A forged steel crankshaft with integrated
balancing shaft drive, weight - optimized piston and forged conrod contributes to the high level of performance within the engine through reduced frictional coefficients.
Not exact matches
They're intended to work like conventional
balance shafts, countering vibration the three pumping pistons generate on the crank without the efficiency reduction that belt - or gear -
driven balance shafts necessarily create.
In some engines a timing belt can also
drive additional components such as a water pump,
balance shaft, intermediate
shaft, injection pump and an oil pump.
The
drive shaft was professionally turned and
balanced, and the rear end was completely rebuilt.
That's why it comes with a helical limited slip differential, dual - axis front struts and
balanced drive shafts, which are claimed to cut torque - steer by «up to 55 percent».
Consisting of a pair of chain -
driven counter-rotating
shafts located in the oil pan, the
balancing system helps quell the inherent second - order harmonic vibrations that normally impact inline 4 - cylinder engines.
To ensure the
balance one expects from a car with sporting pretensions, Alfa has done everything it can to reduce weight, including using a carbon - fiber propeller
shaft to
drive the rear wheels, and to make sure the weight is evenly spread.
The rear - biased system provides a handling
balance of neutral that borders on oversteer, and has a trick «drift mode» that disengages the front
drive shafts entirely to route all power to the rear tires — or rather what's left of them.
The two
balance shafts are inserted in tunnels from the rear end of the cylinder block and are
driven by an inverted - tooth chain.
* Dual overhead camshafts (DOHC) and four valves per cylinder * Twin counter-rotating
balance shafts for operational smoothness * Electronic throttle control * Low - friction, roller - finger follower valvetrain with hydraulic lash adjusters * Low - maintenance chain -
drive for the camshafts * 58X crankshaft positioning * Direct - mount accessories, which reduce or eliminate traditional sources of noise and vibration * Full - circle transmission mount to reduce noise and vibration * GM Oil Life System, which can reduce the frequency for oil changes * Innovative cast - in oil filter housing, which eliminates the need to crawl under the vehicle to perform oil changes and eliminates throwaway oil filter cans that retain used oil
The EA288 Gen3B retains many key features of its predecessors, from chain -
driven double overhead camshafts to the twin
balance shafts that not only counteract second - order internal forces but provide oil scavenging and crankcase breathing pathways.
Additional engine features: Iron cylinder block and aluminum DOHC cylinder head Forged steel crankshaft and connecting rods Oiling circuit that includes a dedicated feed for the turbocharger to provide increased pressure at the turbo and faster oil delivery Piston - cooling oil jets 16.5:1 compression ratio Common rail direct injection fuel system Ceramic glow plugs for shorter heat - up times and higher glow temperatures
Balance shaft that contributes to smoothness and
drives the oil pump Laminated steel oil pan with upper aluminum section that contributes to engine rigidity and quietness B20 bio-diesel capability The Duramax 2.8 L is the cleanest diesel truck engine ever produced by General Motors, and meets some of the toughest U.S. emissions standards, thanks in part to a cooled exhaust gas recirculation (EGR) system.
Iron cylinder block and aluminum DOHC cylinder head Forged steel crankshaft and connecting rods Oiling circuit that includes a dedicated feed for the turbocharger to provide increased pressure at the turbo and faster oil delivery Piston - cooling oil jets 16.5:1 compression ratio Common rail direct injection fuel system Ceramic glow plugs for shorter heat - up times and higher glow temperatures
Balance shaft that contributes to smoothness and
drives the oil pump Laminated steel oil pan with upper aluminum section that contributes to engine rigidity and quietness B20 bio-diesel capability.
The oil pump and the two
balance shaft are
driven by separate chains, making it 3 chains in total.
Dual in - block
balance shafts were integral to the design, the power - steering pump was mounted directly to the cylinder head and
driven by the intake camshaft, the water - pump housing was cast into the block, and the A / C compressor and alternator were mounted directly on the block without brackets.