Virtual Concept Definition of Hyundai’s i30N Vehicle Mario ...

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 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

../AVL VSM Product/AVL VSM 3D-Viewer Demo.mkv


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


3

4

5

6

7

8

9

10

Road load A0[N]


0-100[s]

vmax[kph]

Agility[DR]

Stability[DR]

Self-Steering[DR]


[m/s²]

Body motion[°/g]


[DR]

Transientresponse

[DR]


Att

ribute

Rating

LAP TIME


BenchmarkingHandling

DR … AVL-DRIVE Rating

What causes the results and what are findings for the target setting?

Let’s have a deeper look


▪ 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


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


3

4

5

6

7

8

9

10

Road load A0[N]


0-100[s]

vmax[kph]

Agility[DR]

Stability[DR]

Self-Steering[DR]


[m/s²]

Body motion[°/g]


[DR]

Transientresponse

[DR]


Att

ribute

Rating

LAP TIME


BenchmarkingDriveability

What does the Civic different to reach better

performance results?

Let’s have a deeper look


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


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


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


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


Target SettingHandling - Constant Radius Cornering

Cornering:



Cornering transient


Agility



Long. Handling



Constant Radius Cornering

un

derste

er t

en

den

cy

+

| +

lateral acceleration m/s²

Hyundai i30 N


Target SettingHandling – Lane Change

Cornering:



Cornering transient


Agility



Long. Handling



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


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


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


AVL VSM™ SimulationHandling – Steady State Cornering


AVL VSM™ SimulationHandling – Double Lane Change


AVL VSM™ SimulationNürburgring Nordschleife


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


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


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


… 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

Virtual Concept Definition of Hyundai’s i30N Vehicle Mario ...

Documents