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Optimized Control of Dynamical Engine-Start Process in a Hybrid Electric Vehicle
Technical Paper
2020-01-0268
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Engine start while driving is one of the most typical and frequent work conditions for hybrid vehicles. Engine start has very significant impact on the driving comfort. Engine start, especially a dynamical engine start, have high control requirements regarding control time, torque output and riding comfort. In some hybrid transmissions such as P2, engine is cranked and synchronized through wet clutch slipping. Because clutch pressure control has time-varying delay and estimation precision of engine torque by ECU (Engine Control Unit) is poor, conventional PID controller is unable to meet the high requirements of control quality. A new control algorithm is proposed in this paper to cope with all these challenges. The new control algorithm is based on LADRC (Linear Active Disturbance Rejection Controller) and is improved through combination with Smith predictor and Adaline network. LADRC is adopted to reduce negative effects of poor precision of engine torque. Smith predictor is introduced to compensate the time delay of clutch torque. In addition, the time-varying delay can be estimated by Adaline network and parameters of Smith predictor can also be adaptive adjusted.
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Gao, J., Lou, D., and Zhang, T., "Optimized Control of Dynamical Engine-Start Process in a Hybrid Electric Vehicle," SAE Technical Paper 2020-01-0268, 2020, https://doi.org/10.4271/2020-01-0268.Data Sets - Support Documents
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