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Drive shaft torque controlling apparatus for use in a vehicle having a power transmission mechanism and method therefor

  • US 5,938,712 A
  • Filed: 11/20/1996
  • Issued: 08/17/1999
  • Est. Priority Date: 03/26/1993
  • Status: Expired due to Fees
First Claim
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1. A drive shaft torque controlling apparatus for a vehicle comprising an engine, an automatic transmission with a torque converter, and a controlling apparatus with at least one microcomputer for controlling said engine and said automatic transmission, comprising(a) a detector for detecting input data including engine rotational speed and engine load, and automatic transmission output shaft rotational speed and gear position;

  • (b) storing means for storing an engine torque characteristic;

    (c) storing means for storing a torque converter characteristic;

    (d) means for obtaining engine output shaft torque data with said input data and said engine torque characteristic;

    (e) means for obtaining a torque converter input torque with said input data and said torque converter characteristic;

    (f) means for obtaining a deviation between said engine output torque and said torque converter input torque as an accessory torque; and

    (g) means for obtaining said torque converter input torque using said accessory torque and said engine output torque.

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