Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1989-02-21
1991-02-12
Wright, Dirk
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
B60K 4118
Patent
active
049914642
ABSTRACT:
Hydraulic pressure which is regulated by a pressure control valve (linear solenoid valve) is applied to a hydraulic servo of a brake which is actuated when an engine-brake is effected. When the engine-brake is effected, a hydraulic pressure which is modulated by a modulator valve controlled by the linear solenoid valve is applied to the brake hydraulic servo. The pressure control valve provides high hydraulic pressure when vehicle speed is high based on signals from a speed sensor, and provides low hydraulic pressure when vehicle speed is low based on signals from the speed sensor, so that an engine-brake force is adequately controlled in accordance with vehicle speed. Furthermore, if a foot brake sensor is employed, the hydraulic pressure in accordance with vehicle speed can be made low when the engine-brake is effected with the foot brake applied. Based on signals from a front wheel rotation sensor and a rear wheel rotation sensor, the control unit calculates a rotational difference, so that the engine-brake force can be made low when the rotational difference is large.
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Ishikawa Kazunori
Iwatsuki Kunihiro
Kashihara Yuji
Taniguchi Hiroji
Taniguchi Takuji
Aisin Aw Co. Ltd.
Toyota Jidosha & Kabushiki Kaisha
Wright Dirk
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