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
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Patent Information

Application Number
JP2022174561
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-10-31
Publication Date
2026-07-07
Estimated Expiration
2042-10-31

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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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Citation Information

Patent Citations

  • Catalyst protecting device for engine

    JP2000265888A

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    JP2001214773A

  • Exhaust emission control device for engine

    JP2002089332A

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