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Control system for a vehicle

A vehicle and speed control technology, which is applied in the direction of control drive, vehicle energy storage, control devices, etc., can solve the problems of drive train recoil, drive train damage, driver discomfort, etc., and achieve the effect of eliminating recoil

Pending Publication Date: 2020-10-16
JAGUAR LAND ROVER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be problematic where the torque of an electric motor or electric machine must be switched from a negative to a positive value
In particular, in this case, there is a risk of so-called "backlash" or thud followed by vibration in the drive train, which can lead to driver discomfort and damage to the drive train

Method used

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  • Control system for a vehicle
  • Control system for a vehicle
  • Control system for a vehicle

Examples

Experimental program
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Embodiment Construction

[0032] figure 1 It is a pure electric vehicle 60 (BEV) ( Figure 4 A schematic diagram of the powertrain 10 shown in ). The vehicle's powertrain 10 has a battery 12 that provides electrical power to two electric motors or electric machines 14 , 16 . The first motor 14 is connected to the front wheels 18 of the vehicle 60 and provides driving torque or braking torque to the front wheels 18 . Similarly, the second motor 16 is connected to the rear wheels 20 of the vehicle 60 and provides driving or braking torque to the rear wheels 20 . The motors 14 , 16 are permanently (or directly) connected to the wheels 18 , 20 via respective drive shafts 17 , 19 .

[0033]The vehicle 60 has a creep speed control system or module 22 that implements a creep function by controlling the torque requested at the electric motors 14 , 16 under certain circumstances, as will be described in more detail below. In particular, creep speed control system 22 activates or performs creep functions bas...

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PUM

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Abstract

The present disclosure relates to a creep speed control system for a vehicle having at least one electric motor for providing torque to at least one vehicle wheel. The system comprises an input configured to receive a current speed signal indicative of a current speed of the vehicle; a creep speed control module that is configured to activate when the current speed of the vehicle crosses a predetermined threshold above a creep speed target value; and, an output configured to, upon activation of the creep speed control module, send a creep speed control torque signal to the at least one electric motor to control the vehicle speed in dependence on the creep speed target value, wherein the creep speed control torque signal is limited to a creep speed control filtered torque value less than acreep speed control maximum torque value.

Description

technical field [0001] The present disclosure relates to control systems for vehicles, and particularly, but not exclusively, to creep speed control systems for vehicles. Aspects of the invention relate to systems, methods, vehicles, and computer-readable storage media. Background technique [0002] Many vehicles with automatic transmissions, such as automobiles, include a so-called "creep speed" or idle function that keeps the vehicle at a relative Lower speed, eg 6km / h. In such vehicles, the automatic transmission includes a fluid coupling or slipper clutch that connects the output of the internal combustion engine to the wheels of the vehicle. Creep speed depends on engine idle speed and transmission ratio. Creeping may be particularly useful in situations where the driver needs to stop and start the vehicle multiple times, such as in traffic jams. The creep function enables the driver to control the movement of the vehicle using only the brake pedal, i.e. depressing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/08B60L15/20B60W30/18B60W50/00
CPCB60L15/2063B60W10/08B60W30/18063B60W30/18072B60W2050/0042B60W2050/0096B60W2520/10B60W2710/0666B60L15/2009B60L50/60B60L2240/12B60L2240/421B60L2240/423B60L2240/80B60L2260/28Y02T10/72Y02T10/64Y02T10/70B60W2710/083B60W30/143B60L2250/26
Inventor 马修·汉科克
Owner JAGUAR LAND ROVER LTD