Abstract
This paper focuses on the dynamic modeling and control of engine starting for a Full Hybrid Electric Vehicle (FHEV) consisting of an Integrated Starter Generator (ISG) and Dual Clutch Transmissions (DCTs). The dynamic characteristics of the engine, the ISG motor and the main clutch are analyzed respectively. The dynamic models of the main components of the powertrain system are also established taking the system dynamic characteristics into consideration. The FHEV dynamic model of engine starting during electric driving mode has been investigated in detail. The coordinated control strategy of engine starting has been proposed based on the powertrain system dynamic characteristics. The simulation for the engine starting control during electric driving mode has been performed based on the Matlab/Simulink platform. The simulation results show that the proposed control strategy satisfies the requirements of response and smoothness during engine starting process. Furthermore, a bench test has been carried out to analyze the system characteristics during engine starting process. The test data is highly agreeable to the simulation data and the effectiveness of engine starting control strategy is validated by the comparison between simulation results and the test data.
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Abbreviations
- ṁ a :
-
rate of air mass flow in manifold and port passage
- ṁ at :
-
air mass flow rate past throttle plate
- ṁ ap :
-
air mass flow rate into cylinder
- ṁ fi :
-
injected fuel mass flow
- ṁ f :
-
cylinder port fuel mass flow
- ṁ ff :
-
fuel film mass flow
- ṁ fv :
-
fuel vapor mass flow
- c t :
-
flow coefficient of throttle body throat
- α :
-
is the throttle plate angle
- V m :
-
volume of manifold and port passage
- T i :
-
engine indicated torque
- T load :
-
engine loading torque
- θ :
-
spark advance angle
- η i :
-
engine indicated efficiency
- λ :
-
air/fuel ratio
- H u :
-
low BTU of fuel
- V d :
-
d-axis voltage
- V q :
-
q-axis voltage
- i d :
-
d-axis current
- i q :
-
q-axis current
- L d :
-
d-axis inductance
- L q :
-
q-axis inductance
- p :
-
pole pairs of permanent magnet synchronous motor
- ψ m :
-
magnet flux of permanent magnet synchronous motor
- Φ m :
-
magnet flux
- H m :
-
magnet field intensity
- L m :
-
of magnetic circuit
- xs :
-
armature displacement
- xs0 :
-
initial compression displacement of the HSV return spring
- Q in :
-
average flow of supplying port
- Q out :
-
average flow of recycle port
- Q net :
-
net flow from the HSV to hydraulic cylinder
- τ :
-
duty ratio
- xp :
-
hydraulic cylinder piston displacement
- driven :
-
main clutch driven plate
- driving :
-
main clutch driving plate
- w :
-
wheel
- L :
-
loading
- C0 :
-
main clutch
- e :
-
engine
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Liu, Y., Chen, D., Lei, Z. et al. Modeling and control of engine starting for a full hybrid electric vehicle based on system dynamic characteristics. Int.J Automot. Technol. 18, 911–922 (2017). https://doi.org/10.1007/s12239-017-0089-2
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DOI: https://doi.org/10.1007/s12239-017-0089-2