Heat-insulating engine with swirl chambers

Details Heat-insulating engine with swirl chambers Heat-insulating engine with swirl chambers

1992-03-13

1993-01-12

Nelli, Raymond A.

Internal-combustion engines

Precombustion and main combustion chambers in series

Having specific connecting passage means between...

123270, 123254, F02B 1902

Patent

active

051781093

ABSTRACT:
This invention relates to a heat-insulating engine with swirl chambers which reduces a throttle loss due to the communication ports and increases the speed of a vortex flow within swirl chambers. The heat-insulating engine with swirl chambers comprises small communication ports each with a small passage area and large communication ports each with a large passage area formed at the lower portions of the swirl chamber blocks constituting heat-insulating swirl chambers, and control valves provided to large communication ports. During the compression stroke, the control valves close the large communication ports, and open the same ports during the expansion stroke after fuel injection and on rise in pressure in the swirl chambers. Accordingly, during the compression stroke, air is sent into the swirl chambers at high speed via small communication ports to increase a vortex flow speed within the swirl chambers. During the expansion stroke, the large communication ports being open, combustion gas and flame are forced into the main combustion chambers from the swirl chambers to reduce a throttle loss.

REFERENCES:
patent: 2552657 (1951-05-01), Ziegler
patent: 3168083 (1965-02-01), Buchanan
patent: 4300497 (1981-11-01), Webber
patent: 4424780 (1984-01-01), Trucco
patent: 4854281 (1989-08-01), Harayama et al.
patent: 5054443 (1991-10-01), Kawamura
patent: 5069178 (1991-12-01), Kawamura

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