SUPERCHARGER FOR AN ENGINE
First Claim
1. An engine system with turbocharger comprising:
- an exhaust manifold having plural independent exhaust passages, each of the exhaust passages being connected to an exhaust port of a corresponding engine cylinder;
a collective part formed by gathering said independent exhaust passages in said exhaust manifold or on a downstream side of said exhaust manifold;
an exhaust turbocharger connected to a downstream side of said collective part;
a variable exhaust valve for changing each passage cross-sectional area of said independent exhaust passages at an upstream side of said collective part; and
a controller for controlling said variable exhaust valve, wherein said controller is configured to perform independent exhaust throttle control for reducing a passage cross-sectional area of at least one of said independent exhaust passages below a maximum area with said variable exhaust valve at least in a predetermined low engine speed range in a supercharging operation range of said engine.
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Accused Products
Abstract
An engine system with a turbocharger is provided. The system may include an exhaust manifold having plural independent exhaust passages, each of the exhaust passages being connected to an exhaust port of a corresponding engine cylinder. The system may further include a collective part formed by gathering said independent exhaust passages in said exhaust manifold or on a downstream side of said exhaust manifold. The system may further include an exhaust turbocharger connected to a downstream side of said collective part. The system may further include a variable exhaust valve for changing each passage cross-sectional area of said independent exhaust passage at an upstream side of said collective part. The system may further include a controller for controlling said variable exhaust valve, wherein said controller is configured to perform independent exhaust throttle control for reducing a passage cross-sectional area of at least one of said independent exhaust passages.
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Citations
8 Claims
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1. An engine system with turbocharger comprising:
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an exhaust manifold having plural independent exhaust passages, each of the exhaust passages being connected to an exhaust port of a corresponding engine cylinder; a collective part formed by gathering said independent exhaust passages in said exhaust manifold or on a downstream side of said exhaust manifold;
an exhaust turbocharger connected to a downstream side of said collective part;a variable exhaust valve for changing each passage cross-sectional area of said independent exhaust passages at an upstream side of said collective part; and a controller for controlling said variable exhaust valve, wherein said controller is configured to perform independent exhaust throttle control for reducing a passage cross-sectional area of at least one of said independent exhaust passages below a maximum area with said variable exhaust valve at least in a predetermined low engine speed range in a supercharging operation range of said engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification