Oxygen sensor diagnosis control system of HEV

• Main Author: LEE, JEA MUN
• Format: Patent
• Language: English; Korean
• Published: 11.10.2016
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLETECHNOLOGY; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDEDFOR; STARTING OF COMBUSTION ENGINES; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

The present invention relates to an oxygen sensor diagnosis control system of a hybrid vehicle, and more specifically, to an oxygen sensor diagnosis control system of a hybrid vehicle, to remove uncertainty of the number of oxygen sensor diagnoses and restrict an unneeded oxygen sensor diagnosis. According to the present invention, in a hybrid vehicle including a hybrid controller to control general functions of the vehicle, the hybrid controller determines whether an oxygen sensor diagnosis mode is changed based on a result of calculated oxygen sensor diagnosis index, and determines whether a condition to diagnose an oxygen sensor is satisfied when the oxygen sensor diagnosis index is decreased to enter a diagnosis guide mode or a forcible diagnosis mode. 본 발명은 하이브리드 차량의 산소센서 진단 제어 시스템에 관한 것으로, 더욱 상세하게는 하이브리드 차량에서 산소센서 진단 횟수의 불확실성을 제거하고 불필요한 산소센서의 진단을 억제하기 위한 하이브리드 차량의 산소센서 진단 제어 시스템에 관한 것이다. 이에 본 발명에서는, 차량의 전반적인 기능을 제어하는 하이브리드 제어기를 포함하는 하이브리드 차량에 있어서, 상기 하이브리드 제어기는 산소센서 진단지수를 연산한 결과를 기반으로 산소센서 진단 모드의 전환 여부를 결정하고, 산소센서 진단지수가 감소하여 진단 유도 모드 또는 강제 진단 모드에 진입시 산소센서의 진단을 수행하기 위한 조건을 만족하는지 여부를 판단하는 것을 특징으로 하는 하이브리드 차량의 산소센서 진단 제어 시스템을 제공한다.