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CN-122003348-A - Control system for controlling a powertrain of a vehicle

CN122003348ACN 122003348 ACN122003348 ACN 122003348ACN-122003348-A

Abstract

Aspects of the invention relate to control systems (100), systems, vehicles (1), methods, and computer readable instructions. The control system is configured to receive (S410) a plurality of input parameters (142) including a vehicle speed signal (143) indicative of a vehicle speed, and a drive mode change signal (144) indicative of a need for a drive mode change between a forward drive mode (D) and a reverse drive mode (R). Then, based on the input parameters (142), it is determined (S420) whether the vehicle speed is greater than a speed threshold when a drive mode change is required. In response to determining that the vehicle speed is greater than the speed threshold, the driving mode change command signal (153) is delayed output (S440) until the vehicle speed is less than or equal to the speed threshold.

Inventors

  • ANDY JONES
  • Olivier rox

Assignees

  • 捷豹路虎有限公司

Dates

Publication Date
20260508
Application Date
20240920
Priority Date
20230921

Claims (15)

  1. 1. A control system for controlling a powertrain of a vehicle, the control system comprising one or more processors collectively configured to: receiving a plurality of input parameters including: A vehicle speed signal indicative of a vehicle speed, and A drive mode change signal indicating that a drive mode change between a forward drive mode (D) and a reverse drive mode is required; Determining, based on the input parameters, if the vehicle speed is greater than a speed threshold when the drive mode change is required; In response to determining that the vehicle speed is greater than the speed threshold, the output of the drive mode change command signal is delayed until the vehicle speed is less than or equal to the speed threshold.
  2. 2. The control system of claim 1, wherein the input parameter comprises a torque demand signal indicative of an amount of torque demanded of the powertrain of the vehicle; The one or more processors are collectively configured to determine whether an amount of torque required is above an allowable torque threshold, and In response to determining that the amount of torque requested is above the allowable torque threshold, the output of the drive mode command signal is delayed until the amount of torque requested is equal to or below the allowable torque threshold.
  3. 3. A control system according to claim 3, wherein the one or more processors are collectively configured to output a modified torque demand signal to one or more torque generating devices of the powertrain to reduce the amount of torque demanded to be at or below the allowable torque threshold.
  4. 4. A control system according to claim 2 or 3, wherein the allowable torque threshold is 1 Nm.
  5. 5. A control system according to any preceding claim, wherein the input parameter comprises a grade signal indicative of the grade of the road surface on which the vehicle is travelling, The one or more processors are collectively configured to determine whether the grade satisfies a grade braking condition that at least requires the grade to be greater in magnitude than a grade threshold, and In response to determining that the grade meets the grade braking condition, a braking torque request signal is output to request a braking torque.
  6. 6. The control system of claim 5, wherein the grade braking condition further requires the grade to be negative, and wherein the grade threshold is a downgrade grade threshold.
  7. 7. The control system of claim 5 or 6, wherein the downhill grade threshold is from 0% to-2%.
  8. 8. A control system according to claim 3 or any of claims 4 to 7 when dependent on claim 3, wherein the one or more processors are collectively configured to output a compensating braking torque demand signal to request compensating braking torque from a braking system to compensate for a reduction in the amount of torque from the one or more torque generating devices of the powertrain due to the modified torque demand signal.
  9. 9. A control system according to claim 8 when dependent on any of claims 5 or 6 or 7, wherein the one or more processors are collectively configured to output the compensating braking torque demand signal only if the grade is determined to be negative.
  10. 10. The control system according to any one of claims 5 to 9, wherein, The one or more processors are collectively configured to determine whether the grade is positive and greater in magnitude than an uphill grade threshold; In response to determining that the grade is positive and greater in magnitude than the uphill grade threshold, a blocking torque request signal is output to one or more torque-generative devices of the powertrain of the vehicle to request a blocking torque from the one or more torque-generative devices.
  11. 11. A control system according to any preceding claim, wherein the input parameters include a drive mode change time limit indicating a time limit for the drive mode change to occur; The one or more processors are collectively configured to determine whether the drive mode change instruction signal has been output within the drive mode change time limit, and In response to determining that the drive mode change instruction signal is not output within the drive mode change time limit, a drive mode change incomplete signal is output.
  12. 12. A system comprising a control system according to any preceding claim and a powertrain of a vehicle.
  13. 13. A vehicle comprising the system according to claim 12 or the control system according to any one of claims 1 to 11.
  14. 14. A method for controlling a powertrain of a vehicle, the method comprising: receiving a plurality of input parameters including: A vehicle speed signal indicative of a vehicle speed, and A drive mode change signal indicating that a drive mode change between a forward drive mode and a reverse drive mode is required; Determining, based on the input parameters, if the vehicle speed is greater than a speed threshold when the drive mode change is required; In response to determining that the vehicle speed is greater than the speed threshold, the output of the drive mode change command signal is delayed until the vehicle speed is less than or equal to the speed threshold.
  15. 15. Computer readable instructions which, when executed by a computer, are arranged to perform the method according to any of claims 14.

