Upload
others
View
2
Download
0
Embed Size (px)
Citation preview
AVL List GmbH (Headquarters)
Public
Virtual Concept Definition of
Hyundai’s i30N VehicleAVL Simulation Conference 2018, Ulm/Germany
Pil-Young JEONG
Mario OSWALD
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 2Public
Product Visioni30N Affordable Fun-to-Drive
Well-Balanced “Hot Hatchback” between Performance and Everyday Use
N Cornering PracticalEveryday Sport Car
Race Track Capability
Seat
2.0T-GDIOverboost
Driving modeCarving Differential R-MDPS
Steering
SuspensionUHP Tire
N ESC
N ECS N Brakes
Gear ShiftingKnob
OptimizedDownforce
Reliable Cooling
Exhaust Sound
REV matching
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 3Public
Virtual Concept DefinitionProcess
Benchmarking:
• Competitive analysis
• Efficiency & fun-to-drive
• Highlights & weaknesses
• Deep dive
Vehicles:
• AVL Scatterband
• Honda Civic Type-R
• Renault Megane RS
Vehicle Simulation
• Vehicle simulation of multiple variants
• Simultaneous vehicle attribute assessment
Improvements
• Brakes
• Aerodynamics
• Body Chassis
• Chassis controls
• Steering
• Tire
• Powertrain
Output:Optimized Hyundai i30N
Benchmarking Target Setting Simulation Improvements
Target Setting
Translating customers vision into technical requirements:
• Driveability
• Performance
• Handling
• Lap Time
Define well-balanced
“Hot Hatchback”
AVL VSM
AVL-DRIVE
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 4Public
LAP TIME
EFFICIENCY PERFORMANCE DRIVEABILITYHANDLING
3
4
5
6
7
8
9
10
Road load A0[N]
Road load C0[N/kph²]
0-100[s]
vmax[kph]
Agility[DR]
Stability[DR]
Self-Steering[DR]
max. lateralacceleration
[m/s²]
Body motion[°/g]
Powerfulnessat full load
[DR]
Transientresponse
[DR]
NordschleifeLap time[mm:ss]
Att
ribute
Rating
[DR] … AVL-DRIVE Rating
BenchmarkingCompetitor Vehicles Analysis
AVL scatter band
Honda Civic TypeR2.0 TGDI, 228kW, 400Nm
6-spd MT, 1402kg
Renault Megane RS Trophy2.0 TGDI, 195kW, 360Nm
6-spd MT, 1401kg
270
235.5
145.2
0.024
0.036
4.7
6.8
250
8.3
7.2
12.0
10.5
2.5
2.8
8.2
7.4
9.0
6.3
8.8
7.67.7
8:08
8.9
7:50
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 5Public
3
4
5
6
7
8
9
10
Road load A0[N]
Road load C0[N/kph²]
0-100[s]
vmax[kph]
Agility[DR]
Stability[DR]
Self-Steering[DR]
max. lateralacceleration
[m/s²]
Body motion[°/g]
Powerfulnessat full load
[DR]
Transientresponse
[DR]
NordschleifeLap time[mm:ss]
Att
ribute
Rating
LAP TIME
EFFICIENCY PERFORMANCE DRIVEABILITYHANDLING
BenchmarkingHandling
DR … AVL-DRIVE Rating
What causes the results and what are findings for the target setting?
Let’s have a deeper look
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 6Public
▪ Very low understeer tendency
▪ Excellent agility
▪ High oversteer stability
▪ Good body control
▪ Moderate traction potential
▪ Excellent understeer tendency
▪ Racecar like agility
▪ Slight lack of oversteer stability
▪ Excellent body control
▪ Moderate traction potential
Honda Civic TypeR
Renault Megane RS Trophy
HandlingOverview
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 7Public
HandlingDeeper Inside into Understeer Tendency
The Renault Megane RS shows excellent understeer characteristic
The Honda TypeR shows a little bit more understeer at the handling limit
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 8Public
3
4
5
6
7
8
9
10
Road load A0[N]
Road load C0[N/kph²]
0-100[s]
vmax[kph]
Agility[DR]
Stability[DR]
Self-Steering[DR]
max. lateralacceleration
[m/s²]
Body motion[°/g]
Powerfulnessat full load
[DR]
Transientresponse
[DR]
NordschleifeLap time[mm:ss]
Att
ribute
Rating
LAP TIME
EFFICIENCY PERFORMANCE DRIVEABILITYHANDLING
BenchmarkingDriveability
What does the Civic different to reach better
performance results?
