Internal combustion engines

Details Internal combustion engines Internal combustion engines

1979-12-10

1981-12-29

Feinberg, Craig R.

Internal-combustion engines

Multiple cylinder

Cylinders in-line

123 53A, 123188VA, F02B 7520, F01L 306, F02B 2512

Patent

active

043076874

ABSTRACT:
Each pair of piston and cylinders is twinned so that one acts as a primary or master piston and cylinder and the other as a secondary piston and cylinder. The pistons move in unison through the conventional four strokes of the Otto cycle. A transfer valve assembly is fitted into the head of the master cylinder and is ported to the secondary cylinder. It is adjustable so that it opens only when the power stroke is initiated and the pressure rises well above the compression pressure. When the transfer valve opens, the expansion takes place in both cylinders under any one of three conditions. (a) Inlet valve of the secondary cylinder is closed and sealed so that a vacuum is present as the piston descends. (b) The inlet valve of the secondary cylinder is operated to admit a restricted volume of air/fuel mixture to improve efficiency or (c) the inlet valve of the secondary cylinder is operated to admit a full charge of stratified lean air/fuel mixture which normally would not ignite but will be ignited by the high temperature gases transferred from the master cylinder.

REFERENCES:
patent: 1273834 (1918-07-01), Dumanois
patent: 3623463 (1971-11-01), Vries
patent: 4159699 (1979-07-01), McCrum

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