Chrysler Corporation

Keith B Carle

Thomas Glowczewski

Michael R Lindsay

Maurice B Leising

Gerald L Holbrook

William R Kissel

Thomas, Macomb Glowczewski

John I Gumaer

A method of determining the driver selected operating mode of an automatic transmission system wherein a controller is programmed to determine the driver selected operating mode of the transmission with a binary code transmitted from sensors sensing the position of a manually actuated shift lever.

Method of determining the driver selected operating mode of an automatic

The use of the input protection diodes in a microcomputer unit based control system in conjunction with a diode input circuit and an active pull-down network provided by a switched voltage regulator to protect the microcomputer unit from damage due to high voltages.

Use of diodes in an input circuit to take advantage of an active

An electronic controller, for use in an automatic transmission control system, for controlling solenoid-actuated valves to control the flow of hydraulic fluid throughout the transmission thereby allowing gears and friction elements to cooperate in response to various input signals, allowing the entire system to be adaptive to changing load demands placed on the vehicle.

Electronic controller for an automatic transmission

A circuit for the provision of low-voltage inhibit by using a reset output of a regulator with the enablement of a reset signal to the microcomputer unit in response to a 'key-on' signal and a reset condition of the switchable output of the regulator thereby providing an additional reset mode from the switchable voltage supply in the regulator that is gated out to reset the microcomputer unit only in response to a 'key-on' condition and a reset condition from the switchable voltage output of the regulator.

Utilization of a reset output of a regulator as a system low-voltage

A circuit to provide a shutdown relay driver circuit utilizing a self protecting high side switch configured such that if a short to ground occurs, a default mode is selected to provide a means to pull down the output voltage to ground regardless of the electrical state of the relay.

Shutdown relay driver circuit

An electronic driver circuit for the open loop control of the energization of a solenoid coil, forming part of an electromagnetic solenoid actuator valve, in response to a control pulse produced by a control circuit and where the predetermined schedules are a function of the inductance and resistance of the coil, the desired peak output voltage from the coil and the desired average holding current through the coil.

Open loop control of solenoid coil driver

A circuit to provide a regulated voltage output to low priority circuits in a microcomputer based control system from a switchable voltage output of a dual regulator such that the low priority circuits can be de-energized to reduce system current during various modes of system operation.

Dual regulator for reducing system current during at least one mode of

A crank position indicator circuit which senses the voltage across the starter relay coil such that the neutral start switch contacts NSI and S2 contacts are conditioned and fed to an inverter in order to have the inverter indicate when the ignition switch is in the crank position.

Circuit for determining the crank position of an ignition switch by

A method of determining the continuity of solenoids in an electronic automatic transmission system wherein a controller is programmed to determine solenoid continuity by checking for the presence of an inductive 'OFF' spike which results from an open circuit or a direct short to supply voltage from the solenoid of the solenoid-actuated valves.

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Hartland, MI, United States of America

Keith B Carle