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Engine speed control system for work vehicle

A technology of engine speed and control system, which is applied in the direction of engine control, machine/engine, mechanical equipment, etc. It can solve the problems of engine output speed increase, achieve the effect of weakening slipping, getting rid of slipping state easily, and improving control

Active Publication Date: 2009-12-02
KUBOTA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the output speed of the engine will rise unnecessarily by the operation of the input device despite being in a parked state

Method used

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  • Engine speed control system for work vehicle
  • Engine speed control system for work vehicle
  • Engine speed control system for work vehicle

Examples

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Embodiment Construction

[0030] Next, as an example of the best mode for implementing the present invention, an embodiment in which the engine speed control system for a work vehicle according to the present invention is applied to a tractor, which is an example of a work vehicle, will be described with reference to the drawings.

[0031] figure 1 is the overall side view of the tractor. This tractor has an engine 1 mounted on its front. The rotational power output by the engine 1 is transmitted to a pair of left and right front wheels via a clutch (not shown) that interrupts the rotational power, a transmission device (not shown) built into a transmission case 2 also serving as a frame, etc. 3 and the rear wheel 4, and the power take-off shaft 5 protruding from the rear portion of the gearbox 2 toward the rear. A steering wheel 6 for front wheel steering, a driver's seat 7 , etc. are provided at the rear of the tractor to form a boarding and driving section 8 , and a cab (cabin) 9 covering the boar...

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PUM

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Abstract

The present invention provides an engine speed control system for a work vehicle which has a foot accelerator controller for carrying out foot accelerator control based on a pedal sensor, a hand accelerator controller for carrying out hand accelerator control based on a lever sensor, a manually operated input device, storage means for storing a predetermined engine speed, and a constant rotation controller for carrying out constant rotation control in which the engine speed stored in the storage means is used as the target rotational speed on the basis of an input to the input device. The constant rotation control is carried out when the input device has been operated in the case that the engine speed that corresponds to the output of the lever sensor is greater than an idling speed, and the constant rotation control is terminated when the input device is operated in the case that the engine speed that corresponds to the output of the lever sensor is equal to or less than the idling speed.

Description

technical field [0001] The present invention relates to an engine speed control system for a work vehicle, which has: a function of executing footaccel control with the engine speed corresponding to the output of a pedal sensor as a target speed; A function of hand accel control in which the engine speed corresponding to the output of is a target speed; and a function of performing constant rotation control with a pre-stored engine speed as a target speed based on an input operation to a human-operated input device. Background technique [0002] As the above-mentioned engine rotation speed control system for a work vehicle, Japanese Patent Application Laid-Open No. 1-195933 discloses a system that performs constant rotation control prior to hand acceleration control by turning on a switch as an input device. . In this system, when the power transmission from the engine is cut off and the accelerator lever is in the idling position in a parked state, if the input device is o...

Claims

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Application Information

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IPC IPC(8): F02D11/10
Inventor 西荣治冈部伸行吉川研治
Owner KUBOTA LTD
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