EXHAUST SYSTEM FOR VARIABLE CYLINDER ENGINE
First Claim
1. An exhaust system for a variable cylinder engine comprising:
- a variable cylinder engine having an activation cylinder group operating normally and a deactivation cylinder group wherein a fuel supply is stopped under a particular condition;
an activation side exhaust pipe connected to the activation cylinder group;
a deactivation side exhaust pipe connected to the deactivation cylinder group;
a gathering section connected to downstream ends of the activation side exhaust pipe and the deactivation side exhaust pipe;
a sub-catalyst disposed in the activation side exhaust pipe; and
a main catalyst disposed at the gathering section, wherein;
the main catalyst is formed such that gas passing therethough is partitioned into flows independent of each other in a flow path direction; and
the activation side exhaust pipe and the deactivation side exhaust pipe are connected in a mutually independent state to the main catalyst.
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Accused Products
Abstract
An exhaust system for a variable cylinder engine for assuring purification of exhaust gas without increasing the number of catalysts and an intake system for purifying blow-by gas. The exhaust system includes an activation side exhaust pipe connected to an activation cylinder group that operates normally. A deactivation side exhaust pipe is connected to a deactivation cylinder group wherein fuel supply is stopped under a particular condition. A gathering section is connected to downstream ends of the activation side exhaust pipe and the deactivation side exhaust pipe with a sub-catalyst disposed in the activation side exhaust pipe and a main catalyst disposed at the gathering section. The main catalyst is formed wherein gas passing therethrough is partitioned into flows independent of each other in a flow path direction. The activation side exhaust pipe and the deactivation side exhaust pipe are connected in a mutually independent state to the main catalyst.
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Citations
20 Claims
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1. An exhaust system for a variable cylinder engine comprising:
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a variable cylinder engine having an activation cylinder group operating normally and a deactivation cylinder group wherein a fuel supply is stopped under a particular condition; an activation side exhaust pipe connected to the activation cylinder group; a deactivation side exhaust pipe connected to the deactivation cylinder group; a gathering section connected to downstream ends of the activation side exhaust pipe and the deactivation side exhaust pipe; a sub-catalyst disposed in the activation side exhaust pipe; and a main catalyst disposed at the gathering section, wherein; the main catalyst is formed such that gas passing therethough is partitioned into flows independent of each other in a flow path direction; and the activation side exhaust pipe and the deactivation side exhaust pipe are connected in a mutually independent state to the main catalyst. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An intake system for a variable cylinder engine comprising:
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a variable cylinder engine having an activation cylinder group activated normally and a deactivation cylinder group wherein fuel supply is stopped under a particular condition; and throttle bodies connected to the activation cylinder group and the deactivation cylinder group, respectively, and having an intake passage, the intake system comprising; an upstream side intake passage provided on the upstream side of the throttle bodies and having a single chamber, wherein; a partition wall for partitioning the chamber into a space on the activation cylinder group side and a space on the deactivation cylinder group side is provided in the upstream side intake passage; and a blow-by gas returning pipe connects an internal space of the variable cylinder engine and the space on the activation cylinder group side to each other. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification