Throttle assembly
AssigneeBendix Electronics S.A.
InventorJohn E. Cook
Life of this patent
Estimating the term…
Abstract
A throttle assembly (10) for an engine comprising: a primary throttle plate (16) rotatably mounted on a first shaft (18); linkage (22) for rotating the first shaft (18) in response to operator demand; a second throttle plate (42) received within a cut-out (30) formed in the first throttle plate and rotatably mounted relative to the first shaft; and an actuator (50) for rotating the second throttle plate relative to the first throttle plate to adjust the flow area of a second flow passage formed between the first and second throttle plates.
Claims10
A throttle assembly for an engine comprising:
- a primary throttle plate mounted on a first shaft and rotatable from an idle position at engine idle to a wide open throttle position to control air flow to the engine;
- first means for rotating the first shaft in response to operator demand;
- a second throttle plate received with a cut-out formed in the first throttle plate and rotatably mounted relative to the first shaft to permit bypass air flow across the primary throttle plate;
- and second means for rotating the second throttle plate relative to the first throttle plate including an electrical rotary actuator responsive to a control signal;
- wherein said second means includes means for measuring the position of the second throttle plate.
A throttle assembly comprising:
- means for establishing an air intake passage;
- means for controlling the flow of air to an engine including primary means, rotatably mounted in the passage means, and rotatable from a substantially closed position at engine idle speed conditions, to a substantially open position at wide open throttle conditions, for varying the flow area of the passage means;
- secondary means, rotatably mounted relative to the primary means, for varying the flow area of a secondary air flow passage to permit air to flow directly across and through such primary means, wherein the secondary means includes means for increasing the flow area of the secondary air flow passage during periods when the passage means is substantially closed by the primary means, and
- wherein the means for increasing includes means for determining that the primary means is at a position corresponding to engine idle and means for rotating the secondary means relative to the primary means, and
- means effective during non-idle conditions, for urging the secondary means to follow the primary means such that the secondary passage is maintained substantially closed.
A throttle assembly comprising:
- means for establishing an air intake passage;
- means for controlling the flow of air to an engine, including primary means, rotatably mounted in the passage means, and rotatable from a substantially closed position at engine idle speed conditions, to a substantially open position at wide open throttle conditions, for varying the flow area of the passage means;
- secondary means, rotatably mounted relative to the primary means, for varying the flow area of a secondary air flow passage to permit to flow directly across and through such primary means, and
- means effective during non-idle conditions, for urging the secondary means to follow the primary means such that the secondary passage is maintained substantially closed.
Dependencies are inferred from the claim text.