and Mehta, P.S., "Predictions of Tumble and Turbulence in Four-Valve Pentroof
Spark Ignition Engines," International journal of Engine Research 2(3):209-227, 2001, doi:10.1243/1468087011545442.
The engine head has a 40[degrees] pentroof
design, with centrally located spark plug and DI injector.
The combustion chamber features a very high efficiency pentroof
design in which the top of the combustion chamber is angled.
That same year, across the Pacific, Honda was rediscovering the pentroof
four-valve combustion chamber, first raced by Peugeot in 1913.
Experiments were performed using a direct injected single-cylinder metal engine with a prototype Volvo pentroof
cylinder head; details of the engine's specifications are presented in Table 1.
The combustion chamber features a shallow with valves flush with the pentroof
Engine specifications Engine Type 4-valve Compression Ignition Displacement 1.8 L Bore x Stroke x Rod 82.0x85.2 x 148.2 mm Compression ratio ~15:1 Cylinder Head Shallow Pentroof
10 degree Swirl and Squish Minimum Mixture Motion Piston GDCI Omega Oil Jets Enhanced Individual-Cylinder Cylinder Pressure Rating 200 bar Fuel Injection System Central Mount, 400 bar GDI Multi-hole DOHC Type II Valvetrain Exhaust Only- Exhaust Rebreathing Boost System 2-Stage (Turbo and Supercharger) EGR System Cooled Low Pressure EGR Loop Thermal Management Low and High Temperature Loops Aftertreatment 2 Gasoline Oxidation Catalysts Table 2.
The engine utilized a production four-valve, pentroof
cylinder head with an 86mm bore.
Engine Type 4-valve Compression Ignition Chamber Shallow 10-deg Pentroof
Displacement 450 cc per Cylinder Bore x Stroke x Rod 82 x 85.2 x 144.7mm Compression Ratio =15:1 Cyl.
Engine Type 4-valve Compression Ignition Fuel US Gasoline RON 91 E10 Displacement 1.8 L Bore x Stroke x Rod 82 x 85.2 x 148.2 mm Compression Ratio ~ 15:1 Chamber Shallow Pentroof
10 deg Swirl and Squish Minimal Mixture Motion Piston GDCI Omega Oil Jets Enhanced Individual-Cylinder Cylinder Pressure Rating 200 bar Injection System Central Mount, 400 bar GDi Multi-hole DOHC Type II Valvetrain Exhaust Only--Exhaust Rebreathing Boost 2-Stage (Turbo and Super) EGR Low Pressure EGR Cooled Thermal Management Low and High Temperature Loops Aftertreatment Gasoline Oxidation Catalyst Lube Oil Full Synthetic 0W-30 Table 5.
A 4-valve single-cylinder engine with a pentroof
combustion chamber was used.
"Predictions of tumble and turbulence in four-valve pentroof
spark ignition engines", International Journal of Engine Research.