Title: A Nonlinear Hybrid Model of a 4-Cylinder Engine for Idle Speed Control
1A Nonlinear Hybrid Model of a 4-Cylinder Engine
for Idle Speed Control
Andrea Balluchi (1), Marco Zoncu (1), Tiziano
Villa (1), Alberto L. Sangiovanni-Vincentelli (1,
2)
(1) PARADES E.E.I.G., Roma, Italy. (2) Dept. of
EECS, University of California, Berkeley CA.
CC Meeting in Amsterdam June 16-17, 2003.
2The Idle Speed Control Problem
specifications
constraints
3Nonlinear Hybrid Model of the Engine
clutch
control inputs
disturbance inputs
Power-train (CTS FSM)
n(t)
Tload(t)
spark
?(t)
Cylinders (FEM DES)
Intake manifold (CTS)
T(t)
p(t)
?(t)
4Intake Manifold Continuous Dynamics
5Power-train Scheme
Cylinders
6Power-train Continuous Dynamics
7Power-train Finite State Machine
8Single Cylinders Finite State Machine
9Cylinders Finite State Machine
10Cylinders Discrete Event System
11Cylinders Discrete Event System
12The Clutch Closing Manoeuvre
13The Clutch Closing Manoeuvre
14The Clutch Closing Manoeuvre
15Hybrid Models Successive Refinements
16Hybrid Models Successive Refinements
17Hybrid Models Successive Refinements
18Hybrid Models Successive Refinements
19Comparative Simulations
- Single-location Vs Two-location with spark advance
dc
Tg
Tl
20Comparative Simulations
- Single-location Vs Two-location with spark advance
21Comparative Simulations
- Two-location without and with manifold
22Comparative Simulations
- Two-location without and with manifold
23Comparative Simulations
- Two-location Vs Three-location
a 3.6 o
Tg
? 5 o
a 3.6 o
Tl
? 5 o
a 3.6 o
Tg
? -3.7 o
a 3.4 o
Tl
? 0 o
24Comparative Simulations
- Two-location Vs Three-location
25Conclusions
- Nonlinear model of the intake manifold
- Better modeling of the torque generation
mechanism - Modeling of the secondary driveline.