Description

Control system for controlling a powertrain of a vehicle Technical Field The present disclosure relates to a control system for controlling a powertrain of a vehicle. Aspects of the invention relate to control systems, vehicles, methods, and computer readable instructions. Background It is known to provide a vehicle with a powertrain having a plurality of drive modes, which may be operated in the plurality of drive modes. These drive modes generally include a forward drive mode "D" and a reverse drive mode "R". For example, in an automatic transmission vehicle, the drive modes generally include two or more of a forward drive mode "D", a reverse drive mode "R", a neutral drive mode "N", and a park drive mode "P". In some vehicles, a drive mode can be selected using a drive mode shift lever or a drive mode selector. The shift lever or selector may be a mechanical or electrical device for selecting one of the particular drive modes. The selection of the drive mode typically involves moving a shift lever or rotating a selector between positions representing each of the various modes. A typical sequence of automatic transmissions (forward/top to reverse/bottom for a gear lever, or clockwise for a rotary selector) is P, R, N, D. In this case, the driver of the vehicle can change between different drive modes by actuating the gear lever or the selector. When performing a maneuver, such as a parking maneuver, the driver may wish to change the direction of the vehicle, and thus must change the drive mode from the forward drive mode "D" to the reverse drive mode "R", or vice versa. However, if the vehicle is moving at a certain speed, there is a possibility that changing the drive mode may cause a driveline disturbance that the driver can feel. Driveline disturbances may negatively impact the smoothness of vehicle travel, resulting in a driver and/or their passengers feeling jerk or jerk when changing drive modes. Driveline disturbances may reduce driver and/or passenger comfort. It is an object of the present invention to address one or more of the disadvantages associated with the prior art. Disclosure of Invention Aspects and embodiments of the invention provide a control system, vehicle, method, and computer readable instructions as claimed in the appended claims. According to an aspect of the present invention, there is provided a control system for controlling a powertrain of a vehicle, the control system comprising one or more processors collectively configured to: receiving a plurality of input parameters including: a vehicle speed signal indicative of a vehicle speed, and A drive mode change signal indicating that a drive mode change is required; Determining whether the vehicle speed is greater than a speed threshold according to the input parameters; in response to determining that the vehicle speed is greater than the speed threshold, the output of the drive mode change command signal is delayed until the vehicle speed is less than or equal to the speed threshold. According to an aspect of the present invention, there is provided a control system for controlling a powertrain of a vehicle, the control system comprising one or more processors collectively configured to: receiving a plurality of input parameters including: a vehicle speed signal indicative of a vehicle speed, and A drive mode change signal indicating that a drive mode change between a forward drive mode and a reverse drive mode is required; determining, based on the input parameters, if the vehicle speed is greater than a speed threshold when a drive mode change is desired; in response to determining that the vehicle speed is greater than the speed threshold, the output of the drive mode change command signal is delayed until the vehicle speed is less than or equal to the speed threshold. The control system is configured to prevent a change in the drive mode when the vehicle is moving and the driver wishes to change the intended travel direction of the vehicle. By requesting that the change in drive mode be delayed, this may reduce the magnitude of the driveline disturbances (or completely mitigate driveline disturbances) that might otherwise be perceived by the driver. For example, when the drive mode is changed when the vehicle is at or below a minimum speed threshold in the forward direction (driving gear (D)) and the control system instructs the vehicle to travel in reverse (reverse gear (R)) or vice versa, the disturbance is alleviated. The delayed drive mode change may also reduce wear on components of the powertrain because angular momentum will be significantly reduced when the vehicle is at or below the minimum speed threshold compared to when the vehicle is moving above the minimum speed threshold. The control system includes one or more controllers collectively including at least one electronic processor having an electrical input for receiving an input signal, and at least one memory device electrically coupled to the at least one