Alternator control systems and methods for vehicle deceleration
AssigneeGM Global Technology Operations LLC
InventorsJosef J. Correia, Christopher E. Whitney
Life of this patent
Estimating the term…
Abstract
A system for a vehicle includes a fuel control module and a voltage setting module. The fuel control module cuts off fuel to an engine during a deceleration fuel cutoff (DFCO) event. During the DFCO event, the voltage setting module monitors a brake pedal position, sets a desired voltage to a first predetermined voltage when a brake pedal is not depressed, and sets the desired voltage to a second predetermined voltage when the brake pedal is depressed. The second predetermined voltage is greater than the first predetermined voltage. A regulator generates a pulse width modulation (PWM) signal based on the desired voltage and applies the PWM signal to an alternator.
Claims20
A system for a vehicle, comprising:
- a fuel control module that cuts off fuel to an engine during a deceleration fuel cutoff (DFCO) event;
- and
- a voltage setting module that, during the DFCO event, monitors a brake pedal position, sets a desired voltage to a first predetermined voltage when a brake pedal is not depressed, and sets the desired voltage to a second predetermined voltage when the brake pedal is depressed,
- wherein the second predetermined voltage is greater than the first predetermined voltage, and
- wherein a regulator generates a pulse width modulation (PWM) signal based on the desired voltage and applies the PWM signal to an alternator.
A method for a vehicle, comprising:
- cutting off fuel to an engine during a deceleration fuel cutoff (DFCO) event;
- and
- during the DFCO event:
- monitoring a brake pedal position;
- setting a desired voltage to a first predetermined voltage when a brake pedal is not depressed;
- and
- setting the desired voltage to a second predetermined voltage when the brake pedal is depressed,
- wherein the second predetermined voltage is greater than the first predetermined voltage, and
- wherein a regulator generates a pulse width modulation (PWM) signal based on the desired voltage and applies the PWM signal to an alternator.
Dependencies are inferred from the claim text.