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Machine control system implementing speed-based clutch modulation

A mechanical control system, clutch technology, applied in the direction of clutch, control device, mechanical equipment, etc., can solve the problems of increasing the cost and complexity of the system, not being optimal, and cumbersome operators.

Active Publication Date: 2009-07-29
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the device in the '581 patent can improve the control of the impeller clutch, it is still not optimal
That said, storing multiple impeller clutch pressure curves in memory may add cost and complexity to the system
Also, because the system is manually activated, it can be cumbersome for the operator
Also, the system still has some delay associated with machine operation at engine speeds below high idle, so the continuity of operation experienced by the operator at varying engine speeds may be less than expected

Method used

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  • Machine control system implementing speed-based clutch modulation
  • Machine control system implementing speed-based clutch modulation
  • Machine control system implementing speed-based clutch modulation

Examples

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Embodiment Construction

[0014] An exemplary machine 10 is shown in FIG. 1 . Machine 10 may embody a moving machine performing some type of work associated with an industry such as mining, construction, agriculture, transportation, or any other industry known in the art. For example, machine 10 may be a dozing or material handling machine such as a wheel loader, an off-road haul truck, a motor grader, or any other suitable dozing machine. Machine 10 may alternatively embody an on-highway purpose-built truck, a people-carrying vehicle, or any other work-performing machine. Machine 10 may include, among other components, a power source 12 , a torque converter assembly 14 , a transmission 16 operably connected between torque converter assembly 14 and traction device 18 , and an operator station 20 .

[0015] Power source 12 may produce a power output having both torque and rotational speed components (that is, power = torque x speed, where speed may be, for example, the rotational speed of a shaft), and...

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PUM

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Abstract

The present invention discloses a machine control system for use with a machine having a power source and a transmission, in particular for implementing clutch alignnment based on speed. The machine control system may have a clutch configured to connect an output of the power source with an input of the transmission. The machine control system may also have a sensor configured to generate a signal indicative of a speed of the power source, and a controller in communication with the clutch and the sensor. The controller may be configured to vary an actuating force of the clutch based on the signal.

Description

technical field [0001] The present invention relates generally to a machine control system, and more particularly, to a machine control system for implementing speed-based engine clutch regulation. Background technique [0002] Machinery, including on- and off-road haul and specialty trucks, wheel loaders, motor graders, and other types of heavy machinery, typically includes a multi-speed, two-way, mechanical transmission. A torque converter is a fluid coupling that increases and / or absorbs torque fluctuations transmitted between a machine's engine and traction means by allowing slippage between the engine output shaft and the transmission input shaft. The torque converter assembly includes an impeller clutch for allowing the operator some freedom to determine slippage between the engine output shaft and the torque converter (ie, impeller) input shaft. The impeller clutch allows high engine speeds while limiting the amount of torque that is transferred into the torque conv...

Claims

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Application Information

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IPC IPC(8): B60K23/02F16D48/06
CPCB60W2510/0638B60W30/18054B60W10/02B60Y2200/415B60W2540/14B60W10/18
Inventor H-C·林P·D·哈根M·A·小施皮尔曼
Owner CATERPILLAR INC