Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1978-03-21
1980-03-25
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123 59EC, 123 75B, 123 75C, F02M 2506
Patent
active
041944720
ABSTRACT:
Disclosed is a multi-cylinder engine having auxiliary valves in addition to intake and exhaust valves. A common exhaust gas passage is formed in the cylinder head and is connected to each of cylinders via the corresponding branches. Each of the auxiliary valves is arranged in a respective branch and opens at a time of the latter half of the exhaust stroke and at the end of the intake stroke, so that the auxiliary valve of one cylinder opens in synchronization with the opening operation of the auxiliary valve of another cylinder. The valve lift or the opening duration of the auxiliary valves of said one cylinder and another cylinder which are arranged adjacent to each other is set so as to be less than that of the auxiliary valves of said one cylinder and another cylinder which are not arranged adjacent to each another.
REFERENCES:
patent: 3702111 (1972-11-01), Weaving et al.
patent: 3785355 (1974-01-01), Toepel
patent: 4109625 (1978-08-01), Kawamura et al.
patent: 4116189 (1978-09-01), Asaga
patent: 4134381 (1979-01-01), Little
Amano Masuo
Tanahashi Toshio
Burns Wendell E.
Toyota Jidosha Kogyo Kabushiki Kaisha
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