2-path hydromechanical transmission system and method of producing the same
US5139465A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1991 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Sep 26, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2047/045
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A two-path hydromechanical transmission system used in a crawler-type vehicle and a method of controlling this transmission system. Excellent maneuverability and high degree of running course steadiness at low tramming speed, as well as high power transmission efficiency at high tramming speed, are obtained by the use of hydraulic pumps and motors of capacities smaller than those of known systems. The transmission system has a power transmission line including independent left and right hydraulic pumps 2, 3 driven by an engine 1 mounted on a vehicle and motors 4, 5 and reduction planetary gear trains 200, 250 having reduction gear trains 100, 150 for transmitting the output torques of said hydraulic motors to left and right driving wheels. The transmission system also has an additional power transmission line including a reduction gear device 300 for distributing the output torque of said engine 1 and said reduction planetary gear trains 200, 250 for transmitting the output torques of said reduction gear device to said left and right driving wheels. This transmission system is controlled in different modes for tramming at low and high tramming speeds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.