Engine air intake shut off valve
DCFirst Claim
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1. An air intake shut-off valve for an engine having an air intake, the shut-off valve comprising;
- (a) a housing having an air-flow passage extending through the housing;
(b) a flow control valve disposed in the air-flow passage, the flow control valve being movable between a first open position that permits air-flow through the passage and a second closed position that prevents air-flow through the passage;
(c) actuation means for moving the flow control valve between its first open position and its second closed position, and for moving the flow control valve between its second closed position and its first open position;
(d) switch means for activating and deactivating the actuation means; and
(e) means for sealably connecting the air-flow passage to the air intake of the engine;
wherein the actuation means is adapted to move the flow control valve between its first open position and its second closed position in a period of time that is greater than 1 second, but that is less than 6 seconds.
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Abstract
The invention is directed to a shut-off valve for stopping the air-flow to an engine. A butterfly valve disposed in an air passage is moved between a first open position and second closed position in a controlled fashion to prevent the build up un-burnt fuel in the event of the activation of the valve.
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Citations
27 Claims
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1. An air intake shut-off valve for an engine having an air intake, the shut-off valve comprising;
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(a) a housing having an air-flow passage extending through the housing; (b) a flow control valve disposed in the air-flow passage, the flow control valve being movable between a first open position that permits air-flow through the passage and a second closed position that prevents air-flow through the passage; (c) actuation means for moving the flow control valve between its first open position and its second closed position, and for moving the flow control valve between its second closed position and its first open position; (d) switch means for activating and deactivating the actuation means; and (e) means for sealably connecting the air-flow passage to the air intake of the engine; wherein the actuation means is adapted to move the flow control valve between its first open position and its second closed position in a period of time that is greater than 1 second, but that is less than 6 seconds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An air intake shut-off valve for an engine having an air intake, the shut-off valve comprising;
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(d) a housing having an air-flow passage extending through the housing; (e) a butterfly valve disposed in the air-flow passage, the butterfly valve being movable between a first open position that permits air-flow through the passage and a second closed position that prevents air-flow through the passage, the butterfly valve having a central shaft; (f) a pinion gear connected to the shaft of the butterfly valve; (g) a worm gear driving the pinion gear; (h) an electric motor connected to the worm gear; (i) a controller module for activating and deactivating the electric motor and for controlling the speed of the motor; and (j) means for sealably connecting the air-flow passage to the air intake of the engine; wherein the actuation means is adapted to move the flow control valve between its first open position and its second closed position in a period of time that is greater than 1 second, but that is less than 6 seconds, whereby rotation of the worm gear causes rotation of the shaft of the butterfly valve such that the butterfly valve can be moved between its first open position and its second closed position and between its second closed position and its first open position in a pre-determined period of time. - View Dependent Claims (26, 27)
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Specification