Chrysler Corporation

Chrysler Motors Corporation

Thomas Glowczewski

Keith B Carle

Michael R Lindsay

William R Kissel

Maurice B Leising

Gerald L Holbrook

Douglas C Frantz

Michael F Michel

John I Gumaer

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 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.

Method of determining the continuity of solenoids in an electronic

A circuit for throttle position sensor data shared between controller with dissimilar grounds and to provide reading the output of the throttle position sensor with one of the controllers by referencing the output to the ground of that controller to generate an absolute throttle position sensor reading; and reading the output of the throttle position sensor with another controller via a differential amplifier to generate a relative throttle position sensor reading.

Throttle position sensor data shared between controllers with dissimilar

In an idle speed control system for an engine equipped with a fuel/air mixture means and an air bypass means or movable throttle stop means, the idle speed can be quickly moved to the desired value by temporarily changing the spark advance and holding the changed spark advance until the air bypass system or movable throttle stop means has had a chance to respond to the various demands of the idle condition.

Growing community of inventors

Washington Township, MI, United States of America

Thomas Glowczewski