Method and apparatus avoiding blowdown losses in compound engine

Details Method and apparatus avoiding blowdown losses in compound engine Method and apparatus avoiding blowdown losses in compound engine

1978-09-11

1981-09-29

Koczo, Jr., Michael

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

60612, 123315, F02B 3700

Patent

active

042915350

ABSTRACT:
Power output of a compound engine is increased and fuel consumption per unit of output power is reduced by eliminating the blowdown losses heretofore associated with opening of exhaust valves or ports. Exhaust gases of a positive displacement engine stage drive a turbine or other gas-expansion stage, the two stages being mechanically coupled to jointly contribute to power output. The turbine stage may also drive a compressor to supercharge the positive displacement stage. Flow-regulating means in the exhaust gas passage between the two stages maintain exhaust gas passage pressure at a level corresponding to that which exists in the combustion chambers of the positive displacement stage at the time that exhaust valves or ports open. This avoids exhaust gas expansion between stages and reduces or eliminates the blowdown losses which would otherwise occur. Power losses at the positive displacement stage from the high back pressure are compensated for by the additional power recovered by the turbine stage as a result of the high expansion ratio at the turbine. Automatic control means may adjust the flow-regulating means in response to changes of engine operating conditions in order to maintain the optimum exhaust gas pressure.

REFERENCES:
patent: 2239922 (1941-04-01), Martinka
patent: 2769303 (1956-11-01), Lucia et al.
patent: 2819765 (1958-01-01), Chatterton
patent: 3007302 (1961-11-01), Vincent
patent: 3570240 (1971-03-01), Melchior
patent: 3961484 (1976-06-01), Harp

Affiliated with

Also associated with

Rating

Method and apparatus avoiding blowdown losses in compound engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus avoiding blowdown losses in compound engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus avoiding blowdown losses in compound engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1228414