Controls for variable displacement motor and motors
US4399886A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1980 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Dec 9, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/47
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control for a variable displacement motor which utilizes a motor speed sensitive signal for moving the displacement of the motor toward a zero displacement setting position including a device for generating a conditioned variable signal representative of motor speed, circuitry for receiving said signal and upon the signal reaching a predetermined intermediate value applying the signal to the control device for motor displacement for causing reduction in motor displacement and with various devices in the circuit for modifying the variable signal to provide a desired relation between motor speed and motor displacement. Utilization of such controls individually associated with plural variable displacement motors driving vehicle wheels and driven by one pump protects against spin-out of one of the wheels. The variable motor control is usable in a load-compensated system wherein at least one motor is associated with a drive at the front of the vehicle and another motor with the drive at the rear of the vehicle and with the control circuit having a valve responsive to the pressure condition in the system pressure lines connected between the pump and motors for differing adjustment of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.