Method and device for controlling the restarting of a vehicle provided with an automatic transmission
First Claim
1. A control method for automatic restart of a vehicle including an automatic transmission when a brake pedal is released or when an accelerator pedal is pressed by a driver, the method comprising:
- starting an engine during which engine torque begins to increase without being transmitted to wheels of the vehicle; and
progressively transmitting the engine torque to the wheels while being dependent on a torque instruction to be transmitted to the wheels which complies with an objective start time,wherein authorization to take torque via a coupling system of the engine and the transmission is given to a transmission processor by an injection processor of the engine at a time at which effective engine torque has reached the torque instruction to be transmitted to the wheels.
4 Assignments
0 Petitions
Accused Products
Abstract
A method for controlling automatic restarting of a vehicle including an automatic transmission, when the driver releases a brake pedal or pushes an accelerator pedal, the method including: a first phase of cranking an engine during which engine torque starts to increase without being transmitted to wheels of the vehicle, followed by a second launching phase during which the engine torque is gradually transmitted to the wheels, wherein the engine torque is controlled at a torque set value to be transmitted to the wheels, satisfying a launching time objective.
8 Citations
9 Claims
-
1. A control method for automatic restart of a vehicle including an automatic transmission when a brake pedal is released or when an accelerator pedal is pressed by a driver, the method comprising:
-
starting an engine during which engine torque begins to increase without being transmitted to wheels of the vehicle; and progressively transmitting the engine torque to the wheels while being dependent on a torque instruction to be transmitted to the wheels which complies with an objective start time, wherein authorization to take torque via a coupling system of the engine and the transmission is given to a transmission processor by an injection processor of the engine at a time at which effective engine torque has reached the torque instruction to be transmitted to the wheels. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A control device for automatic restart of a vehicle including an automatic transmission when a brake pedal is released or when an accelerator pedal is pressed by the driver, the control device comprising:
-
an engine start control module in an injection processor to control a start, to inform a transmission processor of engine speed, effective engine torque, target engine torque, target wheel torque, and authorization to take torque at a time at which coupling begins, wherein the transmission processor informs the engine start control module of a coupling coefficient of an engine and a transmission. - View Dependent Claims (7)
-
-
8. A control device for automatic restart of a vehicle including an automatic transmission when a brake pedal is released or when an accelerator pedal is pressed by the driver, the control device comprising:
-
an engine start control module in an injection processor to control a start, to inform a transmission processor of engine speed, effective engine torque, target engine torque, target wheel torque, and authorization to take torque at a time at which coupling begins, and an optimization module in the transmission processor for torque transmitted to wheels which transmits to the engine start control module of the injection processor a coupling coefficient of the transmission and a correction of a target engine torque instruction wherein the transmission processor informs the engine start control module of a coupling coefficient of an engine and a transmission, and wherein optimization of a transmission coefficient is carried out by mappings in accordance with the engine speed, the effective engine torque, the target wheel torque, a mass of the vehicle, and inclination.
-
-
9. A control device for automatic restart of a vehicle including an automatic transmission when a brake pedal is released or when an accelerator pedal is pressed by the driver, the control device comprising:
-
an engine start control module in an injection processor to control a start, to inform a transmission processor of engine speed, effective engine torque, target engine torque, target wheel torque, and authorization to take torque at a time at which coupling begins, and an optimization module in the transmission processor for torque transmitted to wheels which transmits to the engine start control module of the injection processor a coupling coefficient of the transmission and a correction of a target engine torque instruction wherein the transmission processor informs the engine start control module of a coupling coefficient of an engine and a transmission, and wherein the transmission processor comprises a transmission start control module.
-
Specification