| 摘要 |
PURPOSE: An apparatus for diagnosing the output of a hybrid vehicle engine is provided to diagnose combustion malfunction of a hybrid vehicle engine. CONSTITUTION: An apparatus for diagnosing the output of a hybrid vehicle engine comprises a hybrid control part for controlling the operation of an engine and a motor; an engine control part for controlling the operation of the engine according to the control of the hybrid control part; and a motor control part for controlling the operation of the motor according to the control of the hybrid control part. The engine control part submits a judgment of engine combustion malfunction or engine output error induced by instability if the engine repeats starting and stopping more times than a preset number. The hybrid control part executes a limp home mode after receiving the engine output error of the engine control part. [Reference numerals] (AA) Start; (B1) Is there a relevant error? (Oxygen sensor, CAN communication, injector); (B2) Is there an error related to a hybrid controller? (HCU, motor, battery); (CC,KK,LL) Are the conditions satisfied?; (D1,D2,D3,D4,D5,D6) No; (E1,E2,E3,E4,E5,E6) Yes; (F1) Engine RPM (1000-4000 rpm); (F2) Air inhaling amount (> 150 mg/stk); (F3) Air fuel ratio (1.8-3.5); (F4) Value of an oxygen sensor in front of a catalyst (3-4.5 volt); (F5) Amount of fuel jetted (> 3ms / stk); (F6) Value of an oxygen sensor in the rear part of a catalyst (< 0.1 volt); (GG) Engine use?; (H1) Engine idling maintenance time < 5 seconds; (H2) Engine rpm < 100 rpm; (H3) Engine starting number >= 3 times; (H4) HCU request = Engine idling; (H5) ECU engine state = Start -> Stop; (I1) Engine operation for battery charging; (I2) Charged engine RPM (1300-1700 rpm); (I3) Elapse time after starting charging > 20 seconds; (I4) Charging starting level - Current level >= +3%; (J1) During Engine operation for driving; (J2) Engine RPM (1000-4000 rpm); (J3) Air inhaling amount (> 150 mg/stk); (J4) Motor current ( > Allowance according to vehicle output); (MM,NN) Increase a count; (OO) Count >= 10; (PP) Count >= 100; (Q1) Diagnose engine output failure (engine warning light on and off, service lamp on and off, guiding message); (Q2) Vehicle power torque limit to a battery residual charging level; (Q3) Engine stop by limiting the vehicle power torque limit and lymph groove mode vehicle by a motor; (Q4) Stop vehicle operation and turn on an emergency light when reaching a battery level limit (about 35%); (RR) End |
