Back to results
US 4,056,933 AGranted
Exhaust gas purifier in an internal combustion engine
AssigneeToyota Jidosha Kogyo Kabushiki Kaisha
InventorsHidetaka Nohira, Kiyoshi Kobashi
Life of this patent
Estimating the term…
Abstract
An exhaust gas purifier in an internal combustion engine having a plurality of cylinders and two separate exhaust manifolds. Two separate exhaust pipes are connected to the corresponding exhaust manifolds, one of the exhaust pipes being joined with the other exhaust pipe. The recirculated exhaust gas is extracted from the one exhaust pipe and is delivered into the air intake system. Secondary air is fed into the other exhaust manifold.
Claims6
An exhaust gas purifier in an internal combustion engine having a plurality of cylinders and an air intake system, comprising:
- a first exhaust manifold connected to at least one of said cylinders, said first exhaust manifold having an exhaust gas outlet;
- a second exhaust manifold connected to the remaining cylinders other than said at least one cylinder, said second exhaust manifold having an exhaust gas outlet;
- a first exhaust pipe fluidly connected to the exhaust gas outlet of said first exhaust manifold, said first exhaust pipe having an exhaust gas outlet;
- a second exhaust pipe fluidly connected to the exhaust gas outlet of said second exhaust manifold, the exhaust gas outlet of said first exhaust pipe being fluidly connected with said second exhaust pipe at a position remote from the exhaust gas outlet of said second exhaust manifold so that the exhaust gas in said second exhaust manifold does not enter into said first exhaust manifold;
- an exhaust gas passage between said remaining cylinders and the exhaust gas outlet of said second exhaust manifold;
- means for feeding secondary air into the exhaust gas passage between said remaining cylinders and the exhaust gas outlet of said second exhaust manifold;
- an exhaust gas passage between said one cylinder and the exhaust gas outlet of said first exhaust manifold;
- a recirculated exhaust gas inlet disposed in the exhaust gas passage between said one cylinder and the exhaust gas outlet of said first exhaust manifold;
- a recirculated exhaust gas outlet disposed in the air intake system;
- a recirculated exhaust gas conduit fluidly connecting said recirculated exhaust gas inlet with said recirculated exhaust gas outlet for delivering recirculated exhaust gas containing no secondary air therein from said recirculated exhaust gas inlet to the recirculated exhaust gas outlet;
- and
- means for controlling the flow rate of the recirculated exhaust gas in the recirculated exhaust gas conduit.
9 more elements
Dependencies are inferred from the claim text.