Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1992-11-18
1994-03-08
Herrmann, Allan D.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
74868, 192109F, B60K 4104
Patent
active
052918041
ABSTRACT:
Apparatus including a pressure regulating valve for regulating line pressure for hydraulically operated frictional coupling devices of a vehicle automatic transmission, and a cut-back valve for causing the pressure regulating valve to raise the line pressure to a higher level when the transmission is placed in first-speed position, than the normal level established when the transmission is placed in any higher-gear position whose speed reduction ratio is lower than that of the first-speed position. A pressure applying device is provided to apply to the cut-back valve first and second pressures to be applied to respective two coupling devices to establish a higher-gear position of the transmission, to operate the cut-back valve for causing the pressure regulating valve to raise the line pressure to the higher level when the vehicle is started in a high-gear start mode with the transmission placed in the higher-gear position.
REFERENCES:
patent: 2995957 (1961-08-01), Wilson et al.
patent: 3495481 (1970-02-01), Ohie et al.
patent: 3543610 (1970-12-01), Kogaki
patent: 3710649 (1973-01-01), Kubo
patent: 4539870 (1985-09-01), Sugano
Toyota Corona, New Car Features, Aug. 1985, pp. 4-50 and 4-51.
Fundamentals of Automatic Transmissions, Service Training Information, Toyota Motor Corporation, 1988, pp. 73-75.
Kashihara Yuji
Nakamura Shinya
Herrmann Allan D.
Toyota Jidosha & Kabushiki Kaisha
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