Variable displacement engine assembly including partial boost arrangement
First Claim
1. An engine assembly comprising:
- a boost mechanism in communication with an air source;
an engine structure defining a first cylinder bore, a second cylinder bore, a first intake port in communication with the boost mechanism and in communication with the first cylinder bore so as to only receive intake air from the boost mechanism during operation of the engine assembly, and a second intake port in communication with the air source and the second cylinder bore and wherein the second cylinder bore is isolated from the boost mechanism;
a first intake valve located in the first intake port;
a first valve lift mechanism engaged with the first intake valve;
a second intake valve located in the second intake port; and
a second valve lift mechanism engaged with the second intake valve and operable in first and second modes, the second intake valve being displaced to an open position by the second valve lift mechanism during the first mode and the second intake valve being maintained in a closed position by the second valve lift mechanism during the second mode.
4 Assignments
0 Petitions
Accused Products
Abstract
An engine assembly may include an engine structure, a first intake valve, a first valve lift mechanism, a second intake valve, a second valve lift mechanism, and a boost mechanism. The first intake valve may be located in a first intake port and the first valve lift mechanism may be engaged with the first intake valve. The second intake valve may be located in a second intake port and the second valve lift mechanism may be engaged with the second intake valve and operable in first and second modes. The second intake valve may be displaced to an open position during the first mode and may be maintained in a closed position during the second mode. The boost mechanism may be in communication with an air source and the first intake port and isolated from the second intake port.
-
Citations
20 Claims
-
1. An engine assembly comprising:
-
a boost mechanism in communication with an air source; an engine structure defining a first cylinder bore, a second cylinder bore, a first intake port in communication with the boost mechanism and in communication with the first cylinder bore so as to only receive intake air from the boost mechanism during operation of the engine assembly, and a second intake port in communication with the air source and the second cylinder bore and wherein the second cylinder bore is isolated from the boost mechanism; a first intake valve located in the first intake port; a first valve lift mechanism engaged with the first intake valve; a second intake valve located in the second intake port; and a second valve lift mechanism engaged with the second intake valve and operable in first and second modes, the second intake valve being displaced to an open position by the second valve lift mechanism during the first mode and the second intake valve being maintained in a closed position by the second valve lift mechanism during the second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method comprising:
-
providing a compressed intake air flow to a first intake manifold that is connected to a first set of cylinders via a plurality of first intake ports of an engine assembly so as to only receive compressed intake air during operation of the engine assembly; opening a plurality of first intake valves located in the plurality of first intake ports with a plurality of first valve lift mechanisms; providing a naturally aspirated intake air flow to a second intake manifold that is connected to a second set of cylinders via a plurality of second intake ports of the engine assembly, the second set of cylinders being isolated from the compressed intake air flow; operating a plurality of second valve lift mechanisms in a first mode where the plurality of second valve lift mechanisms open a plurality of second intake valve located in the plurality of second intake ports; and operating the plurality of second valve lift mechanisms in a second mode where the plurality of second valve lift mechanisms maintain the plurality of second intake valves in a closed position during engine operation. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification