Internal combustion engine

Details Internal combustion engine Internal combustion engine

1991-12-19

1993-05-25

Wolfe, Willis R.

Internal-combustion engines

Multiple piston, common nonrestrictive combustion chamber

Four-cycle

123 51BD, 123 25A, 123 78F, F02B 2508, F02B 7528, F02B 7504, F02M 2502

Patent

active

052130673

ABSTRACT:
An internal combustion engine is provided having opposed pistons operating in axially spaced relation within common power cylinders. Opposed heads of the pistons define a space within which occurs a cycle of compression, ignition, combustion, and expansion. One piston controls exhaust ports, and the other piston controls air injection and fuel-air charge injection ports. Additional air injection ports, and associated supply passages or tubes, are provided to admit compressed air over the head of the exhaust piston to cool the exhaust piston head and also form a gas flow inhibiting region below the exhaust port, near the end of the power/exhaust stroke. Rotary valves control the in-flow of air and air-fuel charge to charging cylinders. Air injection ports have an optional improved construction to enhance air injection into the power cylinders. Throttle valves controlling flow of air into purge air charging cylinders are provided as an option. Water injection, particularly into the purge air, is a further option. An optional mechanism can be added for changing the phase relationship between the two opposed pistons in a common cylinder, whereby timing of opening of the exhaust port and the auxiliary air injection port can be changed according to changes in engine r.p.m.

REFERENCES:
patent: 2858816 (1958-11-01), Prentice
patent: 3847124 (1974-11-01), Kramer
patent: 4215660 (1980-08-01), Finley
patent: 4856463 (1989-08-01), Johnston

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