Gm Global Technolgoy Operations, Inc.

Kevin A Sherwin

Layne K Wiggins

Wenbo Wang

Anthony L Marks

Robert J Horner

Antonio E Bartolomeo

Thomas F Porlick

A system according to the principles of the present disclosure includes a starter control module, an engine speed module, and a sensor diagnostic module. The starter control module generates a starter engage signal to engage a starter of an engine. The engine speed module determines a speed of the engine based on input from at least one of a camshaft position sensor and a crankshaft position sensor. The sensor diagnostic module selectively diagnoses a fault in the at least one of the camshaft position sensor and the crankshaft position sensor based on a rate of change in the engine speed before the starter engage signal is generated.

System and method for diagnosing a fault in a camshaft position sensor and/or a crankshaft position sensor

A system for an engine includes an edge detection module and a correlation calibration module. The edge detection module (i) detects edges of a camshaft of the engine using a camshaft position sensor, and (ii) detects edges of a crankshaft of the engine using a crankshaft position sensor. The correlation calibration module calibrates a correlation between the crankshaft and the camshaft based on the detected edges of the crankshaft and the camshaft, respectively.

System and method for calibrating engine crankshaft-camshaft correlation and for improved vehicle limp-home mode

Growing community of inventors

Farmington Hills, MI, United States of America

Kevin A Sherwin