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Automatic downhill speed control system

A transmission system and speed technology, applied in the direction of control devices, external condition input parameters, driver input parameters, etc., can solve problems such as failure to disclose

Inactive Publication Date: 2012-09-12
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the '398 Bulletin fails to disclose a system for determining target velocity
The '398 bulletin also fails to disclose a system for controlling downhill speed through driveline retardation and transmission gear control

Method used

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  • Automatic downhill speed control system
  • Automatic downhill speed control system
  • Automatic downhill speed control system

Examples

Experimental program
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Embodiment Construction

[0023] Figure 1-3 A machine 10 equipped with an automatic downhill speed control system 100 ("control system 100") located on terrain 12 is shown.

[0024] figure 1 The machine 10 is shown on a flat upper surface 14 of the terrain 12, with the machine 10 traveling in a flat direction 16 above a flat speed 18. figure 2 The machine is shown on a downhill surface 20 with a slope 22 of the terrain 12, wherein the machine 10 is traveling in a downhill direction 24 with a downhill speed 26. image 3 The machine 10 is shown on the flat lower surface 28 of the terrain 12 with the flat speed 30 returning to the flat direction 16 below the machine 10.

[0025] The machine 10 may be embodied as an articulated truck (as shown) or any other vehicle or machine in a wide range of vehicles or moving machines. The machine 10 may include, for example: trucks, cars, road trucks, dump trucks, off-road trucks, earthmoving machines, wheel loaders, compactors, excavators, crawler tractors, bulldozers, s...

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PUM

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Abstract

A method for automatically controlling the downhill speed of a machine. The method includes establishing a target machine speed based on a current machine speed and determining whether at least one trigger condition including a grade greater than a predetermined threshold has been satisfied. If satisfied, the method activates a control system to control at least one of a powertrain retarder and a change in a transmission gear to prevent exceeding the target machine speed.

Description

Technical field [0001] The present invention relates to automatic downhill speed control, and more specifically to automatic transmission system blocking and gear shifting for controlling downhill speed. Background technique [0002] Machine operators usually use blocking devices and select gears to control the speed during downhill conditions. US Patent Application Publication 2008 / 0207398 (the '398 publication) discloses the use of an orientation sensor to control the retardation of the engine through the operation of a hydraulically driven fan. However, the '398 Bulletin failed to disclose a system for determining the target speed. The '398 Bulletin also failed to disclose a system for controlling downhill speed through transmission blockage and transmission gear control. Summary of the invention [0003] In one aspect, the present invention provides a method for automatically controlling the downhill speed of a machine. The method establishes a target machine speed based on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/11B60W10/196B60W30/18
CPCB60W10/06B60W10/11B60W10/196B60W30/18009B60W30/18072B60W2510/0638B60W2540/10B60W2540/12B60W2552/15
Inventor J·D·沙佩尔J·D·贝尔P·格拉哈姆R·亚当斯K·F·哈维S·汤普森J·V·多恩伯格
Owner CATERPILLAR INC