Hybrid vehicle control device and hybrid vehicle control method
By using a NOx purification system with SCR and LNT catalysts in hybrid vehicles, abnormalities are detected and direct engine operation is limited. By adopting a series hybrid driving mode, the NOx emission problem when the LNT system malfunctions is solved, ensuring the vehicle's driving performance and output requirements.
CN121912937APending Publication Date: 2026-04-24ISUZU MOTORS LTD
2 Cites 0 Cited by
Patent Information
- Application Number
- CN202511485499.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-10-23
- Filing Date
- 2025-10-17
- Publication Date
- 2026-04-24
AI Technical Summary
Technical Problem
In the existing technology, when the LNT system of a hybrid vehicle malfunctions, the existing technology cannot effectively solve the problem of NOx emissions from the vehicle.
Method used
By using a NOx purification system with SCR and LNT catalysts in hybrid vehicles, abnormalities are detected and the engine direct drive is restricted when abnormalities occur. A series hybrid driving mode is adopted to ensure that the engine output is within the purification range and the electric motor output is used to meet the vehicle's needs.
Benefits of technology
Even when the LNT system malfunctions, it can still effectively suppress NOx emissions, ensuring good driving performance and output requirements of the vehicle.
✦ Generated by Eureka AI based on patent content.
Abstract
Provided are a control device and a control method for a hybrid vehicle, which can suppress NOx emission to the outside of the vehicle and ensure good drivability even when an abnormality occurs in an LNT system. A hybrid vehicle has an engine and an electric motor as power sources, can perform series hybrid travel and engine direct travel, and has a NOx purification system using an SCR catalyst and an LNT catalyst in an engine exhaust passage. The control device includes: an abnormality detection unit that detects an abnormality in the NOx purification system using the LNT catalyst; and a travel state control unit that, when an abnormality is detected, restricts the travel mode of the vehicle to series hybrid travel and prohibits engine-direct travel, and causes the engine to operate in a steady state so that the output becomes an output that is equal to or greater than a predetermined value within the following output range. The output range is a range in which the NOx emission amount of the engine does not exceed the NOx cleanable amount of the NOx purification system using the SCR catalyst.
Need to check novelty before this filing date? Find Prior Art