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US 8,941,399 B2Granted
Position detecting device
AssigneeDenso Corporation
InventorsTetsuya Hara, Yoshiyuki Kono, Toru Shimizu, Takamitsu Kubota
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AssigneeDenso Corporation
InventorsTetsuya Hara, Yoshiyuki Kono, Toru Shimizu, Takamitsu Kubota
Estimating the term…
A first integrated circuit includes a first voltage output circuit for outputting a voltage, which proportionally increases in correspondence to an angular position of a throttle valve, a first protective resistor, a first output terminal connected to the first protective resistor, and a first abnormality detection circuit for outputting a first abnormality detection signal based on a voltage produced by the first protective resistor. A second integrated circuit is configured similarly to the first integrated circuit by a second voltage output circuit, a second protective resistor, a second output terminal, and a second abnormality detection circuit.
A position detecting device for outputting a voltage to an electronic control unit, which controls a movable body, in accordance with a position of the movable body, the voltage being limited to a voltage of a power source, the position detecting device comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Electrical control not provided for in groups f02d41/00 - f02d43/00
Of the electric type: detection of demand or actuation
Of the electric type: safety-related aspects
Controlling combustion engines
About 6 years 7 months of term left · ends 23 May 2033 (estimated)
The present application is based on and incorporates herein by reference Japanese patent application No. 2011-281334 filed on Dec. 22, 2011.
The present disclosure relates to a position detecting device for detecting a position of a movable body.
A conventional position detecting device is used to detect a rotation angle of a throttle valve in an electronically-controlled throttle system of a vehicle, a rotation angle of an accelerator pedal of an accelerator pedal module, a rotation angle of a tumble control valve and the like. For example, JP 3588127 (U.S. Pat. No. 5,260,877) discloses a position detecting device having two integrated circuits, which generate output signals varying in opposite directions.
The above and other objects, features and advantages of embodiments of a position detecting device will become more apparent from the following detailed description made with reference to the accompanying drawings. In the drawings:
FIG. 1 is a schematic view of an electronically-controlled throttle system including a position detecting device according to a first embodiment;
FIG. 2 is a block diagram of an electric circuit of the position detecting device according to the first embodiment;
A position detecting device according to a first embodiment is provided as a rotation angle sensor of an electronically-controlled throttle system, which controls an amount of air suctioned into cylinders of an internal combustion engine of a vehicle.
As shown in FIG. 1, a throttle angle sensor 4 is provided to output a voltage signal indicating an open angle θ of a throttle valve 1 to an electronic control unit (ECU) 40. The ECU 40 is configured to output a drive signal corresponding to the inputted voltage signal to a motor (not shown), which drives the throttle valve 1, so that the throttle valve 1 is driven to an open angle suitable for an operating condition of the internal combustion engine. The motor thus drives the throttle valve 1 to attain a target open angle thereby to regulate the amount of suctioned air.
A cylindrical yoke 2 and two permanent magnets 3 are fixed to one end of the throttle valve 1, which is a movable body. The permanent magnets 3 are attached to the radially inside surface of the yoke 2. Magnetic flux, which flows between the two permanent magnets 3, is indicated schematically by arrows.