2011 chevy cruze
TRANSCRIPT
Vehicle Structure• 10-40% improvement depending on body mode
– 42-hertz bending frequency– 40-hertz torsional frequency
• Strong structure allows for better isolation, tuning and NVH
• Structure sealing is optimized– Hollow beam and box sections with fillers/baffles
including door frames
• Efficient use of high-strength steel
Front SuspensionMacPherson Strut Design• De-coupled to separate load paths for
tuning– Separates extreme and harsh load events
(maximum jounce) from normal road inputs
– Provides better isolation under all conditions
– Separates spring and damper loads
• Excellent road holding withprecise handling characteristics
• Reduced NVH
• Hydraulic ride bushings infront aluminum control arms – Ride isolation, quieter performance,
controlled transfer of road input loads
Rear Suspension – Z LinkTorsion Beam – Compound Crank Rear Axle• Patented design where rear axle reacts independently to
individual wheel inputs• Central tubular tuning
element providesside-to-side wheel controlfor greater stability
– Welded to trailing armsusing patented helicalwelding process
– Attached to body with hydraulic ridebushings to reduce road noise andimprove vibration isolation
• Lower mass• Compact packaging• Hydraulic axle bushings for ride
Rear Suspension – Z LinkWatts Link• Allows for separate tuning between ride
and handling for improved vehicle dynamics
• Maintains lateral control and stability
• The linkage usescounter-acting forcesto keep the rear axlecentered under the car
• Flexible design that allows for adjustment of roll-rate and roll-steer to individual engines; vehicle weights,body styles and chassis control systems
SteeringRack-mounted electric power steering system• Dual pinion rack EPS for precise control and
responsiveness• Rack-mounted motor delivers
more direct on-center feel• Speed sensitive system that
responds to amount of assistneeded at any speed– High assistance at low
speed to minimize effort
– Reduced at high speed toinsure steering feel
• Electric power saves fuel and mass– Eliminates energy consuming pump
– Approximately 0.5 mpg improvement
Brakes & Chassis Controls• Four-wheel discs with steel vented
rotors– Front 300 mm x 26 mm– Rear 292 mm x 12 mm– Aluminum front knuckles reduce mass
• Chassis Controls Systems– Four-wheel ABS with electronic
brake force distribution • Provides front to rear proportioning of
braking effort
– Traction control system• Uses brake and engine torque intervention
duringlaunch and acceleration
• Brake limited differential
– Electronic stability control• Works with ABS and traction control system
toapply brakes selectively to maintain control
• Uses yaw sensor, lateral accelerometerand steering angle sensor
Cruze Powertrain Lineup
• Four combinations
1.8L Four-Cylinder
• Standard on Cruze LS
1.4L Turbo• Standard on LT , LTZ &
ECO
6-Speed ManualTransmission
• Standard on LS and ECO
6-Speed Automatic
Transmission• Available on all trims
Ecotec 1.4L Turbo• Developed globally between Germany,
Sweden and the U.S.– Utilized GM’s turbo and small engine
expertise around the globe – Part of the same engine family as Volt– Initial engines supplied from Austria,
soon to be produced in Flint, Mich.
• Best-in-segment fuel efficiency– Among the most fuel efficient four-cylinder
gasoline offerings of its kind in the world– Eco Cruze estimated at 40 mpg highway with
6-speed manual transmission
• Delivers the performance characteristics of a larger displacement engine
Ecotec 1.4L Turbo Performance• Estimated 138 horsepower @ 4900 rpm• Estimated 148 lb-ft of torque @ 1850 rpm • Vehicle performance
– Estimated 0-to-60 mph time is very competitive• Low 9-second range
Integration of the turbo charger in the engine’s exhaust manifold reduces turbo lag and delivers noticeably quick response
Midrange torque is most noticeable in passing situations
• Makes a small engine act big– Fuel economy of a small engine, performance of a larger engine
• Improves mid-range torque– Highway and passing
Usable Power• 138 hp is not what 138 hp used to be• Boost performance (mid-range torque)
when you need it
Engine Speed (RPM)
Torque (lb.-ft.)
1.4 TurboCompetitor enginewith comparable hp
Ecotec 1.4L Turbo
Why a Turbo?
