Brake Assisted Control of an Engine Restart Event
First Claim
1. A method for restarting an engine of a vehicle, comprising the steps of:
- (a) engaging a gear of a transmission that driveably connects the engine and wheels of the vehicle;
(b) maintaining a current brake pressure greater than a reference brake pressure;
(c) initiating an automatic engine restart;
(d) using a timer to count down during a period of predetermined length;
(e) using a pump to produce a desired magnitude of brake pressure sufficient to suppress a wheel torque surge produced by restarting the engine and to hold the vehicle stationary;
(f) releasing the brake pressure.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for restarting an engine of a vehicle includes engaging a gear of a transmission that driveably connects the engine and wheels of the vehicle; maintaining a current brake pressure greater than a reference brake pressure; initiating an automatic engine restart; using a timer to count down during a period of predetermined length; using a pump to produce a desired magnitude of brake pressure sufficient to suppress a wheel torque surge produced by restarting the engine and to hold the vehicle stationary; and releasing the brake pressure if either the timer expires or a peak in engine speed occurs.
29 Citations
20 Claims
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1. A method for restarting an engine of a vehicle, comprising the steps of:
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(a) engaging a gear of a transmission that driveably connects the engine and wheels of the vehicle; (b) maintaining a current brake pressure greater than a reference brake pressure; (c) initiating an automatic engine restart; (d) using a timer to count down during a period of predetermined length; (e) using a pump to produce a desired magnitude of brake pressure sufficient to suppress a wheel torque surge produced by restarting the engine and to hold the vehicle stationary; (f) releasing the brake pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for restarting an engine of a vehicle, comprising the steps of:
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(a) engaging a gear of a transmission that driveably connects the engine and wheels of the vehicle; (b) if a current brake pressure is less than a reference brake pressure, using a pump to produce a desired magnitude of brake pressure sufficient to suppress a wheel torque surge due to restarting the engine and to hold the vehicle stationary; (c) maintaining brake pressure equal to or greater than the desired brake pressure; (d) initiating an automatic engine restart; (e) using a timer to count down during a period of predetermined length; and (f) releasing the brake pressure. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system for automatically restarting an engine of a vehicle, comprising:
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wheels for propelling the vehicle; wheel brakes for alternately holding and releasing rotation of the wheels; a brake system for pressurizing the wheel brakes; an engine; a transmission engaged in a gear through which the engine is driveably connected to the wheels; and a controller configured to maintain a current brake pressure greater than a reference brake pressure, initiate an automatically engine restart, set a timer to count down during a period of predetermined length, activate a pump to produce a desired magnitude of brake pressure sufficient to suppress a wheel torque surge produced by restarting the engine and to hold the vehicle stationary, and release the brake pressure. - View Dependent Claims (16, 17)
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18. A system for automatically restarting an engine of a vehicle, comprising:
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wheels for propelling the vehicle; wheel brakes for alternately holding and releasing rotation of the wheels; a brake system for pressurizing the wheel brakes; an engine; a transmission engaged in a gear through which the engine is driveably connected to the wheels; and a controller configured to activate a pump to produce a desired magnitude of brake pressure sufficient to suppress a wheel torque surge due to restarting the engine and to hold the vehicle stationary if a current brake pressure is less than a reference brake pressure, maintain brake pressure equal to or greater than the desired brake pressure, initiating an automatic engine restart, set a timer to count down during a period of predetermined length, and release the brake pressure. - View Dependent Claims (19, 20)
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Specification