Power plants – Pressure fluid source and motor – With control means for structure storing work driving energy
Patent
1988-08-01
1990-01-09
Look, Edward K.
Power plants
Pressure fluid source and motor
With control means for structure storing work driving energy
60417, 60487, 180165, 180307, F16D 3102
Patent
active
048919411
ABSTRACT:
A stored energy-type propulsion system for a vehicle employing a free piston engine-pump hydraulically connected to a drive motor, which in turn connects to the vehicle wheels. The hydraulic connection between the engine-pump and the drive motor includes a large-capacity pressure accumulator which is normally isolated from the system, and which is opened for communication with the system to supply pressure fluid to the drive motor only under conditions demanding peak operating pressure for limited time durations. An auxiliary accumulator of significantly smaller capacity is also connected to the hydraulic connection. This auxiliary accumulator is normally in open communication with the hydraulic connection to function as a cushion to minimize pressure fluctuations so that the system can operate in an ON-OFF cycle whereby the engine-pump can run for a large number of pumping cycles during the "ON" part of the cycle, and then be stopped for an equivalent number of cycles during the "OFF" part, during which the auxiliary accumulator is capable of driving the drive motor at the steady-state vehicle condition. The auxiliary accumulator can be immediately isolated from the hydraulic connection so that the system can respond to a sudden demand for increased power, such as due to a significant depression in the vehicle accelerator pedal.
REFERENCES:
patent: 4098144 (1978-07-01), Besel et al.
patent: 4215545 (1980-08-01), Morello et al.
patent: 4741410 (1988-05-01), Tunmore
patent: 4760697 (1988-08-01), Heggie et al.
patent: 4813510 (1989-03-01), Lexen
Look Edward K.
Williamson Mark A.
LandOfFree
Free piston engine-pump propulsion system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Free piston engine-pump propulsion system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Free piston engine-pump propulsion system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-139145