1000 2000 3000 4000 5000 6000 70000
20
40
60
80
100
120
140
160
Intake ManifoldComposite material, electronic throttle body, sequential port fuel injection
Hollow CamshaftLight weight design, low rotating mass
Variable Valve Timing Dual, continuously variable cam phasersReduced fuel consumption, increased performance
Roller Finger Follower andHydraulic Lash Adjuster
Low friction improves fuel consumption, maintenance-free valve train
Poly-V-Belt DriveAutomatic belt tensioner enables maintenance free accessory drive
Front Cover Including Oil and Water PumpVariable displacement oil pump improves fuel consumption
Torsional Vibration DamperReduced torsional vibration, improved NVH
Structural Aluminum Oil PanImproves NVH behavior/PT bending stiffness, high heat transfer, improved sealing
Solid Cast Crankshaft 16-Valve Cylinder Head
Improves performance due to increased air flow, optimized inlet portsOptimized cooling circuit
Turbo ChargerIntegrated design
Oil To Water CoolerCylinder Block/ Bed Plate
Cast iron, no balance shafts
Electronically Controlled Thermostat
Controlled engine heat up and cooling, low fuel consumption, low emissions
Close-Coupled CatalystAchieve Euro 5 and Bin 5 (ULEV) emissions
Chain DriveLow friction improves fuel consumption, lifetime maintenance free
Extended Life CoolantLong Life (100K Mile)
Spark Plugs
Ecotec 1.4L Turbo
Ecotec 1.8L
• Estimated 136 horsepower @ 6300 rpm
• Estimated 123 lb-ft of torque @ 3800 rpm
• 10.5:1 compression ratio• Dual-overhead camshaft
configurationwith four valves per cylinder
• Variable valve timing – Dual continuously variable
camshaft phasing
• Sequential fuel injection• Variable intake manifold• Coil-on-plug ignition• Light weight direct acting hydraulic
tappets with reduced friction• Hollow-cast camshafts
• Oil-water heat exchanger
• Piston-cooling oil jets
• Structural oil pan
• Electronic controlled cooling system
• Extended life coolant
• Long life (100K mile) spark plugs
• Available six-speedautomatic (6T40) – Compact packaging– Quiet operation – Low maintenance
6-Speed Automatic Transmission6-speed transmissions to enhance Cruze fuel efficiency
The compact dimensions of the new 6-speed
OVERVIEW• Compact, capable, and feature-laden
for true global coverage• The new 6-speeds enable improved
fuel economy and performance • Clutch-to-clutch shifting enables
increased functionality • Several manufacturing sites globally• U.S. source Toledo Transmission
FEATURES• Wide 6:1 ratio spread, six speeds
delivering fuel economy and performance • Flexible portfolio• Diesel and gas engine applications with engine torque up to 400 Nm• 4500 lb maximum test weight class• Neutral idle enables improved fuel economy and reduced idle shake• Internal control module (TEHCM) improves underhood packaging
6-Speed FWD/AWD Automatic Transmission A 6-speed engineered for the global market
• Standard six-speed manual (M32)– Three-piece housing structure
enables excellent stability– Fully-synchronized for
smooth, quick gearengagement in allshifting scenarios
– Exceptional NVHcharacteristics
6-Speed Manual Transmission
3-PIECE HOUSING
OVERVIEW:• FWD Manual Transmission• Transmission family comprises (2)
variants– Up to 320 Nm *
* 1st & (Rev) gear limited to 260 (230)Nm /2nd gear to 290 Nm
• 6 Fwd gears /3 Shafts/ 3-piece housing• Hydraulic clutch control / cable shifting• Dual Mass Flywheel provisions• Production plant: Vienna-Aspern
TECHNICAL INFORMATION• Center distances
Input to Output (Differential)– 197mm
Input to Main shaft- Upper– 101.2mm
Input to Main shaft – Lower– 76.5mm
• Overall length: 334mm• Dry weight: 46.7kg • Oil Volume: 1.9L• Gears double usage of 3+5 driving and
1st gear driven idler for reverse operation
• Synchronizer designs 3-cone (1/2),2-cone (3/4) and 1-cone (1/R)
ECO GEAR SET• Triple Overdrive Gear Sets: 4th, 5th
and 6th gears are over drive to allow for improved fuel economy
• 6th gear ratio and final drive designed to provide maximum fuel economy benefit
• Downshifting to 5th gear for excellent passing performance / elasticity