Let’s have a deeper look
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 9Public
DriveabilityOverview
2015 Honda Civic TypeR
▪ Leading in Full Load Performance with strong low end torque
▪ Quick transient response with moderate bump and acceptable torque build-up
▪ Mid-ranged in take-off capabilities, but highest acceleration level
2012 Renault Megane RS Trophy
▪ Higher dynamic in transient response, strong bump and kick
▪ Good acceleration feel, but less engine free acceleration with earlier rev limitation
▪ Quick gear shifts possible with noticeable jerks
AVL Scatter band
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 10Public
Renault Megane RS is in a leading position for response delay and has a more dynamic character
The Civic shows less responsiveness in lower speeds, which results in an overall slightly lower DRIVE Rating for response delay
DriveabilityDeeper Inside into Transient Responds
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 11Public
Performance
High Moderate
Engaging Relaxed
Driveability
High Low
Energy Efficiency
Dynamic Relaxed
Handling
Translating customers vision into technical requirements down to a very detailed level
Competitor vehicles
High Low
Further attributes:NVH, Ride
Comfort
Objective targets COMFORT
Objective targets SPORTY
Target Setting
Among the best Average
Lap Time
Hyundai i30N
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 12Public
Cornering:
➢ Low understeer, good self steering
➢ Highest lateral acceleration potential
Cornering transient
➢ Stable at power off or braking in a turn
Agility
➢ Very responsive in handling speed range
➢ Good oversteer stability in highly dynamic situations
Longitudinal handling
➢ Slight deficit in traction potential acceptable (FWD)
➢ Moderate straight ahead stability acceptable
Target SettingHandling – High Level Target Band
Hyundai i30 N
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 13Public
Target SettingHandling - Constant Radius Cornering
Cornering:
➢ Low understeer, good self steering
➢ Highest lateral acceleration potential
Cornering transient
➢ Stable at power off or braking in a turn
Agility
➢ Very responsive in handling speed range
➢ Good oversteer stability in highly dynamic situations
Long. Handling
➢ Slight deficit in traction potential acceptable (FWD)
➢ Moderate straight ahead stability acceptable
Constant Radius Cornering
un
derste
er t
en
den
cy
+
| +
lateral acceleration m/s²
Hyundai i30 N
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 14Public
Target SettingHandling – Lane Change
Cornering:
➢ Low understeer, good self steering
➢ Highest lateral acceleration potential
Cornering transient
➢ Stable at power off or braking in a turn
Agility
➢ Very responsive in handling speed range
➢ Good oversteer stability in highly dynamic situations
Long. Handling
➢ Slight deficit in traction potential acceptable (FWD)
➢ Moderate straight ahead stability acceptable
2n
dla
ne o
verste
er
+
entry speed [kph]
sta
ble
ra
nge
unsta
ble
range
transitio
n
range
ISO 3888 T2 Lane change
Hyundai i30 N
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 15Public
What are the Right Technical Measures?
SteeringGear ratio
Ackermann characteristics
Power steering
TyreDimension
Cornering stiffness
Linearity
AeroDrag
Downforce
Efficiency
BodyWeight
Geometry
Stiffness
Sus-pension Spring, damper,
stabilizer
Kinematics
Compliance
EnginePower
Turbo characteristic
Pedal characteristics
Limited-Slip
Differential
Locking characteristics
Ratio
Control strategy
Brake System Disc and pad
Cooling & fading
Controllability
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 16Public
CorrelationValidated AVL VSM Model of HMC i30N
Handling: Constant radius cornering
Handling: Step steer Braking: AMS brake test Lap Time: Nürburgring Nordschleife
Performance: Full load acceleration Steering: Triangle steer
Due to an existing Hyundai i30N prototype vehicle the real measurement data was used to validate the AVL VSM simulation model to ensure that the model matches the real car behavior.
• Understeer & linearity• Max. lateral acceleration• Body roll behavior
• Transient vehicle response• Yaw gain• On center steer feeling
• Brake distance• Brake temperature • Brake fading
• Engine• Gearbox & driveline• Driving resistance
• Vehicle performance• Limit handling • Driver
• Initial lateral response• Vehicle reaction overshoot• Transient amplification
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 17Public
AVL VSM™ SimulationHandling – Steady State Cornering
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 18Public
AVL VSM™ SimulationHandling – Double Lane Change
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 19Public
AVL VSM™ SimulationNürburgring Nordschleife
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 20Public
ImprovementsLap Time @ Nürburgring Nordschleife
4,6
3,4
2,8
1,4
1,00,6 0,4
1,0
0
2,5
5
7,5
10
12,5
15
Hyundai i30N(Prototype)
Tyre N CornerCarving
Differential
Brakecontroller
reinforcements
Geometrysuspension
parts
Roll/Pitchbalance
Toe, camberlinearity
Compliancecharacteristic
OtherImprovements
Hyundai i30N(Production)
Nürb
urg
ring N
ord
schle
ife
Rela
tive L
aptim
e[s
ec]
- N Corner Carving Differential- Base Differential
Target
Walkdown Chart
• eLSD control logic integrated & optimized within AVL VSM
Improved traction at corner exit
• Real brake controller integrated & optimized within AVL VSM
Increased braking performance
(braking distance & stability under consideration of disc temperature)
- Optimized brake controller- Base brake controller
Example: N Corner Carving Differential Example: Brake Controller Reinforcement
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 21Public
ImprovementsExample: Handling
The jump off base for the optimization is a virtual
prototype.
The handling evaluation of the prototype vehicle shows
the gap to the target band.
Hyundai i30 N Prototype
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 22Public
ImprovementsExample: Handling
After the handling optimization using high performance
components and virtual calibration, the vehicles handling
analysis results meet or overshoot the target band.
• UHP tires
• Corner carve differential
• Improved suspension geometry
• K&C optimization
• Modified spring and shock absorber setup (active
shock absorbers)
• Modified steering gear ratio
• Modified aerodynamics
Hyundai i30 N Production
Hyundai i30 N Prototype
| Virtual Concept Definition of Hyundai’s i30N Vehicle| 17 October, 2018 | 23Public
… higher confidence of technology decisions
… less prototype vehicles
… better balancing of vehicle attributes
Conclusion
Virtual Vehicle Concept Development leads to:
www.avl.com
Thank You
Aerial Images: ©GeoBasis-DE / LVermGeoRP (2018), dl-de/by-2-0, http://www.lvermgeo.rlp.deALS terrain model: ©GeoBasis-DE / LVermGeoRP 2016, dl-de/by-2-0, http://www.lvermgeo.rlp.de