Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position
Patent
1977-01-03
1978-07-25
Scott, Samuel
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Preselected indexed position
B60K 4110
Patent
active
041022220
ABSTRACT:
A control system changes the gear ratio in an automatic transmission when engine torque is transferred from one member to another member of a three member planetary gear set. This transfer is accomplished through friction elements engaged and released by hydraulic pressure, without the use of one-way clutches. A closed loop electrical circuit is completed between a transducer, which provides an electrical signal related to the output torque of the transmission, and a pair of control valves, to vary the pressure applied by each control valve. A circuit for computing reaction torque is coupled between the transducer and a logic control circuit, which provides logic command signals for controlling operation of components in the closed loop circuit. The closed loop circuit includes two pulse width modulation circuits for regulating operation of the two control valves. The system calculates the value of the engine acceleration torque for the shift, subtracts this value from the initial output torque value to obtain the desired torque level for the shift, and uses this desired torque level to regulate the shift.
REFERENCES:
patent: 3726159 (1973-04-01), Mizote
patent: 3881368 (1975-05-01), Furuhashi et al.
patent: 3882740 (1975-05-01), Forster et al.
patent: 3941015 (1976-03-01), Robinson
patent: 3961546 (1976-06-01), Gilmore et al.
patent: 3983766 (1976-10-01), Forster et al.
patent: 4008567 (1977-02-01), Hirsch
patent: 4031782 (1977-06-01), Miller et al.
Miller Alan Leonard
Petzold Werner Paul
Borg-Warner Corporation
Chandler Lance W.
Jennings, Jr. James J.
Scott Samuel
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