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Ever-tightening emissions requirements, teamed with consumers' lust for today's high horsepower numbers, have led to some creative valve timing and lift schemes. Infiniti's G37 will be pack some interesting tech underhood when it debuts at the upcoming New York International Auto Show. There are actually two new developments working in conjunction to give independent control over valve timing and lift. Nissan has dubbed the control technologies Variable Valve Event and Lift and Continuous Valve Timing control, or VVEL and C-VTC, respectively. VVEL uses a clever arrangement of links to actuate the valves, and moves the fulcrum for the links via a seperate shaft actuated by a DC motor. By moving the fulcrum, the valve lift is varied.

More after the jump, along with press release

[Source: Nissan via Gizmag]

Continue reading New York Preview: Nissan to introduce new variable valve timing tech

New York Preview: Nissan to introduce new variable valve timing tech originally appeared on Autoblog on Sun, 01 Apr 2007 11:29:00 EST. Please see our terms for use of feeds.

Read | Permalink | Email this | Comments]]>autoAuto ShowAutoShowcontrolemissionsengineengine managementEngineManagementG37greeninfinitiliftmanagementNew YorkNewYorknissanperformanceshowtechnologytimingvalvevalve liftvalve timingValveLiftValveTimingvariablevariable liftvariable valve timingVariableLiftVariableValveTimingSun, 01 Apr 2007 11:29:00 EST<![CDATA[GM unveils high-output direct injection V6]]>http://www.autoblog.com/2006/05/19/gm-unveils-high-output-direct-injection-v6/http://www.autoblog.com/2006/05/19/gm-unveils-high-output-direct-injection-v6/http://www.autoblog.com/2006/05/19/gm-unveils-high-output-direct-injection-v6/#commentsFiled under: , ,

Amidst the "19 new engines" announcement from General Motors Thursday was a brand-new engine of particular significance for the power-hungry (and aren't we all?): a 3.6 liter all-aluminum V6 with direct injection and variable valve timing. The new V6 is promised for the 2008 model year, with a launch vehicle "to be announced."

Destined to be GM's highest specific output non-turbo engine, the new V6 sounds like a natural for the V6 versions of the new Camaro. The new engine promises a 15 percent boost in horsepower over GM's current V6 powerplants, accompanied by an 8 percent increase in torque. Lower emissions and better fuel economy accompany the power boost.

Features of the high-tech V6 include:
  • Aluminum engine block and cylinder heads
  • Dual overhead cams with four valves per cylinder and silent chain primary drive
  • High-pressure, engine-driven fuel pump
  • Advanced multi-outlet fuel injectors developed to withstand high pressure and heat
  • Stainless steel, variable pressure fuel rail
  • Four-cam phasing (VVT - see description below)
  • 11.3:1 compression ratio
  • Aluminum pistons with floating wrist pins and oil squirters
  • Polymer coated piston skirts
  • Forged steel crankshaft
  • Sinter-forged connecting rods
  • Structural cast-aluminum oil pan with steel baffles
  • Electronic throttle control with integrated cruise control
  • Coil-on-plug ignition
  • Advanced direct injection capable engine control module (ECM)

[Source: GM]

GM unveils high-output direct injection V6 originally appeared on Autoblog on Fri, 19 May 2006 10:03:00 EST. Please see our terms for use of feeds.

Permalink | Email this | Comments]]>3.6 Liter3.6Literdirect injectionhigh outputHighOutputV6variable valve timingvvtFri, 19 May 2006 10:03:00 EST