Boots – shoes – and leggings
Patent
1987-03-06
1989-05-30
Gruber, Felix D.
Boots, shoes, and leggings
74866, 192 0052, 192 0092, B60K 4102, F16D 2512, G06F 1520
Patent
active
048356948
ABSTRACT:
An automatic transmission includes a torque converter with a directly coupled clutch. A plurality of rotational speed sensors are used in the control of a lockup and a shifting operation. The invention provides an arrangement to detect any abnormality associated with such sensors. Under the lockup condition of the torque converter, a speed Ve detected by an engine rotational speed sensor, and speeds Vsp1 and Vsp2 detected by a first and a second vehicle speed sensor and a speed ratio K.sub.1 of a change gearing are used to detect any abnormality associated with the three sensors. All of the sensors are determined to be properly functioning when the equalities Ve=K.sub.1 .multidot.Vsp1 and Ve=K.sub.1 .multidot.Vsp2 apply. The first vehicle speed sensor is determined to be faulty when the former equation applies while the latter equation does not apply, and the second vehicle speed sensor is determined to be faulty when the former equality applies while the latter does not apply. When the both equalities do not hold, the engine rotational speed sensor is determined to be faulty.
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patent: 4338832 (1982-07-01), Pelligrino
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patent: 4393467 (1983-07-01), Miki et al.
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patent: 4667541 (1987-05-01), Shimaoka et al.
patent: 4708032 (1987-11-01), Harada et al.
Ishikawa Kazuo
Yamamoto Keiichi
Aisin Seiki Kabushiki Kaisha
Gruber Felix D.
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