Invention Grant
- Patent Title: Indicating instrument for vehicle
- Patent Title (中): 车辆指示仪表
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Application No.: US12658219Application Date: 2010-02-04
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Publication No.: US08111032B2Publication Date: 2012-02-07
- Inventor: Hideyuki Nakane
- Applicant: Hideyuki Nakane
- Applicant Address: JP Kariya
- Assignee: Denso Corporation
- Current Assignee: Denso Corporation
- Current Assignee Address: JP Kariya
- Agency: Harness, Dickey & Pierce, PLC
- Priority: JP2009-025213 20090205; JP2009-025214 20090205
- Main IPC: H02P8/00
- IPC: H02P8/00 ; H02K37/12 ; G01R1/20

Abstract:
An indicating instrument for a vehicle includes a step motor including a field winding, a pointer, a stopper device for stopping the pointer, which is rotating in a zero-reset direction, at a stopper position, a detecting device for detecting induced voltage of the field winding at each of detecting points, a control device for performing zero-reset control, whereby a drive signal is controlled to rotate the pointer in the zero-reset direction. In a state of abnormal detection in which the induced voltage larger than a predetermined set value is detected at a zero point; and the induced voltage equal to or smaller than the set value is detected at a next detecting point to the zero point, the control device assumes synchronization loss of the step motor and continues the zero-reset control until an assumptive electrical angle corresponding to a rotational position of the pointer reaches the zero point.
Public/Granted literature
- US20100192836A1 Indicating instrument for vehicle Public/Granted day:2010-08-05
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