Showing posts with label engine. Show all posts
Showing posts with label engine. Show all posts
Monday, May 20, 2013
2012 Ducati Superquadro 195hp L twin Engine Review
Ducati 1199 Panigale "Superquadro" power house revealed
Ducatis latest engine, the Superquadro, goes beyond the barriers of engineering to enable the introduction of a futuristic Superbike today. Ducati engineers were given a near impossible design brief to create the new generation Superbike engine for the Ducati 1199 Panigale. 2012 Ducati Superquadro 195hp L-twin Engine Features and Benefits
This has enabled the engine to be positioned 32mm further forwards for improved front / rear weight distribution in addition to perfectly positioning the cylinder head attachment points for the 1199 Panigales monocoque frame.
In addition to cylinder position, the crankcases now use shell main bearings for the crankshaft, previously only used by Ducati on the Desmosedici RR engine.
Extreme dimensions
In calculating the optimum configuration to achieve the next big step forward in power output for the L-twin engine, Ducati and Ducati Corse engineers increased engine speed and enhanced breathability with the incredible bore and stroke of 112mm x 60.8mm. The new bore and stroke ratio of 1.84:1 effectively increases rpm with the ultra-short stroke of the crankshaft and increases the cylinder area to enable increased valves diameters. Inlet valves have increased from 43.5 to 46.8mm and exhaust valves from 34.5 to 38.2mm.
Using technology developed by Ducati Corse, the design enables reliable operation of the 112mm diameter pistons when performing at high rpm.
Clean power
With such enhanced "breathing", the challenge for the Superquadros Design Engineers was to program performance-optimised fuel mapping for a smoother cycle-to-cycle engine operation, without compromising emissions. Desmo dependent
With such an extreme engine, never before has Ducatis unique Desmodromic system been so vitally important. With the high engine speeds at which the Superquadro operates combined with such large valves, it would be impossible for the valves rocker-arm to follow the steep closure profile of the cam lobe using normal valve closure springs. The Desmo system actuates valve closure mechanically with the same method and accuracy as it opens, enabling steep cam profiles, radical cam timings, large valves and high operating speeds. New transmission
Ducatis engineers also capitalised on the opportunity of the "blank canvas" project to increase dimension between the centres of the six-speed gearbox shafts, enabling larger diameter, stronger gears to transmit the enhanced power output. The Superquadro is the most powerful twin-cylinder production engine on the planet and is destined to power the new Ducati 1199 Panigale with absolute performance perfection.
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Ducatis latest engine, the Superquadro, goes beyond the barriers of engineering to enable the introduction of a futuristic Superbike today. Ducati engineers were given a near impossible design brief to create the new generation Superbike engine for the Ducati 1199 Panigale. 2012 Ducati Superquadro 195hp L-twin Engine Features and Benefits
In addition to cylinder position, the crankcases now use shell main bearings for the crankshaft, previously only used by Ducati on the Desmosedici RR engine.
Extreme dimensions
In calculating the optimum configuration to achieve the next big step forward in power output for the L-twin engine, Ducati and Ducati Corse engineers increased engine speed and enhanced breathability with the incredible bore and stroke of 112mm x 60.8mm. The new bore and stroke ratio of 1.84:1 effectively increases rpm with the ultra-short stroke of the crankshaft and increases the cylinder area to enable increased valves diameters. Inlet valves have increased from 43.5 to 46.8mm and exhaust valves from 34.5 to 38.2mm.
Using technology developed by Ducati Corse, the design enables reliable operation of the 112mm diameter pistons when performing at high rpm.
Clean power
With such enhanced "breathing", the challenge for the Superquadros Design Engineers was to program performance-optimised fuel mapping for a smoother cycle-to-cycle engine operation, without compromising emissions. Desmo dependent
With such an extreme engine, never before has Ducatis unique Desmodromic system been so vitally important. With the high engine speeds at which the Superquadro operates combined with such large valves, it would be impossible for the valves rocker-arm to follow the steep closure profile of the cam lobe using normal valve closure springs. The Desmo system actuates valve closure mechanically with the same method and accuracy as it opens, enabling steep cam profiles, radical cam timings, large valves and high operating speeds. New transmission
Ducatis engineers also capitalised on the opportunity of the "blank canvas" project to increase dimension between the centres of the six-speed gearbox shafts, enabling larger diameter, stronger gears to transmit the enhanced power output. The Superquadro is the most powerful twin-cylinder production engine on the planet and is destined to power the new Ducati 1199 Panigale with absolute performance perfection.
