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Machine powertrain and method

A power train and machine technology, applied in the direction of motor vehicles, transmission devices, fluid transmission devices, etc., can solve problems such as undeveloped potential efficiency

Active Publication Date: 2014-07-30
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the systems and methods disclosed in the '321 patent are useful in improving a machine's fuel efficiency and smooth running, these benefits cannot be realized for all drive ratios of a machine, thereby not exploiting potential efficiencies

Method used

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  • Machine powertrain and method
  • Machine powertrain and method
  • Machine powertrain and method

Examples

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Embodiment Construction

[0017] The present invention relates generally to vehicular powertrains having automatic transmissions, and more particularly to powertrains including an automatic transmission and a torque converter capable of directly and selectively Connect the output of the engine to the transmission. The exemplary embodiments shown and described herein relate to wheel loaders, but it should be understood that the disclosed systems and methods have general applicability and adaptability to other types of vehicles, such as on-road and off-road trucks, backhoe loaders, machines, compactors, harvesters, motor graders, tractors / tractors, pavers, scrapers / scrapers, skid steers and tracked vehicles, and other vehicles.

[0018] figure 1 An outline of a wheel loader as one example for the vehicle or machine 100 is shown. figure 2 is a schematic diagram of the powertrain 200 of the vehicle 100 . Referring to these figures, vehicle 100 includes an engine frame portion 102 connected to a non-eng...

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PUM

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Abstract

A machine powertrain includes an engine operably connected to a torque converter and a transmission. A switch associated with the torque converter provides a locking signal indicative of a locked or unlocked condition of the torque converter. A throttle sensor associated with the throttle provides a throttle signal. An electronic controller receives the locking signal and the throttle signal, and controls operation of the engine at least partially based on the throttle signal and the locking signal. The electronic controller determines whether a locked or unlocked condition of the torque converter is present based on the locking signal, determines whether a part throttle operating condition or a full throttle operating condition is present based on the throttle signal, and selects a derated power curve when the part throttle operating condition is present and when the torque converter switches from the unlocked to the locked condition.

Description

technical field [0001] This patent disclosure relates generally to engine governors, and more particularly to engine governors for controlling an engine in a powertrain including a torque converter and a transmission. Background technique [0002] Powertrains having an engine connected to a transmission via a torque converter are known. A torque converter is a device, typically a fluid coupling, used to transfer rotational power from a prime mover, such as an internal combustion engine, to a rotating driven load. For land vehicles, the driven load may be a drive shaft connected via a differential or other gearing to one or more wheels of the vehicle or other drive mechanism. [0003] A characteristic of torque converters is their ability to multiply torque when there is a difference between the speed input to the torque converter from the engine and the output speed from the torque converter to the transmission. Some torque converters also include a lock-up mechanism that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/34F16H45/02F16H61/14
CPCB60W10/026B60W10/06B60W10/115B60W30/1882B60W2510/0233B60W2510/0604B60Y2200/412
Inventor A·霍C·斯万W·佩佩尔D·卡尔森S·瓦拉马卡尼
Owner CATERPILLAR INC