Development of ABS and Traction Control Computer

Paper #:
  • 901707

Published:
  • 1990-09-01
Citation:
Masutomi, S., Ise, K., and Tamura, K., "Development of ABS and Traction Control Computer," SAE Technical Paper 901707, 1990, https://doi.org/10.4271/901707.
Pages:
11
Abstract:
A new ABS and Traction control system (TRAC system) has been developed and put into mass production in a new model LEXUS LS400. The TRAC system controls Sub-Throttle Valve and brake hydraulic pressure independently for left and right wheels.To realize the ABS and TRAC system,it is necessary for the Electronic Control Unit (ECU) to process complex algorithm and high speed calculation. The ABS and TRAC ECU for LEXUS LS400 is constructed by 3 TOYOTA custom 8-bit single chip microcomputers. Each CPU performs wheel speed calculation,ABS control and TRAC control,sharing the common data through high speed serial communication.This paper describes the function of each CPU,the method of CPU communication and fail safe function in the ECU.
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