| 摘要 |
PROBLEM TO BE SOLVED: To provide a microcomputer base electronic control system 24 for a full time four-wheel drive torque transfer case to monitor a relative slippage between front and rear output shafts 27 and 26. SOLUTION: The electronic control system 24 asks questions continually to two Hall effect sensors 44 and 46 which are located in the vicinity of toothed wheels of the front and rear output parts 37 and 38 of the torque transfer case 10. A tooth count is stored in two numerical stacks (one in each stack). When the tooth count is detected, the electronic control system adds the count to the present stack register of the sensors and the push-down of only one register is executed to the whole of the registers of the other stacks. The last register is pushed out from the stack memory or eliminated. By the comparison of the sum of the tooth counts from each stack, a relative rotation of one output shaft to the other output shaft is directly confirmed without relation to the time base reference.
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