Control system for road vehicle - has engine controlled by processor receiving inputs from accelerator pedal sensors duplicated for fail=safe operation

摘要

The drive-by-wire system has a microcomputer controller (10) with a processor (12) and memory (14) coupled by a bus to an I/O unit (16). The driver operates accelerator (30) and brake pedals (38) and coupled sensors (24, 26, 34) provide inputs to the controller. Output commands from the controller are received by the fuel regulator (58). The accelerator pedal sensors are duplicated to provide fail safe operation. The system has a watchdog routine to detect any failure. Any failure results in the engine operation being limited to a safe value. ADVANTAGE - Engine controller provides high level of safe operation.