Patent Number: 7,707,984

Title: Method and system for controlling a low-voltage-powered plug for preheating a diesel engine air/fuel mixture

Abstract: The invention relates to a method for controlling a low-voltage-powered plug (2) for preheating a diesel engine (1) air/fuel mixture. The plug (2) is powered by pulses having a predetermined amplitude and duration, said amplitude being less than a maximum amplitude (PWM_MAX). The amplitude and duration of the voltage pulses powering the plug (2) are controlled as a function of first parameters including the duration of the preceding pulses and the duration between successive preceding pulses.

Inventors: Colet; Francois (Bois-Colombes, FR), Roth; Richard (Nanterre, FR), Palanque; Nicolas (Vicennes, FR)

Assignee: Renault S. A. S.

International Classification: F02P 19/02 (20060101)

Expiration Date: 5/04/12018