Engine Start-Up Robust Control for a Power-Split Hybrid System Based on μ Synthesis Method

Experimental research is essential in the development of a hybrid electric vehicle. In this study, a bench test was conducted for a compound power-split hybrid electric vehicle (PSHEV) to analyze the real dynamic characteristics of its components and the factors of system shock and vibration during the engine start-up process. Firstly, the mode switching process with an engine start-up was divided into four stages by the lever method. The basic control strategy of mode switching with engine start-up was formulated and tested on a bench test platform. Secondly, based on the bench test data, the output characteristics of the battery motor, engine, and driveshaft were analyzed in detail. The main variable parameters of the engine control unit were investigated in the engine start-up process. Ultimately, the results showed that the engine’s pulsating torque was the main reason for system jerk and vibration during the engine start-up process, and the excessive intake manifold pressure before the engine’s ignition was one of the main reasons for the large output torque ripple. When initiating the electric engine starting process, the jerk and vibration presented a wide fluctuation. The maximum value of the equivalent jerk was 92.12 m/s3, and the maximum value of the absolute value of the vibration acceleration was 4.077 m/s2.

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Optimization of a Common Rail Diesel Engine Start-up Process

10.4271/2004-01-0119 ◽

2004 ◽

Author(s):

Fuyuan Yang ◽

Jingyong Zhang ◽

Qiang Han ◽

Minggao Ouyang

Keyword(s):

Diesel Engine ◽

Common Rail ◽

Start Up ◽

Engine Start

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Synthesis Method of Mixed Sensitivity for H-infinity Robust Control Optimization on DC Motor of Mechatronics Model

10.1109/icramet53537.2021.9650506 ◽

2021 ◽

Author(s):

Jalu A. Prakosa ◽

Edi Kurniawan ◽

Suryadi ◽

Bernadus H. Sirenden ◽

Purwowibowo ◽

...

Keyword(s):

Robust Control ◽

Synthesis Method ◽

Dc Motor ◽

H Infinity ◽

Control Optimization

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Modeling Viscous Isothermal Piston Skirts EHL in Very Low Initial Engine Start Up Speeds

ASME/STLE 2011 Joint Tribology Conference ◽

10.1115/ijtc2011-61012 ◽

2011 ◽

Cited By ~ 1

Author(s):

Syed Adnan Qasim ◽

M. Afzaal Malik

Keyword(s):

Film Thickness ◽

Elastohydrodynamic Lubrication ◽

High Viscosity ◽

Solution Technique ◽

Engine Operation ◽

Low Speed ◽

Start Up ◽

Speed Optimization ◽

Piston Skirts ◽

Engine Start

In the normal low-speed engine operation, elastohydrodynamic lubrication (EHL) of piston skirts and lubricant rheology reduce friction and prevent wear. In a few initial start up cycles, a very low engine speed and absence of EHL cause adhesive wear. This study models hydrodynamic and EHL of piston skirts in the initial very low cold engine start up speed by using a high viscosity lubricant. The 2-D Reynolds equation is solved and inverse solution technique is used to calculate the pressures and film thickness profiles in the hydrodynamic and EHL regimes, respectively. The work is extended to investigate the effects of three very low initial engine start up speeds on the transverse eccentricities of piston skirts, film thickness profiles and pressure fields in the hydrodynamic and EHL regimes. Despite using a viscous lubricant, thin EHL film profiles are generated at low start up speeds. This study suggests very low speed optimization in the cold initial engine start up conditions to prevent piston wear under isothermal conditions.

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Robust control synthesis method for the satellite

Proceedings of the 2003 International Conference on Machine Learning and Cybernetics (IEEE Cat. No.03EX693) ◽

10.1109/icmlc.2003.1259571 ◽

2004 ◽

Author(s):

Zhi-Hong Yang ◽

Guang-Fu Ma ◽

Chuan-Jiang Li

Keyword(s):

Robust Control ◽

Synthesis Method ◽

Control Synthesis

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Particulate Matter Emissions during Engine Start-Up

Nanoparticle Emissions From Combustion Engines - Springer Tracts on Transportation and Traffic ◽

10.1007/978-3-319-15928-7_5 ◽

2015 ◽

pp. 47-60 ◽

Cited By ~ 1

Author(s):

Jerzy Merkisz ◽

Jacek Pielecha

Keyword(s):

Particulate Matter ◽

Start Up ◽

Particulate Matter Emissions ◽

Engine Start

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Parametric Investigation of Dual-Mass Flywheel Based on Driveline Start-Up Torsional Vibration Control

Shock and Vibration ◽

10.1155/2019/3171698 ◽

2019 ◽

Vol 2019 ◽

pp. 1-12 ◽

Cited By ~ 4

Author(s):

Liupeng He ◽

Changgao Xia ◽

Sida Chen ◽

Jiwei Guo ◽

Yi Liu

Keyword(s):

Torsional Vibration ◽

Torsion Angle ◽

Torsional Stiffness ◽

Rotary Inertia ◽

Research Model ◽

Attenuation Effect ◽

Start Up ◽

Design Requirements ◽

Simulation Results ◽

Engine Start

This paper is aimed to investigate the influence of dual-mass flywheel (DMF) kinetic parameters on driveline torsional vibration in engine start-up process, which prescribes the design requirements under start-up condition for DMF matching. On the basis of driveline excitation analysis during engine start-up, the analytical model of DMF driveline torsional vibration system is built and simulated. The vehicle start-up test is conducted and compared with the simulation results. On account of the partial nonstationary characteristic of driveline during start-up, the start-up process is separated into 3 phases for discussing the influence of DMF rotary inertia ratio, hysteresis torque, and nonlinear torsional stiffness on attenuation effect. The test and simulation results show that the DMF undergoes severe oscillation when driveline passes through resonance zone, and the research model is verified to be valid. The DMF design requirements under start-up condition are obtained: the appropriate rotary inertia ratio (the 1st flywheel rotary inertia-to-the 2nd flywheel rotary inertia ratio) is 0.7∼1.1; the interval of DMF small torsion angle should be designed as being with small damping, while large damping is demanded in the interval of large torsion angle; DMF should be equipped with low torsional stiffness when working in start-up process.

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