Daimlerchrysler Corporation

Chrysler Group LLC

Michael Ray Lindsay

Alan Richard Ward

Michael D Hesse

Mary Joyce

Roger Thomas Douglas

Jesse Mitchell Saier

Madhu B Banerjee

Haitao Lin

David R DeRain

John R Dombrowski

The present disclosure provides systems for microprocessors to control a transmission power relay output with a latchdown mechanism in the event that either microprocessor decides it is appropriate to de-energize the relay. Advantageously, the present disclosure allows, for example, the transmission control to be performed by an existing dual microprocessor configuration instead of a custom-designed application specific integrated circuit (ASIC). The microprocessor-based software is more easily updated or changed to add functionality. Further, the present disclosure minimizes unique development with respect to electronic transmission control with a less complex design.

Systems for providing an automobile electronic transmission control monitoring unit with a latchdown mechanism

An apparatus for determining the validity of a data signal communicated between two microprocessors by a dual port RAM includes a sender for providing a data signal and an initialization status indicator and a dual port RAM in communication with the sender for receiving the data signal and the initialization status indicator. The RAM has a first location for storing the data signal and a second location for storing the initialization status indicator. The sender performs initialization on the RAM at the beginning of a data transfer cycle which includes a plurality of data transfer from the sender to a receiver. The sender updates the initialization status indicator as the initialization progresses. The receiver reads the initialization status of the RAM from the second location and subsequently reads the data signal from the first location in association with the initialization status of the RAM.

Dual port RAM communication protocol

A method includes diagnosing a solenoid circuit to determine if the circuit has begun to degrade. By measuring characteristics associated with the electrical waveform, it is determined if the characteristics of a solenoid circuit are different from the previously measured characteristics of the circuit, or of a known functioning circuit.

System for monitoring solenoid flyback voltage spike

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Commerce Township, MI, United States of America

Michael Ray Lindsay