Monday, May 13, 2013
2009 Honda CRF450R Engine Drivetrain Features
All-new engine spins faster--11,450 rpm--and harder, churning out 56.3 bhp at 8500 rpm and 37.5 lb./ft. of torque at 7000 rpm.
Liquid-cooled four-valve Unicam® 449cc engine produces more than 125.3 hp per liter and now utilizes a four-lobe camshaft and individual rocker arms for each exhaust valve to reduce weight and contribute to higher rpm ceiling.
Engine completely redesigned to lower the overall height and position it closer to front wheel, resulting in a lower overall Cg and better weight distribution for better handling.
Engine completely redesigned to lower the overall height and position it closer to front wheel, resulting in a lower overall Cg and better weight distribution for better handling.
Engine height reduced by shortening length of connecting rod 3.5mm (105.6 to 102.1mm) to allow shorter cylinder.
Relocated crankshaft main journal cradles (inside of flywheels) allows reduction of connecting rod big-end diameter (34 to 33mm), reducing weight while maintaining overall strength.
Crankshaft cutaway eliminates piston skirt contact at BDC, also reducing weight.
Reshaped cylinder head combustion chamber is shorter yet has a larger volume squish area for better flame propagation.
Lightweight titanium intake valves and redesigned valve springs reduce overall engine height and permit higher rpm. New intake valve stem diameters reduced (5.5 to 5.0mm).
Lower camshaft mount built into the cylinder head to reduce weight and engine height.
Cam sprocket now press-fitted to camshaft, reducing weight by 20 grams compared to previous bolted design.
Cylinder attaches to engines cases with through-bolts instead of studs, allowing in-frame cylinder removal.
New forged slipper-piston material permits thinner crown, contributing to shorter cylinder height. Low-friction surface treatment assures high-rev potential.
Lightweight Ni-SiC cylinder lining provides cooler and quieter operation for extended engine life.
Redesigned, lighter auto decompression system and hot restart procedure is simplified with cam-integrated plunger and shaft-integrated decompression weight for easy starting in hot or cold conditions.
Redesigned, lighter auto decompression system and hot restart procedure is simplified with cam-integrated plunger and shaft-integrated decompression weight for easy starting in hot or cold conditions.
All-new Programmed Fuel Injection system (PGM-FI) utilizes a 50mm throttle body design with 12-hole injection nozzle fed by lightweight 50-psi pump to ensure optimum fuel atomization and precisely targeted fuel charge. System also achieves an improvement in fuel consumption.
PGM-FI system monitors throttle position, intake air and coolant temperatures, air pressure and gear position to accurately map fuel charge and ignition spark, significantly improving partial-throttle response and helping assure excellent rideability.
AC generator enlarged to service PGM-FI system. Two crankshaft position sensors quickly determine crank position to provide quick starts, hot or cold.
Twin-sump lubrication system separates the oil supply for the crankshaft, piston and valve train from the clutch and transmission. This ensures a cool supply of oil to the clutch, eliminates clutch and transmission material contamination of the engine oil and reduces the amount of circulating oil, allowing the oil pump size to be reduced.
Redesigned exhaust system incorporates a left-side cylinder head exhaust port, increasing header length and allows muffler to be positioned closer to center of mass, contributing to significantly improved weight distribution and handling.
Gear-driven balancer reduces vibration and drives the water pump.
New mechanical water pump seal improves durability.
New mechanical water pump seal improves durability.
Coolant flow rerouted outside engine cases via bolt-on flange/jacket, allowing reduction of crankcase and cylinder width, and overall weight.
Oil pump strainer now built into the engine case to reduce parts and weight.
Eight clutch plates handle the engine’s massive torque while the number of clutch springs is reduced from six to four. This reduces centrifugal weight, allowing the engine to rev quicker.
Kashima coating applied to the clutch basket, clutch center and pressure plate improve clutch life and clutch feel.
Numerous transmission modifications narrow transmission width and reduce weight without sacrificing durability.
Numerous transmission modifications narrow transmission width and reduce weight without sacrificing durability.
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