Hydraulic system fault diagnosis method, control method of vehicle driving system and vehicle

• Main Authors: GONG WENTAO, LI XIAOLONG, REN CHUANWEI, LI JIQIANG, XU SHILONG, SHEN YONG, BI LU
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2022
• Subjects: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TRANSPORTING; VEHICLES IN GENERAL

The invention relates to the technical field of vehicle control, particularly provides a hydraulic system fault diagnosis method, a control method of a vehicle driving system and a vehicle, and aims to solve the technical problem that fault diagnosis of a hydraulic system cannot be realized by an existing method. In order to achieve the purpose, the hydraulic system fault diagnosis method comprises the steps that the actual oil pressure, the maximum oil pressure threshold value and the minimum oil pressure threshold value output by an oil pump unit are obtained; whether the actual oil pressure is larger than the maximum oil pressure threshold value or smaller than the minimum oil pressure threshold value is judged; under the condition that the actual oil pressure is larger than the maximum oil pressure threshold value, it is determined that the hydraulic system is blocked; or under the condition that the actual oil pressure is smaller than the minimum oil pressure threshold value, it is determined that leakag