Throttle motor control protection system, throttle motor protection method and excavator

Abstract

The invention discloses an accelerator motor control and protection system, an accelerator motor protection method and an excavator. The accelerator motor control and protection system comprises a rotation speed calibration and protection unit, a gear shifting time-limiting protection unit and an accelerator overrun protection unit. The accelerator motor protection method comprises a rotation speed calibration and protection policy, a gear shifting time-limiting protection policy and an accelerator overrun protection policy, and an accelerator motor can be protected from the aspects of rotation speed calibration, gear shifting time limiting and accelerator overrun. The excavator comprises the accelerator motor control and protection system, and correspondingly has a rotation speed calibration and protection function, a gear shifting time-limiting protection function and an accelerator position overrun protection function, and therefore the accelerator motor is effectively protected.

Description

technical field [0001] The invention relates to the technical field of throttle motor protection, in particular to a throttle motor control and protection system, a throttle motor protection method and an excavator provided with the throttle motor control and protection system. Background technique [0002] At present, the engine throttle of the excavator is controlled by a special throttle control mechanism. The throttle control mechanism includes a throttle motor and a throttle cable (that is, a soft shaft of the throttle). The throttle motor drives the throttle cable to expand and contract, and the throttle cable drives the throttle arm to swing. , so as to realize the adjustment of the throttle size of the engine, and the throttle arm also sets the limit position corresponding to the limit speed of the engine. [0003] Existing excavators will carry out speed calibration for the gear of the excavator, that is, set a corresponding speed for the gear, and calibrate the cor...

AI Technical Summary

Problems solved by technology

However, in actual situations, due to the influence of many factors, the original certain speed range cannot be reached (for example, the engine cannot reach the maximum speed due to the wear of the engine itself, or the throttle position cannot be accurately controlled due to the vibration of the engine during operation. ), so that the deviation between the actual engine speed and the target speed cannot be eliminated by adjusting the throttle position or cannot be eliminated temporarily

However, since the excavator adopts the above-mentioned closed-loop control method, the throttle control mechanism will control the throttle motor to continue to work and repeatedly adjust the throttle position, thereby affecting the service life of the throttle motor and even causing damage to the throttle motor

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