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Rotor/engine speed control for cold planer

A technology for cold screed, rotor speed, used in engine control, machine/engine, electrical control, etc.

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

AI Technical Summary

Problems solved by technology

The controller is also coupled to the console

Method used

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  • Rotor/engine speed control for cold planer
  • Rotor/engine speed control for cold planer
  • Rotor/engine speed control for cold planer

Examples

Experimental program
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Embodiment Construction

[0026] figure 1 A cold screed 10 is shown comprising a frame 12 carried by a pair of front track assemblies 14 and a pair of rear track assemblies 16 for movement along a road surface. Frame 12 is supported on track assemblies 14, 16 by hydraulically actuated adjustable struts 18, 20 ( figure 1 Only two of the four track assemblies are shown), adjustable struts 18 , 20 extend between each pair of track assemblies 14 , 16 and frame 12 , respectively. Hydraulic cylinders 19 , 23 are used to raise and lower the cold screed 10 .

[0027] The rotor 21 is rotatably mounted to the frame 12 and has a casing 22 surrounding almost the body of the rotor 21 which needs to be exposed to the road surface 24 . The cutting or penetration depth of the cutting teeth (not shown) of the rotor 21 is controlled by appropriate extension or retraction of the adjustable struts 18,20 and cylinders 19,23. The cold screed 10 also includes an engine 26 as a power source, which can drive the rotor 21 vi...

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PUM

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Abstract

Cold planers (10) work in a variety of conditions where different rotor (12) speeds can be beneficial. The rotor (12) is connected directly to the engine (26) via a clutch (50) so the speed cannot be changed independent of the engine (26) speed. The control system disclosed herein enables the operator to quickly select from a plurality of different engine (26) / rotor (12) speeds. The engine (26) / rotor (12) speeds correspond to different machine applications. Each speed corresponds to a point on the torque map for the particular cold planer (10) that will offer acceptable machine performance for the particular application. If the operator inputs one of the plurality of different commands, a timer (48) is activated and movement of the cold planer (10) must take place within a predetermined time period or the engine (26) speed is reduced to the elevated idle speed where the clutch (50) is able to engage the rotor (12). The disclosed control system limits clutch (50) wear, fuel consumption and noise emissions. The disclosed control system is also operator friendly as there are no separate milling and travel modes. The control algorithms work for both milling and travel operations.

Description

technical field [0001] The present invention generally relates to systems and methods for controlling engine and rotor speeds of cold screeds to optimize performance and fuel efficiency. Background technique [0002] Cold screeds, also known as pavement profiling machines, road grinders or road levelers, are devices designed to renovate, remove, mix or reclaim material from asphalt or concrete pavements or similar surfaces. Cold screeds typically have multiple tracks or wheels that adjustably support and transport the machine horizontally along the road surface to be leveled. Cold screeds also have a rotatable screed rotor or cutter, which can be driven mechanically or hydraulically. Vertical adjustment of the cold screed relative to the road surface may be provided by hydraulically adjustable rods supporting the cold screed above its tracks or wheels. [0003] While the rotor is hydraulically driven, such hydroelectric motor systems are generally less efficient at deliver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/088E01C19/23
CPCF02D41/0205F02D41/022F02D11/105
Inventor D·H·基利昂A·J·克罗尔尼克C·M·斯蒂芬
Owner CATERPILLAR PAVING PROD INC