Four range hydromechanical transmission

Details Four range hydromechanical transmission Four range hydromechanical transmission

1986-11-20

1988-07-05

Braun, Leslie A.

Machine element or mechanism

Elements

Gear casings

74682, F16H 4704

Patent

active

047546646

ABSTRACT:
A hydromechanical transmission provides four gear ranges, the first of which provides a reverse gear range and a low gear range, and the fourth of which is an overdrive range. The transmission utilizes either four or five planetary gearsets and four sequentially actuated clutches, two of which act as brakes. The hydraulic section uses a fixed displacement hydraulic unit and a variable displacement hydraulic unit which alternately act as a pump or a motor. The hydraulic section adds to or substracts from the mechanical gear ratio in a differential arrangement which also acts as range gearing to provide an infinitely variable transmission. Most or all rotating elements move as a unit at three operating points, idle, mid-second-gear, and direct drive, to reduce losses at typical operating points and allow a stepless transition to a locked direct drive.

REFERENCES:
patent: 3534632 (1970-10-01), Smith
patent: 3597997 (1971-08-01), Phillips
patent: 3597998 (1971-08-01), Ebert
patent: 3714845 (1973-02-01), Mooney, Jr.
patent: 3783711 (1974-01-01), Orshansky, Jr.
patent: 3897697 (1975-08-01), Chambers et al.
patent: 3969957 (1976-07-01), DeLalio
patent: 3979972 (1976-09-01), Sakai et al.
patent: 3982448 (1976-09-01), Polak et al.
patent: 4116089 (1978-09-01), Orshansky, Jr. et al.
patent: 4164156 (1979-08-01), Reed
patent: 4306467 (1981-12-01), Pollman
patent: 4341131 (1982-07-01), Pollman

Affiliated with

Also associated with

Rating

Four range hydromechanical transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Four range hydromechanical transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Four range hydromechanical transmission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2325856