EXHAUST GAS SYSTEM
First Claim
1. A cylinder head, comprising:
- at least two cylinders;
an individual exhaust duct coupled to each cylinder;
a combined exhaust duct coupling all individual exhaust ducts wherein the combined exhaust duct emerges from the cylinder head; and
a reservoir of fixed volume disposed in the cylinder head and coupled to the combined exhaust duct.
1 Assignment
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Accused Products
Abstract
An exhaust gas system configured for an internal combustion engine includes a cylinder head having at least two cylinders, a single exhaust duct emerging from the cylinder head, an individual exhaust duct provided between each cylinder and the single exhaust duct, and a reservoir of fixed volume integrated in the cylinder head and coupled to the single exhaust duct via a connecting duct. A reservoir valve is provided in the connecting duct in some embodiments. According to one embodiment, a method is disclosed in which the reservoir valve is commanded to an open position when flow through the single exhaust duct is large and commanded to a closed position when flowrate through the single exhaust duct is small. In some embodiments, a turbine, with a selectable volume upstream of the impeller, is coupled to the cylinder head.
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Citations
19 Claims
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1. A cylinder head, comprising:
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at least two cylinders; an individual exhaust duct coupled to each cylinder; a combined exhaust duct coupling all individual exhaust ducts wherein the combined exhaust duct emerges from the cylinder head; and a reservoir of fixed volume disposed in the cylinder head and coupled to the combined exhaust duct. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An exhaust gas system configured for an internal combustion engine, the exhaust system comprising:
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a cylinder head having at least two cylinders; a single exhaust duct emerging from the cylinder head; an individual exhaust duct provided between each cylinder and the single exhaust duct; and a reservoir of fixed volume integrated in the cylinder head and coupled to the single exhaust duct via a connecting duct. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. The system of claim 14 wherein the electronic control unit is electronically coupled to the turbine valve, the electronic control unit commanding the turbine valve to the first position when flowrate through the single exhaust duct is small and commanding the turbine valve to the second position when flowrate through the single exhaust duct is large.
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15. A method to control an exhaust gas system, the method comprising:
opening a reservoir valve disposed in a connecting duct between a combined exhaust duct and a reservoir in response to flowrate through the combined exhaust duct exceeding a predetermined flowrate, the reservoir valve, the reservoir, and the combined exhaust duct all being fluidly coupled in a cylinder head. - View Dependent Claims (16, 17, 18, 19)
Specification