Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1985-09-13
1987-01-27
Wolfe, Jr., Willis R.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123 65PE, 123 65W, 123 65A, F02B 7540
Patent
active
046387706
ABSTRACT:
A porting system for two-cycle internal combustion engines has two exhaust ports located on diametrically opposed sides of the cylinder. A pair of intake or by-pass ports are symmetrically positioned on each side of the two exhaust ports. The flow of fuel mixture is laminar and has a pattern which is inward and slightly upward from each intake port. As incoming streams collide, the gas flows upwardly and forms two mushrooms. Then, the flow is downwardly along the cylinder axis. The downward flow divides into two streams flowing radially outwardly from the center of the cylinder and out the two exhaust ports. With this flow pattern, there is a minimum of mixing of intake and exhaust gases, and as compared to the prior art, more unburned gas is retained in the cylinder to improve power output and reduce fuel consumption.
REFERENCES:
patent: 1967682 (1934-07-01), Ochtman, Jr.
patent: 2105717 (1938-01-01), Burn
patent: 2169652 (1939-08-01), Ljungstrom
patent: 2204296 (1940-06-01), Brooks
patent: 2638081 (1953-05-01), Spannhake
patent: 4329948 (1982-05-01), Fujikawa et al.
patent: 4373474 (1983-02-01), Schindler et al.
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