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SAE technical paper series, Volume 2009-36-0245.
The main focus of this work is to study variable compression ratio engines. The study begins with an analyze of the benefits of a variable compression ratio... 
Variable compression ratio engines | Kinematics | Vehicle dynamics
eJournal
SAE technical paper series, Volume 2002-01-1940.
A new variable compression ratio mechanism is described. This mechanism displays high durability, fast response, precision control, and low cost... 
Diesel / Compression Ignition engines | Performance tests | Variable compression ratio engines | Fuel economy | Emissions control | Spark ignition engines | Emissions
eJournal
SAE technical paper series, Volume 891750.
In Two Stroke Spark Ignition engines the thermal efficiency increases with increase in compression ratio... 
Lean burn engines | Variable compression ratio engines | Simulation and modeling | Spark ignition engines | Engine cylinders
eJournal
SAE technical paper series, Volume 2001-24-0050.
Downsizing is an effective way to further improve the efficiency of SI engines. To make most of this concept, the compression ratio has to be adjusted during engine operation... 
Variable compression ratio engines | Crankshafts | Spark ignition engines
eJournal
SAE technical paper series, Volume 2007-01-3547.
An engine compression ratio control system, consisting of a multiple-link mechanism, must be capable of both varying and holding the compression ratio under a condition of torque fluctuations caused... 
Variable compression ratio engines | Drivetrains
eJournal
SAE technical paper series, Volume 2004-01-2931.
.... Downsized supercharged Variable Compression Ratio engines allow for a 30% fuel consumption reduction while providing high power and torque and opening the way to numerous pollutants emissions reduction strategies... 
Gears | Variable compression ratio engines | Noise | Gasoline | Fuel additives | Spark ignition engines
eJournal
SAE technical paper series, Volume 2004-01-1971.
Homogeneous Charge Compression Ignition (HCCI) experiments were performed in a variable compression ratio single cylinder engine... 
Diesel / Compression Ignition engines | Performance tests | Variable compression ratio engines | Mathematical models
eJournal
SAE technical paper series, Volume 2003-01-0398.
Potential benefits of Variable Compression Ratio (VCR) spark ignition engines are presented, based on an examination of the relationship between Compression Ratio, BMEP and spark advance at light load and full load... 
Variable compression ratio engines | Emissions control | Spark ignition engines
eJournal
SAE technical paper series, Volume 2016-01-0565.
...) engines were selected by EPA for an internal engine development program based upon their high geometric compression ratio (14... 
Combustion and combustion processes | Exhaust gas recirculation (EGR) | Variable valve timing | Spark ignition engines
eJournal
SAE technical paper series, Volume 2002-01-1103.
.... However, a fixed compression ratio normally leads to a compromise, in that the charged engine is more of a performance enhancement than an improver of fuel economy... 
Exhaust emissions | Variable compression ratio engines | Crankshafts | Fuel economy | Spark ignition engines
eJournal
SAE technical paper series, Volume 2003-01-1829.
... (PFI). HCCI combustion control is achieved with Variable Compression Ratio (VCR) and inlet air preheating with exhaust heat... 
Diesel / Compression Ignition engines | Performance tests | Variable compression ratio engines | HCCI engines
eJournal
SAE technical paper series, Volume 2007-01-4076.
The effects of variable compression ratio (CR) and fuel composition on thermal efficiency were investigated in a homogeneous charge compression ignition (HCCI... 
Diesel / Compression Ignition engines | Performance tests | Variable compression ratio engines | HCCI engines | Diesel fuels | Alternative fuels
eJournal
SAE technical paper series, Volume 2012-01-0414.
... that must be done both in design and technology domains. As the powerful remedy, a new generation of combustion engines fitted with the variable compression ratio (VCR... 
Variable compression ratio engines | Combustion chambers
eJournal
SAE technical paper series, Volume 870610.
.... This provided control criteria over the entire engine map, making it possible to adjust the compression ratio with respect to optimum... 
Variable compression ratio engines | Nitrogen oxides | Spark ignition engines
eJournal
SAE technical paper series, Volume 910484.
A production, direct injection diesel engine was modified to incorporate BP Oil's novel variable compression ratio (VCR) engine concept... 
Diesel exhaust emissions | Diesel / Compression Ignition engines | Variable compression ratio engines | Vehicle performance | Combustion chambers | Emissions
eJournal
SAE technical paper series, Volume 2006-01-0616.
... the optimum compression ratio matching the operating conditions. This multiple-link variable compression ratio (VCR... 
Pistons | Variable compression ratio engines | Crankshafts | Vehicle performance | Spark ignition engines
eJournal
SAE technical paper series, Volume 2016-01-0669.
.... Variable Compression Ratio (VCR) is one such measure. This work reviews the technological advancements in the design of a VCR engine... 
Combustion and combustion processes | Exhaust emissions | Variable compression ratio engines | Downsizing
eJournal
SAE technical paper series, Volume 2007-01-4115.
An internal-combustion engine platform that may operate on a portfolio of cycles for increased engine expansion ratio, combustion under constant volume, variable compression ratio, and cold start is introduced... 
Thermodynamics | Variable compression ratio engines | Mathematical models | Diesel fuels | Combustion chambers | Alternative fuels
eJournal
SAE technical paper series, Volume 2005-01-3131.
The MCE-5 VCR engine includes a gear mechanism, which transmits the piston motion to the crankshaft via the connecting rod... 
Design processes | CAD, CAM, and CAE | Electronic control systems | Coatings, colorants, and finishes | Performance tests | Gears | Variable compression ratio engines | Kinematics | Product development | Emissions measurement | Alternative fuels
eJournal
SAE technical paper series, Volume 710831.
.... Compression ratio changes were effected by piston changes only. Except for necessary ignition timing modifications, no other changes were made in the engine... 
Performance tests | Exhaust emissions | Variable compression ratio engines | Ignition timing
eJournal
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