The Sumitomo Electronic Antilock System

In spring 1987 Sumitomo Electric Ind. Ltd.(SEI) started production of an electronic antilock system for a Japanese car manufacturer. Features of this system are:

1. 1.
   Extremely reliable due to

   • - separate hydraulic control circuit.
   • - dual electronic circuit.
   • - self diagnostic function.
2. 2.
   Improved pedal feel by using cut-off valves.
3. 3.
   Easy addition of traction control system. This paper contains the basic concepts and details the components that make up the system.