Machine element or mechanism – Gearing – Interchangeably locked
Patent
1998-09-11
2000-06-13
Ta, Khoi Q.
Machine element or mechanism
Gearing
Interchangeably locked
74336R, 477906, F06H 6138
Patent
active
060735074
ABSTRACT:
A shift control unit is provided in an electric-power-assist transmission which offers good operatability. A shift disabling unit employs a neutral-position detecting unit, a vehicle-speed judging unit, an engine-rotational-speed judging device, an OR circuit and an AND circuit. The neutral-position detecting unit is used for outputting an "H"-level signal to indicate that a gear is placed at a neutral position. The vehicle-speed judging unit generates an "H"-level signal for a speed of a vehicle equal to or higher than 10 km/h. On the other hand, the engine-rotational-speed judging device generates an "H"-level signal for a rotational speed of an engine equal to or higher than 3,000 rpm. The OR circuit generates an "H"-level signal when the vehicle-speed judging unit generates an "H"-level signal or the engine-rotational speed judging device generates an "H"-level signal. On the other hand, the AND circuit generates an "H"-level signal when the neutral-position detecting unit generates an "H"-level signal and the OR circuit also generates an "H"-level signal. With the AND circuit outputting the "H"-level signal, the shift disabling unit prevents a shift change from being made.
REFERENCES:
patent: 3670599 (1972-06-01), Nagamatsu
patent: 4996893 (1991-03-01), Nakamura et al.
patent: 5362286 (1994-11-01), Satoh et al.
patent: 5591102 (1997-01-01), White et al.
patent: 5688205 (1997-11-01), Buhler
patent: 5881853 (1999-03-01), Peuster et al.
Masuda Tatsuo
Narita Satoru
Ota Atsuo
Honda Giken Kogyo Kabushiki Kaisha
Ta Khoi Q.
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