Vehicle electronic control system having fail-safe function
AssigneesDenso Corporation, Toyota Jidosha Kabushiki Kaisha
InventorHidemasa Miyano
Life of this patent
Estimating the term…
Abstract
A vehicle electronic control system has a control CPU and a monitor CPU. The control CPU performs a fail-safe processing thereby to reduce an engine output torque, when the monitor CPU monitoring the control CPU detects that the control CPU fails to perform throttle control for an engine. When the monitor CPU detects that the control CPU fails to perform the fail-safe processing, it performs a fail-safe processing in place of the control CPU. In this fail-safe processing, the monitor CPU continues to reset the control CPU so that the engine may be forcibly stopped.
Claims10
A vehicle electronic control system comprising:
- a main CPU for performing a fail-safe processing to reduce an output torque of an engine when a failure occurs in an electronic control of a vehicle;
- and
- a sub-CPU provided separately from the main CPU,
- wherein the sub-CPU is programmed to determine whether the fail-safe processing is performed properly by the main CPU, and performs a fail-safe processing in place of the main CPU upon determining an abnormality in the fail-safe processing of the main CPU.
Dependencies are inferred from the claim text.