Lock-up control device and method for lock-up type automatic tra

Details Lock-up control device and method for lock-up type automatic tra Lock-up control device and method for lock-up type automatic tra

1982-09-20

1985-03-12

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 0052, B60K 4128

Patent

active

045039569

ABSTRACT:
A lock-up control device in which a pulse train is generated which has a duration which increases as the vehicle speed decreases. A counter generates a period indicative signal indicative of a current period of the pulse train. A memory stores the period indicative signal for a preceding period. An adder generates an adder signal indicative of the addition of a preset value to the period indicative signal stored in the memory. A comparator compares the adder signal with the period indicative signal generated by the counter and generates a comparator signal when the former is larger than the latter. A flip-flop generates a flip-flop signal when the comparator signal occurs under the presence of a lock-up signal. An AND gate provides a lock-up release signal when said flip-flop signal occurs irrespective of the presence of the lock-up signal.

REFERENCES:
patent: 3448640 (1969-06-01), Nelson
patent: 3805640 (1974-04-01), Schneider et al.
patent: 4038889 (1977-08-01), Lindow et al.
patent: 4056177 (1977-11-01), Ahlen et al.
patent: 4172505 (1979-10-01), Rabus et al.
patent: 4208929 (1980-06-01), Heino et al.
patent: 4270636 (1981-06-01), Sunohara et al.
patent: 4271939 (1981-06-01), Iwanaga et al.
patent: 4294140 (1981-10-01), Iwanaga et al.
patent: 4324153 (1982-04-01), Sugimoto et al.
patent: 4369865 (1983-01-01), Sunohara et al.

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