Claims
- 1. A noise control system for an engine having an air inlet and that operates in a first mode and a second mode, comprising:
a valve disposed in the air inlet; a support that holds the valve in the air inlet; and a resilient member operably coupled to the valve, wherein the resilient member has a biasing force that biases the valve to a closed position, and wherein the an air pressure characteristic during the second mode overcomes the biasing force to move the valve to an open position.
- 2. The noise control system of claim 1, wherein the valve is disposed in the air inlet to allow air to flow through approximately half of the air inlet when the valve is in the closed position.
- 3. The noise control system of claim 1, wherein the support comprises a shaft connected to the valve.
- 4. The noise control system of claim 1, wherein the support comprises at least one support protrusion integrally formed with the valve.
- 5. The noise control system of claim 1, wherein the resilient member is one selected from the group consisting of a coil spring and a leaf spring.
- 6. A noise control system for an engine having an air inlet and a plurality of cylinders, wherein the engine operates fewer than all of the cylinders in a first mode and operates all of the cylinders in a second mode, the noise control system comprising:
a valve disposed in the air inlet and movable between an open position where air is allowed to flow through substantially the entire air inlet and a closed position where air is allowed to flow through a portion of the air inlet; a support that holds the valve in the air inlet; and a spring operably coupled to the valve, wherein the spring has a biasing force that biases the valve to a closed position and wherein the air pressure characteristic during the second mode overcomes the biasing force to move the valve to an open position.
- 7. The noise control system of claim 6, wherein the valve is disposed in the air inlet to allow air to flow through approximately half of the air inlet when the valve is in the closed position.
- 8. The noise control system of claim 6, wherein the support comprises a shaft connected to the valve.
- 9. The noise control system of claim 6, wherein the support comprises at least one support protrusion integrally formed with the valve.
REFERENCE TO RELATED APPLICATIONS
[0001] The present invention claims priority to U.S. Provisional Patent Application No. 60/389,581, filed Jun. 18, 2002.
Provisional Applications (1)
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Number |
Date |
Country |
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60389581 |
Jun 2002 |
US |