Altronic, Inc.

Gm Global Technolgoy Operations, Inc.

Gary A Kleinfelder

Joseph M Lepley

James R Yurgil

Kurt Alfred Wellenkotter

David R Wade

John F Vangilder

Mark V Casarella

An in-head compressed air start-up system for an internal combustion engine comprises an absolute angular position detector for the crankshaft outputting an electrical signal indicative of the angular position, a computer for storing a table of the firing order of the cylinders and the angular position of the crankshaft at which each piston reaches a desired angular position relative to top dead center (TDC), wherein the computer means compares the signal indicative of angular position of the crankshaft to the firing order table and generates a plurality of signals sequentially open and close solenoid valves to cause rotation of the crankshaft.

Air starter and electronic control therefor

In a capacitive discharge ignition system there being a first circuit detecting the voltage across the storage capacitor marking the onset of discharge of the storage capacitor, a second circuit detecting the voltage across the storage capacitor marking the substantially complete discharge of the storage capacitor, a third circuit for measuring the time between the events marked by the first and second circuits, and a fourth circuit for analyzing the measured time to determine conditions in the ignition system.

Diagnostic system for capacitive discharge ignition system

A diagnostic for an internal combustion engine exhaust gas treatment means includes a series of enabling conditions for modelling temperature and operational stability of the treatment means and includes first and second stage tests alternately applied on an engine air/fuel ratio cycle-by-cycle basis in accord with the diagnosed performance of the treatment means using post-converter oxygen sensor information. When the treatment means performance is diagnosed as being degraded close to a failed condition, the first stage is disabled and the more statistically rigorous second stage is activated to closely scrutinize converter performance using a two phase approach for false alarm protection.

Catalytic converter diagnostic

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Mercer, PA, United States of America

Gary A Kleinfelder