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Method and device for controlling drive power in a motor vehicle

A technology of motor vehicles and power, applied in the field of computer programs, can solve the problems of reducing fuel efficiency, not allowing vehicle speed, etc., and achieve the effect of improving noise and emission levels

Active Publication Date: 2021-11-23
SCANIA CV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the vehicle speed is limited by a speed limiter that sets an upper speed limit for the vehicle speed, it is not allowed to increase the vehicle speed above the upper speed limit
If traveling near the upper speed limit, increasing the maximum power available from the powertrain will not result in an increase in vehicle speed, but only in additional noise and reduced fuel efficiency

Method used

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  • Method and device for controlling drive power in a motor vehicle
  • Method and device for controlling drive power in a motor vehicle
  • Method and device for controlling drive power in a motor vehicle

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Embodiment approach

[0050] Emergency vehicles travel in geographical areas with a speed limit of 50km / h. Emergency vehicles are equipped with a speed limiter that reduces the currently effective upper speed limit v lim Set to 50km / h. Emergency vehicles are also equipped with a kick-down switch that can be activated by fully pressing the accelerator pedal, which requires some extra force. Define the velocity threshold v th is 47km / h, above this speed threshold, when the speed limiter is in the active state, in response to the activation of the kickdown switch, the action of the change is triggered, and the speed upper limit v lim Set to 50km / h. Define the first trigger condition, if the speed upper limit v lim Below the maximum permissible speed limit v of the speed limiter max , then the first trigger condition is considered to have been met. A second trigger condition is further defined, if the driver fully presses the accelerator pedal for at least three seconds, the second trigger condit...

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Abstract

A method and apparatus for controlling drive power from a powertrain of a motor vehicle including a kickdown switch, wherein activation of the kickdown switch triggers a default action that temporarily requests an increase in the maximum power available from the powertrain, the method comprising: - identifying (101) that a speed limiter is active at the speed at which the vehicle speed is set, - comparing (102) the current vehicle speed with a predefined speed threshold below the upper speed limit, - if the current vehicle speed is above speed threshold and the speed limiter is active, a modified action is triggered (103) in response to activation of the kickdown switch.

Description

technical field [0001] The present invention relates to a method and apparatus for controlling drive power from a powertrain of a motor vehicle. The invention also relates to a computer program, a computer readable medium and a motor vehicle. Background technique [0002] Many motor vehicles are equipped with a kick-down switch for allowing the driver to temporarily request an increase in maximum power from the motor vehicle's powertrain, particularly if the motor vehicle has an automatic transmission or an automatically operated manual transmission (tec) case. The kickdown switch is usually activated by pressing the accelerator pedal more than 100 percent (which requires some extra force) or by pressing the accelerator pedal quickly. Activation of the kickdown switch may result in a shift to a lower gear resulting in higher engine speed, temporarily increasing the engine torque limit or connecting an additional power source such as an electric motor. In overtaking and si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/20
CPCF16H59/20B60W2540/103B60W30/146B60W2520/10B60W50/10F16H61/16F16H2061/0234F16H2061/0237F16H2061/0244
Inventor M·雅格布松S·雅各布松V·林德罗特M·欧恩
Owner SCANIA CV AB
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