QC/T 926-2013Reliability test methods for power units of light hybrid electric vehicles (ISG type) (English PDF)

3.1 Hybrid control unit (HCU)

Controller for hybrid power system.

3.2 Integrated starter and generator (ISG)

A motor that integrates the starting and power generation functions.

4.1 Test subjects

4.2 Test conditions

4.2.1 The accuracy of the test instrument, measurement position, and calculation of test data shall conform to the relevant provisions of Clauses 4 and 5 in GB/T 18297-2001 and GB/T 18488.2.

4.2.2 The DC power supply can provide the power to the motor system, while can also absorb the feedback power from the motor system. The working voltage and frequency of the DC power supply can meet the test requirements.

4.2.6 According to the manufacturer's provisions, perform the function test against the system consisting of the powertrain unit and the accessories; the system can work normally.

5.1 Test procedures

The test procedures can refer to Appendix A.

5.2 Test preparation

5.3 Initial test of performance

5.3.1 The engine throttle is fully open; set the motor load to the maximum electric power output. In the speed range of the engine, measure by successively changing the motor speed; appropriately distribute more than 8 measurement points; test the output torque of the engine at different speed points.

5.4 Reliability test

The reliability test shall be performed as per the Appendix B.

5.5 Inspection and maintenance

5.5.1 General

Inspection and maintenance shall be carried out according to the following requirements; but the contents and cycle may be appropriately increased and decreased. The inspection results and maintenance situations shall be recorded in detail.

5.5.3 Inspection records per 1h

5.5.3.1 Record per hour the reliability accumulative running time, powertrain unit output torque, engine speed, engine coolant outlet temperature, engine oil temperature, input DC bus voltage and current of the motor controller, voltage and current of each output phase of the motor controller, motor coolant outlet temperature (if the system contains the cooling device of the motor coolant); if the motor winding is equipped with a thermistor temperature sensor, then the operating temperature of the motor winding shall checked together.

5.5.3.2 After the cold start, the pre-heating time of the powertrain unit shall not be included int the reliability accumulative time.

5.5.4 Inspection and maintenance every 24h

5.5.4.1 The engine part shall be performed as per the 10.3 in GB/T 19055-2003.

5.5.5 Inspection and maintenance every 96h

Inspect and maintain the engine every 96h according to 10.4 in GB/T 19055-2003.

5.5.6 Inspection and maintenance every 192h

Inspect and maintain the engine every 192h according to 10.5 in GB/T 19055-2003.

5.6 Performance retest

The performance retest of the powertrain unit shall be carried out as per the 5.3.

The performance test against the engine and motor shall be carried out separately according to GB/T 18297-2001, GB/T 18488.2, and the performance report test items of the manufacturer.