Fiat 500 multiair




Fiat 500 multiair

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  • Fiat's unique system of computer-controlled intake valves allows a small car like the to produce a surprising hp and plenty of low-rpm.

    Learn more about the Fiat's Multiair Valve-Lift System Explained - Article. Read a review and see pictures of the Fiat's Multiair Valve-Lift System Explained at Car.

    Heisner, Blaine M. and Croxell, Andrew M. "Fiat MultiAir System: Operation, L “Tigershark”-MultiAir 2. Page 4. FCA Vehicles. Fiat Jeep Cherokee.

    Fiat 500 multiair

    Fiat 500 multiair

    Please enter a valid email address. The system also provides smoother cold weather operation, more even torque delivery and no engine shake at shut-off. The original Fiat was similarly equipped. An evening in front of the telly. The Mac Mini heralds a return to memory slots!

    Fiat 500 multiair

    Fiat 500 multiair

    Fiat 500 multiair

    Fiat 500 multiair

    Fiat 500 multiair

    Chrysler to Build Fiat L MultiAir Engine in U.S. - Motor Trend

    At the Los Angeles Auto Show, Fiat unveiled the Fiat Abarth—a performance variant of the —featuring the first application of the new 1. The turbocharged, twin intercooled and MultiAir-equipped earlier post 1. Bore is 72 mm 2. At the bottom end, a forged-steel crankshaft with select-fit main bearings is supported across four main journals. The crankshaft has been designed with lightened counterweights to reduce overall mass for high engine rpm operation.

    The use of lightweight forged-steel connecting rods that have been designed with a unique cross section to minimize the longitudinal and lateral bending of the rod enhances durability. Full-floating piston pins are used for added strength. Piston cooling jets, located at the bottom of each cylinder, contribute to fuel economy by squirting oil on the bottom of the pistons to help maintain cylinder temperatures and reduce the possibility of hot spots along the cylinder walls or at the top of the piston that could lead to detonation.

    Fiat 500 multiair

    For optimum fuel economy and performance, fuel with a 91 octane rating is preferred; regular 87 octane is acceptable. Crankcase capacity is 4. Synthetic 5W engine oil is recommended, due to higher overall temperatures with the turbocharger. To maintain a lower ownership cost for the Fiat Abarth, oil change intervals are set at 8, miles.

    The valve train for the 1. Unlike engines that rely on direct action from fixed lobes on the camshaft to control intake valve opening and closing, MultiAir is an electro-hydraulic system that can control intake air, cylinder by cylinder and stroke by stroke depending on the demands from the standard electronic throttle control ETC system. Actual opening of the valves is controlled by hydraulic fluid running through a narrow passage that is controlled by a dual-action solenoid.

    Fiat 500 multiair

    When the solenoid is closed, under highway speeds or full acceleration, intake valves are fully open much like a traditional engine for maximum power. At lower speeds, the solenoid opens, allowing oil to bypass the passage, decoupling the valves.

    This allows for infinite control of the valves and controls the amount of fresh air into the cylinders, reducing wasted energy that is common with fixed intake lobes on a camshaft. Spent exhaust gases are released through traditional lobes on the camshaft and exit through a cast stainless steel exhaust manifold. Ignition is through a single output, coil-on-plug system.

    Spark plugs are dual precious metal for durability. Fuel delivery is sequential, multi-port, electronic, with injectors located to direct the fuel spray at the intake valves in a wide spray pattern that increases fuel atomization and enhances complete combustion for a smooth driving experience. MultiAir technology on normally-aspirated 1. The turbocharger spins up to , rpm to convert exhaust heat and pressure to a rotational force that drives a compressor.

    Fiat 500 multiair

    The compressor draws cool air and pumps it into the intake manifold at increased pressure that results in a greater amount of air in the cylinder and hence more power. The intercoolers are designed to remove heat in the air charge that the turbocharger generates while compressing incoming air higher air density for more power. Reducing heat provides a cooler, denser air charge that helps increase the potential for more power.

    A cooler air charge also reduces the potential for engine knock. The new Fiat Abarth also features several engine system component upgrades needed for high-performance driving. On the intake side, the 1. An upgraded electrical system includes a high-output amp alternator and amp cold-cranking maintenance-free battery for increased vehicle system charging.

    Abarth 500 MultiAir Upgrade and a new Torsion Bar - Episode 3



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