Vehicle catalytic converter protection device
The vehicle catalyst protection device uses fuel pressure and oxygen detection to manage fuel supply and adjust air-fuel ratios, addressing fuel shortage detection and temperature suppression in catalysts, ensuring reliable operation and preventing damage.
JP7885658B2Active Publication Date: 2026-07-07SUZUKI MOTOR CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SUZUKI MOTOR CORP
- Filing Date
- 2022-10-31
- Publication Date
- 2026-07-07
Smart Images
Figure 0007885658000001 
Figure 0007885658000002
Abstract
To provide a protective device for a vehicle catalyst capable of appropriately detecting a fuel shortage state, and suppressing temperature rise of a catalyst.SOLUTION: A fuel shortage determination unit of an ECU determines whether fuel supplied to a fuel injector is in a fuel shortage state based on a fuel pressure detected by a fuel pressure sensor and an oxygen concentration detected by an O2 sensor (steps S3, S4, S5, S6, S7). A catalyst temperature control unit of the ECU executes temperature suppression control to suppress temperature rise of a catalyst when the fuel shortage determination unit determines that the fuel is in the fuel shortage state (steps S8, S10).SELECTED DRAWING: Figure 2
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