Method For Multi-Operating Mode Control Of An Automated Transmission For A Motor Vehicle, In Particular For Idle Speed Runing With Inactivated Brake And Corresponding Device

• US 20080115993A1
• Filed: 09/06/2005
• Published: 05/22/2008
• Est. Priority Date: 09/10/2004
• Status: Abandoned Application

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: Roudeau, Frederic, Vermuse, Vincent, Bretheau, Jean
• Application Number:
  US11/575,041
• Publication Number:
  US 20080115993A1
• Time in Patent Office: Days
• US Class Current: 180/179
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 2710/105 Output torque
• CPC Class Codes: B60W 30/18063 Creeping
• CPC Class Codes: B60W 30/1819 Propulsion control with control means using analogue circuits, relays or mechanical links
• CPC Class Codes: F16H 2061/202 Active creep control for slow driving, e.g. by controlling clutch slip
• CPC Class Codes: F16H 61/20 Preventing gear creeping ; Transmission control during standstill, e.g. hill hold control

Abstract

A method for controlling automated transmission for a power train of a motor vehicle, including producing a first setpoint signal of a variable applicable to the vehicle wheels and including dynamic and static components formed taking into consideration input representative data of the motor vehicle characteristics, a drive'"'"'s wish, and an environment of the vehicle, in selecting, according to the input data, one mode from at least two different operating modes able to transmit the setpoint signal. One operating mode corresponds to a torque creeping mode for transmitting the setpoint signal when the motor vehicle runs with a speed lower than a predetermined threshold and the brake pedal thereof is inactivated.

Claims

1-7. -7. (canceled)

8. A method for controlling an automated transmission of a power train for a motor vehicle, comprising:

formulating a setpoint signal of a variable to be applied to wheels of the motor vehicle, the setpoint including a dynamic component and a static component formulated by taking account of input data representative of characteristics of the motor vehicle, of a desire of a driver, and of an environment of the motor vehicle; and

selecting, as a function of the input data, a mode from among at least two different operating modes, capable of delivering the setpoint signal, one of the two operating modes corresponding to a speed creeping mode configured to deliver the setpoint signal when the motor vehicle advances at a speed less than a predetermined threshold and when the brake pedal of the motor vehicle is inactivated.

9. The method as claimed in claim 8, wherein the speed creeping mode and/or a value of the setpoint delivered when the speed creeping mode is selected are determined as a function of a signal representative of a measured speed and/or of a signal representative of a target speed that the motor vehicle must reach.

10. The method as claimed in claim 9, wherein the speed creeping mode and/or a value of the setpoint delivered when the speed creeping mode is selected are determined as a function of a signal representative of the dynamic component of the setpoint undergoing application.

11. The method as claimed in claim 10, wherein the speed creeping mode and/or a value of the setpoint delivered when the speed creeping mode is selected are determined as a function of a signal representative of resistive torques applied to a wheel and that the motor vehicle must overcome so as to be able to move off.

12. A device for controlling an automated transmission of a power train for a motor vehicle, configured to deliver setpoint signals of a variable to be applied to wheels of the motor vehicle, the setpoint including a dynamic component and a static component, formulated by taking account of input data, delivered by an input block and including a list of parameters defining characteristics of the motor vehicle, a desire of a driver, and an environment of the motor vehicle, the device comprising:

a control block including at least two modules according to two distinct and predetermined operating modes, one of the modules corresponding to a speed creeping mode selected when the motor vehicle advances at a speed less than a predetermined threshold and when the brake pedal of the motor vehicle is inactivated; and

a selection module receiving signals originating from the input block and configured to deliver a selection signal for one of the modules as a function of the input data.

13. The device as claimed in claim 12, wherein the module corresponding to speed creeping mode comprises:

a calculation block configured to formulate a speed setpoint based on a measured speed of the motor vehicle, a target speed setpoint that the motor vehicle must reach, and an initialization signal,

correction means to perform a proportional and/or integral and/or derivative correction on the speed setpoint formulated by the first block and to deliver a corrected torque setpoint,

first means for initializing and adapting the speed setpoint to be corrected by the correction means performing an integral correction, as a function of the initialization signal and of a value of a dynamic torque setpoint undergoing application,

a filter configured to saturate and filter a raw dynamic torque setpoint in the speed creeping mode formulated based on the torque setpoints corrected by the correction means,

means for performing operations on variables delivered by the blocks included in the module corresponding to the speed creeping mode, and

means for delivering the static torque setpoint in the speed creeping mode based on the value of the dynamic torque setpoint in the speed creeping mode, a minimum torque quantity to be applied to a wheel, and a signal representative of resistive torques applied to the wheel and that the motor vehicle must overcome so as to be able to move off.

14. The device as claimed in claim 13, wherein the calculation block comprises:

second initialization means to initialize an intermediate variable, with a value of measured speed of the motor vehicle or a value of the speed setpoint formulated by the calculation block at a previous time,

saturation means to reduce a deviation between a target speed desired by the driver and the intermediate variable, and

means for performing operations on the variables delivered by the calculation block.