Method and apparatus for controlling the blade of a motorgrader
US5107932A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1991 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Mar 1, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F3/845
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method and apparatus are disclosed for controlling the cross slope angle cut by the blade of an articulated frame motorgrader being steered through a turn, operated in a straight frame mode, in a crabbed steering position and/or traveling in a non-horizontal plane. The blade angle is sensed and controlled such that the sensed blade angle is maintained substantially equal to a calculated blade angle. In a first embodiment, the blade angle calculation is performed using the equation: tan BS=(sin .tau.')(tan R)+(cos .tau.')(tan CS) where BS is the required blade slope angle of said blade relative to horizontal; .tau.' is a rotational angle of the blade with respect to the blade's direction of travel projected into horizontal; R is an angle between the blade's direction of travel and horizontal; and CS is the desired cross slope angle which is entered by an operator of the motorgrader. In a further embodiment, the blade angle calculation is performed using the equation: tan BS=(sin .tau.")(tan R')+(cos .tau.")(tan CS) where BS is the required blade slope angle of the blade relative to horizontal; R" is the rotational angle of the blade with respect to the blade's direction of travel …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.