Hybrid vehicle and three-way catalyst diagnostic method and device thereof
A technology for hybrid vehicles and three-way catalytic converters, which is applied to the diagnostic devices of exhaust treatment devices, exhaust devices, and noise reduction devices, and can solve problems such as the inability to meet the diagnostic requirements of hybrid vehicles for three-way catalytic converters, and achieve The effect of not wasting energy
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[0027] The invention is aimed at the hybrid vehicle. During the whole diagnosis process, the engine is operated in two stages in turn, which are respectively the engine active reverse drag control stage and the engine power driving control stage, so that the oxygen content of the engine exhaust of the hybrid vehicle has a range from lean The process from rich to lean meets the diagnostic requirements of the three-way catalytic converter. Based on the above inventive concepts, a hybrid vehicle, a method for diagnosing a three-way catalytic converter of a hybrid vehicle, and a diagnostic device for a three-way catalytic converter of a hybrid vehicle according to the present invention can be implemented. It will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0028] Vehicle Example:
[0029] A hybrid vehicle embodiment of the present invention, such as figure 1 As shown, including vehicle controller VCU, engine controller ECU, ISG m...
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