ECO 1ST GEAR AND FINALDRIVE SELECTION
• Final drive selected to improve Fuel Economy and deliver Performance Requirements
• Short 1st gear ratio in combination of tall final drive ratio allows for:– Clutch Durability– Ease of Vehicle Launch– Launch on Grade Capabilities
(32% grade in FWD and 27% grade in reverse at 670m altitude)
GEAR SET UP
6-Speed FWD Manual Transmission Manual 6-speeds engineered for the global market
MZ0-Base MF3-Eco Gearset 1.8L 1.4LTurbo
1st 3,818 4,273
2nd 2,158 2,158
3rd 1,475 1,302
4th 1,067 0,959
5th 0,875 0,744
6th 0,744 0,614
Reverse 3,545 3,818
Final Drive Ratio 3.94 1 3.833
Manual Transmission N/V Ratio Comparisons
Durability and Reliability• Covered by the 100,000-mile/
5-year Powertrain Warranty
• Tested to the same stringentstandards as all other GM engines
• SAE certified horsepower and torque
Safety Systems• Engineered for 5-star safety ratings
– Has achieved 5-star performance inEurope, Korea, China, India and Australia
– Meets new roof crush standards
• 10 airbags standard– Dual-stage front airbags with
passenger sensing system– Front seat knee airbags– Front seat side airbags– Outboard rear seat side airbags– Side head curtain airbags with rollover protection
• Dual front seat belt pretensioner (lap and retractor) systems
Safety Systems• Traction control
• Electronic stability controlwith rollover sensing
• 4-wheel ABS
• OnStar – advanced automatic crash notification
• Break-away pedal assembly
NVH Refinements18 Distinctive Acoustical Treatments• Acoustic laminated windshield with triple
sealing at windshield base• Steel front-of-dash panel sandwiched
between two damping mats • Nylon baffles filled with sound-absorbing
foam in hollow portions of body structure and door headers–expands in paint oven
• Headliner comprises five layers of thermal fiber acoustic material, including premium woven fabric on outer layer
• Sound insulation material between rear-body structural components made from recycled blue jean material
• Doors have triple seals with fiberglass “blankets” for water, airflow and noise barriers.
• Hood absorber• Robotic applied sound deadener to floor pan and body side structure • Decoupled exhaust flex joint and tuned rubber isolators
NVH Refinements
New Engine Mount
• Specifically tuned Neutral Torque Axis engine mounts
– Hydraulic load bearing mounts
– Effectively dampens transfer ofvibration and noise
– Isolated engine cradle
• 6-speed automatic transmission with neutral idle
• Rear Z-Link suspension enablesbushing tuning for improved isolation
Aerodynamics & Mass Reduction• Use of high-strength steels,
gage reduction, weld flange length reduction, scallop
• Belly pan (includes splash protection)
• Tire blockers front and rear
• Front fascia extension panel to the belly pan
• Wheel well liner extensions
• Front end grille close-outs and CRFM baffles
Cruze ECO• Hybrid-like fuel efficiency without the price tag (40
mpg Hwy)• Aerodynamic initiatives of base vehicle plus…
– Lower grille air shutters– Aero blade to deflect air around fuel tank and suspension– Fascia extension to the belly pan, belly pan and
mid-body aero panels to complete underbody shieldingfor laminar flow
– Specific front grille close-outs– Deck lid spoiler– Lowered front fascia air dam– Lowered suspension– Ultra Low rolling resistant 17” tires– Lightweight aluminum wheels
• Aggressive 3.833 final drive ratio
Cruze ECOAir Shutters• First use of active air shutters
for compact cars in U.S.• Improves fuel economy by
reducing aerodynamic drag at highway speeds
• Air shutters close and open based on speed and cooling needs of the engine– Controlled through powertrain
control module
• Drag coefficient reduction of 0.016 Cd
Quality, Reliability, Durability• Cruze is engineered to highest
quality & durability standards– Logged more than 4 million
miles of customer durability testing
– On six continents in the world’s harshest geographic and climatic conditions
– Global vehicle that has been launched and proven in 60 countries