Chrysler Corporation

Michael R Lindsay

Hemang S Mehta

Keith B Carle

Thomas Glowczewski

Howard L Benford

Maurice B Leising

Gerald L Holbrook

Jay C McCombie

William R Kissel

The present invention is a method of fault protection for a microcomputer system. The method determines whether the system returns to a normal or special operating mode if a fault is detected by determining the microprocessor's past history before the fault occurred thereby allowing the microprocessor to get back on track in an appropriate manner.

Method of fault protection for a microcomputer system

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 method of determining the throttle angle position for an electronic automatic transmission system wherein a controller is programmed to determine the throttle angle position of the throttle in the engine and to detect any failures of the hardware used to determine throttle angle position and upon detecting a failure, providing a default throttle angle value to guarantee satisfactory operation.

Method of determining the throttle angle position for an electronic

A method of adaptively idling a transmission in an electronic automatic transmission system putting the transmission to 'neutral' when the engine is idling and the brakes are applied.

Method of adaptively idling an electronic automatic transmission system

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 method wherein a controller is programmed to determine the acceleration of the turbine in the torque converter to control transmission operation during a shift or gear change by counting the number of teeth during a predetermined cycle and dividing that tooth count by the actual time elapsed between the first and last tooth in an automatic transmission.

Method of determining the acceleration of a turbine in an automatic

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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Livonia, MI, United States of America

Michael R Lindsay