Water-cooled two stroke engine having exhaust port timing contro

Internal-combustion engines – Engine speed regulator – Responsive to deceleration mode

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123 65PE, 123378, F02B 7502

Patent

active

043334318

ABSTRACT:
A water-cooled two stroke engine including a cylinder formed with an exhaust port which is adapted to be cyclically closed by a piston reciprocating in the cylinder. The exhaust port is provided at the upper portion with a port timing control valve which is operated to control the port timing in accordance with the engine speed by a piston-cylinder type actuator. The actuator is adaped to be operated by the engine cooling water pressure and has an operating pressure chamber at one side of the piston and a compensating pressure chamber at the other side. The cooling water supply passage has a flow restriction and the pressure upstream of the restriction is introduced into the operating pressure chamber and that downstream of the restriction into the compensating pressure chamber.

REFERENCES:
patent: 906884 (1908-12-01), Huff
patent: 1358812 (1920-11-01), Anderson
patent: 2369397 (1945-02-01), Kostenick
patent: 3643639 (1972-02-01), Bier
patent: 3751921 (1973-08-01), Blomberg
patent: 4121552 (1978-10-01), Mithuo et al.
patent: 4202297 (1980-05-01), Oku et al.
patent: 4285311 (1981-08-01), Iio

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