an upshift/downshift pulser lever, an engine RPM sensor, a ground speed sensor, a clutch position sensor switch, and a throttle control lever. An electrical control provides output signals to a group of solenoid valves which control the gear ratio selected by a transmission.
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