| abstract |
The invention discloses a kind of diagnostic method of the lambda sensor for hybrid electric vehicle, it is included from the EMS for being configured to control engine（Engine management system）Receive the diagnosis request signal of the diagnosis for lambda sensor；In response to receiving diagnosis request signal, it is determined whether passive running status occur, under the passive running status, when closing accelerator, the speed of vehicle is in the reduction range pre-set；And separate engine clutch when there is passive running status.Next, when engine clutch is separated, while the reference velocity for making engine by controlling HSG to pre-set works, in response to receiving the fuel for diagnosing request signal and cutting off engine.When above-mentioned steps are completed, the diagnosis of lambda sensor is then performed. |