Method and system for controlling a vehicle during a downhill start

A technology for vehicles and vehicle operation, applied in vehicle components, braking action starting devices, brakes, etc., to solve problems such as damage to the main clutch

Active Publication Date: 2021-08-27
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be a problem when attempting to perform an upshift from a crawler or first gear to a higher gear and the drive wheels will be acting on the transmission output shaft through the axle differential
The rotational speed and torque applied to the transmission via the output shaft can severely damage the master clutch during improper gear changes

Method used

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  • Method and system for controlling a vehicle during a downhill start
  • Method and system for controlling a vehicle during a downhill start
  • Method and system for controlling a vehicle during a downhill start

Examples

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Embodiment Construction

[0042] figure 1 An exemplary vehicle provided with a vehicle control system according to an embodiment of the present invention is shown. figure 1 A vehicle 100 is shown, such as a tractor-trailer vehicle, having an electronically controlled internal combustion engine 110 coupled to a transmission 120 via a clutch mechanism 121 . It should be noted that if figure 1 The vehicle shown in is just one of the possible applications for the systems and methods of the present invention. The present invention can be implemented in any type of commercial or industrial vehicle that includes the vehicle speed control system described herein.

[0043] The transmission 120 in this example is a mechanical automatic transmission, but could alternatively be an alternative suitable transmission connected to an output shaft 122 coupled to a drive axle 123 which drives a pair of drive wheels 124 . Vehicle 100 includes at least two axles, such as steerable axle 127 and at least one rear drive a...

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PUM

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Abstract

The present invention relates to a method and apparatus for controlling a vehicle (100) during a downhill start. The vehicle includes: service brakes (131a, 131b; 132a, 132b; 33a, 133b); an engine (119); and a transmission (120) disposed between the engine and at least one drive axle (123), wherein the service The brakes, engine and transmission are controlled by an electronic control unit (140). The method includes: recording that the vehicle is on a downhill grade; recording an action from a driver indicating a request to start the vehicle; controlling the service brakes to apply the service brakes after the request for a predetermined time before beginning a controlled release of the service brakes The vehicle remains stationary; the gradual release of the service brake is controlled in response to the detected at least one first vehicle operating parameter; and the service brake is released upon detecting that a predetermined threshold of at least one second vehicle operating parameter has been reached.

Description

technical field [0001] The present invention relates to a method and system for controlling a vehicle during a downhill start using the service brakes. [0002] The invention can be applied to heavy vehicles such as trucks, articulated trucks, buses and construction equipment, which may be manned or unmanned. Although the invention will be described with respect to a heavy vehicle, the invention is not limited to this particular vehicle, but may also be used in other vehicles such as articulated dump trucks, wheel loaders and other construction machinery. Background technique [0003] When a heavy vehicle is driven off in demanding conditions such as steep downhill grades, the operator must take extra care to avoid problems and vehicle damage. Starting a vehicle on a steep negative grade requires the operator to pay special attention to the operation of the vehicle's brakes and transmission, especially when the vehicle is carrying a high load, to avoid uncontrolled accelera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/17B60T8/18B60T8/32
CPCB60T8/1708B60T8/1887B60T8/323B60T2201/04B60T7/045B60T2201/06B60W30/18054B60W30/18118B60W30/192
Inventor 尼克拉斯·奥贝格安德斯·埃里克松
Owner VOLVO LASTVAGNAR AB
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