Title: Exhaust gas recirculation system of a multi-cylinder internal combustion engine

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Amano, Masuo (Okazaki, JP)
Tanahashi, Toshio (Toyota, JP)

Application Number: 888733
Filing Date: 1978-03-21
Publication_date: 1980-03-25
Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota, JP)
Primary Class(es): 123/274 123/58.8, 123/262, 123/287, 123/308, 123/315
Other Classes:
US Patent Ref:

3702111	Nov, 1972	Weaving et al.	123/119.
3785355	Jan, 1974	Toepel	123/119.
4109625	Aug, 1978	Kawamura et al.	123/119.
4116189	Sep, 1978	Asaga	123/119.
4134381	Jan, 1979	Little	123/119.

Other Refs:
Primary Examiner: Burns, Wendell E.
Assistant Examiner:
Attorney: Kenyon & Kenyon