Homogenous Charge compression Ignition

Direction Of Auto ICE Lower Displacement Hybrid technologies Alternative Fuels Turbocharging EPA regulations (HCCI has seemed to die off)

(Road Map) History Concept/Theory Pros Cons Differences from CI and SI

HCCI in the future Conclusion Whats driving it forward? How soon can we expect it?

Paving the way for HCCI Variable Valve timing Variable Compression Ratio Gas Direct Injection (GDI) Exhaust Gas recirculation (up to 60% EGR compared to 15% SI) *double check*

Variable valve lift Cylinder pressure sensing Electric cam phasing

Pros/Cons Advantages Comparisons to SI Comparisons to CI

Overall advantages/disadvantages

GM HCCI animation

Comparisons to SI Elimination of throttling losses Higher compression ratio Shorter combustion duration Lower NOx emissions

HCCI vs SI flame propagation

Comparison to CI Lower emissions of PM and NOx Dilute homogenous air and fuel mix Low combustion temperature(800-1100K) 1900-2100K for CI engines must be reached

Combustion duration is shorter Lower cost due to lower pressure fuel injection

Advantages Fuel flexibility Fueled with gasoline or diesel Low emissions

Disadvantages Controlling ignition timing over range of speeds Extending operating range to high loads Noise-rapid and intense combustion process Cold start capability Hydrocarbon and carbon monoxide emissions

The Future of HCCITwo Questions

1. What is Driving this Technology into the Future? 2. When can we Expect to see this Technology on the Road?

Pushing Companies Forward1. CAF Standards

2. Unstable Gas Prices

3. Emissions Standards

CAF Standards Light duty vehicles are responsible for about 60 percent of U.S. transportation petroleum consumption!

http://www.caranddriver.com/features/10q2/how_auto makers_will_meet_2016_cafe_standards-feature

Unstable Gas Prices

A May 2006 Consumer Reports study showed that elevated gas prices were having a significant impact on the American lifestyle, with 37 percent of the nationwide survey respondents reporting that they were considering replacing their current vehicle for one with greater fuel economy.http://editorial.autos.msn.com/article.aspx?cp-documentid=435618 http://www.roperld.com/science/minerals/Oil&USGasolinePricesPrediction.htm

Emissions StandardsAn equation [using] CO2 concentrations since 1965, coupled with lower emissions estimates, predicts that CO2 concentrations will peak at 412 ppm in 2034 and then decline. ~EPA

STILL NEEDS WORK

How Soon?!Operational Range Electronic Controls

Cold Start Idle High RPM Acceleration

Cost $ Life CycleToday, due in large part to incredible computer advances and ever-improving engine valve control systems, it is now technologically feasible to control HCCI combustion. ~MotorTrend

Because of some technical issues and excess noise and vibration, HCCI engines currently operate best in low-load, nonidling situations. ~MoterTrend

http://blogs.motortrend.com/ambitious-achievable-interim-cafe-32-mpg-by-2015-1835.html

How Soon!? HybridElectric, 2012 Volt

HCCI, 2016 Saturn Aura

Questions