Vehicle speed display apparatus

Details Vehicle speed display apparatus Vehicle speed display apparatus

2005-11-22

2005-11-22

Kwok, Helen (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Recording or registering interrelated factors

C073S001370, C702S148000

Reexamination Certificate

active

06966223

ABSTRACT:
A vehicle speed display apparatus capable of displaying an accurate vehicle speed in either 2WD mode or in 4WD mode. A vehicle speed calculating unit51calculates the vehicle speed, according to the output from a wheel rotational speed sensor22.A 2WD/4WD detecting unit52switches the destination of the vehicle speed calculated by the vehicle speed-calculating unit51between a 2WD correcting unit53and a 4WD correcting unit54,depending whether the vehicle is traveling in 2WD mode or in 4WD mode. The 2WD correcting unit53corrects the vehicle speed in the 2WD mode using a first correction coefficient for the 2WD mode, and the 4WD correcting unit54corrects the vehicle speed in the 4WD mode using a second correction coefficient for the 4WD mode. The corrected vehicle speed is displayed by a vehicle speed display unit55.

REFERENCES:
patent: 4417641 (1983-11-01), Kageyama
patent: 4613008 (1986-09-01), Hiraiwa et al.
patent: 5566094 (1996-10-01), Kojima et al.
patent: 5612880 (1997-03-01), Kojima et al.
patent: 6466855 (2002-10-01), Yamaguchi
patent: 6526367 (2003-02-01), Yamamoto et al.
patent: 2002/0104703 (2002-08-01), Goto et al.

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