Throttle control system with motor linkage and position control
AssigneeSociete d'Applications Generales d'Electricite et de Mecanique Sagem
InventorJean-Pierre Ricouard
Life of this patent
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Abstract
A throttle control system includes a pedal (10) and a mechanical linkage , 12, 13) to a casing (6). Stepper motor (5) has a stator mounted on the casing (6), so that as the casing (6) is rotated, it will also move the stator of the stepper motor (5). Stepper motor (5) also controls the position of a shaft (4) which carries a butterfly valve (1) regulating the fuel flow in an internal combustion engine. Position sensor (8) senses angular changes of position between casing (6) and shaft (4). Position changes in shaft (4) resulting from operation of pedal (10) and linkage (11, 12, 13) are signalled to microprocessor (7) which operates motor (5) to provide corrective rotation of shaft (4).
Claims6
A throttle control system for controlling the supply of fuel to a vehicle internal combustion engine through an inlet manifold (2), said system comprising:
- an inlet butterfly valve (1) positioned in said inlet manifold (20);
- a motor (5) having a stator and a shaft that extends from the stator to carry the butterfly valve (1);
- said shaft being rotatable with respect to said stator;
- a mechanical linkage including a portion on which said stator is mounted, such linkage being movable in response to an acceleration/deceleration input to move said stator with respect to said;
- a position sensor for sensing position of the shaft relative to said stator;
- and
- a microprocessor (7) electrically connected to said sensor to receive signals indicating the position of said shaft with respect to said stator, said microprocessor (17) comparing the indicated position with stored values,, and in response thereto commanding rotation of the shaft (4).
Dependencies are inferred from the claim text.