192 clutches and power-stop control – Clutches – Operators
Patent
1991-02-06
1992-03-10
Braun, Leslie A.
192 clutches and power-stop control
Clutches
Operators
192 0075, 192 0096, 361152, 323282, 323284, F16D 2700, B60K 4102, G05F 156
Patent
active
050943332
ABSTRACT:
A current control device for an automotive electromagnetic clutch includes a first and a second transistor 8 and 13 and a current detector resistor 14, which are coupled in series with the electromagnetic clutch 4. A PWM modulator 7 controls the ON/OFF of the first transistor to control the amount of excitation current flowing through the electromagnetic clutch. The second transistor turns off the excitation current in response to the disconnection signal SO for the electromagnetic clutch. The current detector 6 detects the current flowing through the resistor 14, and the amount of current through the electromagnetic clutch is controlled to a target valve via the calculation means 2, the deviation amplifier 5, and the PWM modulator 7. The error in current detection due to the current flowing through the reverse excitation resistor 12 is eliminated by the insertion of a transistor 17 controlled in response to the clutch disconnection signal SO by a transistor 19 (FIG. 2). Alternatively, the effect of the base current to the current detection is eliminated by an adoption of a second transistor 70 of the field effect type (FIG. 3).
REFERENCES:
patent: 4242629 (1980-12-01), Shuey
patent: 4499412 (1985-02-01), Locher et al.
patent: 4515257 (1985-05-01), Takano et al.
patent: 4520909 (1985-06-01), Brewer
patent: 4521726 (1985-06-01), Buonik
patent: 4615425 (1986-10-01), Kobayashi et al.
patent: 4620624 (1986-11-01), Mitsui et al.
patent: 4660699 (1987-04-01), Sakakiyama
patent: 4662496 (1987-05-01), Sakakiyama
patent: 4674610 (1987-06-01), Sakakiyama
patent: 4922160 (1990-05-01), Ogawa
Braun Leslie A.
Mitsubishi Denki K.K.
Whitevan Nicholas
LandOfFree
Current control device for an automotive electromagnetic clutch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current control device for an automotive electromagnetic clutch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current control device for an automotive electromagnetic clutch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2280216