Automatic blade leveler right tilt-left tilt-null control and method

摘要

In one embodiment a dozer blade controller, which may comprise two-way, four-way, or six-way dozer blade position control such as, for example, a two-way control only for blade tilt. In one embodiment, a pulse width control is provided for use in a blade tilt electronic controller, which controls blade tilt independently of movement of the body of the bull dozer. And in another embodiment, a pulse width controller is operable to multiply and/or divide the width of a variable pulse by a preset multiplier factor or divider factor, e.g. by 100 or dividing by 100.

主权项

1. A right tilt, left tilt, null control for a dozer blade, comprising:
an electronic tilt sensor mounted to said dozer blade; an electronic tilt control operable to receive a signal from said electronic tilt sensor; an electrically operated hydraulic control responsive to said electronic tilt control; an adjustable hydraulic flow controller operable for selectively controlling an amount of hydraulic fluid flow to said electrically operated hydraulic control and an amount diverted bank to a hydraulic fluid tank; at least one limit switch to electronically limit a range of operation of said electronic tilt control whereby said at least one limit switch provides an electronically predetermined limit of said right tilt and said left tilt; and a null control operable to set a desired tilt angle for said dozer blade, whereby said electronic tilt control provides signals to said electrically operated hydraulic control unless said dozer blade is at said desired tilt angle, which is an electronic null position.