Two-stroke otto cycle engines

Details Two-stroke otto cycle engines Two-stroke otto cycle engines

1989-04-26

1990-02-27

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60288, 123 65PE, F01N 328

Patent

active

049034820

ABSTRACT:
A two-stoke engine comprises a cylinder accommodating a piston and having an air inlet port and an exhaust port. The exhaust port communicates with an exhaust system which includes a reduction catalyst and an oxidation catalyst. The exhaust system includes two exhaust flow paths in parallel, the first of which includes the reduction catalyst and the second of which bypasses the reduction catalyst, the downstream ends of the two flow paths being connected together upstream of the oxidation catalyst. The exhaust port is controlled by the piston or by poppet valves so that as the piston performs its downstroke the initial flow of exhaust gas is substantially through the first flow path and the subsequent flow of exhaust gas is substantially through the second flow path.

REFERENCES:
patent: 1477994 (1923-12-01), Buchi
patent: 3579981 (1971-05-01), Gau
patent: 3810361 (1974-05-01), Weaving
patent: 4304207 (1981-12-01), Aihara

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