The power of the 4.0-liter V8 engine with a double turbocharger exceeds 137 liters. from. per liter of workstation. Flying Spur V8 is more than 709 km, CO2 emissions - 288 g / km, overclocking up to 100 km / h occupies 4.1 seconds.
The new Flying Spur continues more than 60-year tradition Bentley on the use of V8 engines. The version is distinguished by the characteristic deep sound of the engine, an enlarged stroke stock and a reduced CO2 emission level while maintaining stunning dynamic characteristics. It was possible to achieve such an exceptional and impressive combination thanks to the application of the latest engineering solutions and technologies.
The design of the 4.0-liter engine Bentley V8 includes a cylinder block, cast from high-strength aluminum, two turbocharger and primary catalytic neutralizers in the collapse of the cylinder block. Fuel nozzles and spark plugs are located in the center of the combustion chambers. This solution optimizes the spraying of fuel and the combustion process. Switchgears can change the gas distribution phases within 50 ° and turn off the half of the cylinders when the engine is running with a partial load, which turns it into an ideally balanced V-shaped four.
The optimal constructive concept allows the V8 engine to develop high torque and power, as well as demonstrate a decrease in the emissions of harmful substances and maximum efficiency.
The crankshaft with five bearings and lightweight pistons ensure the efficient operation of the compact V-shaped engine. To reduce power losses for friction, the cooling system pump and timing chain are driven directly from the crankshaft using an intermediate shaft. In this engine, the piston stroke is equal to the diameter of the cylinder (86 mm), which guarantees the perfect balance of power and torque. Double turbocharger helps the engine to develop more than 137 liters. from. Power per liter of workstation and overclock Flying Spur V8 to 318 km / h.
The maximum power of the V8 engine is 550 liters. with., At the same time, the maximum torque of 770 nm is achieved already at 2000 rpm and is preserved up to 4500 rpm.
The distinctive feature of the TWIN-SCROLL turbocharger is two separate parallel channels in the turbine housing, along which the spent gases come to the turbine wheel blades. A similar solution acts as a guarantee of the development of high torque at a low rotational speed of the crankshaft. The installation of turbocharger in the collapse of the cylinder block allowed to reduce the distance that spent gases have to overcome from the engine to turbines. The turbocharger shaft can rotate with a frequency of 176,000 rpm and produce pressure to 1.6 bar. An impressive torque is achieved lightning and provides overclocking up to 100 km / h for 4.1 s.
In addition to the location of turbocharger in the collapse of the cylinder block, among the peculiarities of the 8-cylinder power unit - a close arrangement of catalytic neutralizers to them. Such a layout allows the exhaust gas control system to quickly achieve the optimal operating temperature. Warming up catalytic neutralizers accelerates the opening of bypass leaks of turbocharger.
Two high-pressure fuel pumps are driven directly from the camshaft. They supply fuel under pressure up to 250 bar to eight nozzles controlled by electromagnetic valves. The pressure-developed pressure is 14 times higher than the pressure in the vapor boiler, which is necessary for the movement of the 60-ton steam locomotive.
The nozzles are installed in the center of the combustion chambers next to the ignition candles. They spray fuel through seven holes, due to which the optimal spray scheme is achieved and, as a result, the optimal formation of the fuel and air mixture. The special shape of the intake channels contributes to a better air turbulence in the cylinders. Such a turbulent flow improves the distribution of fuel in the cylinder. An additional advantage is more complete combustion, after which less harmful substances are emitted into the atmosphere.
To increase resistance to significant loads and wear, the cylinders are covered with iron alloy using the atmospheric plasma spraying process. As a result, the coating is durable, but at the same time very thin - only 150 microns, that is, as a sheet of paper.
To increase the fuel efficiency at a low load on the engine, when the torque does not exceed 250 N · m, and the speed of rotation of the crankshaft is 3500 rpm, it is possible to disconnect the four cylinders of eight. At the same time, the transition to work on four cylinders is carried out imperceptibly for the driver and passengers and takes only about 20 milliseconds, which is ten times faster than blinking.
The engine uses a system with two-position cams of camshafts of intake and exhaust valves, thanks to which the second, third, fifth and eighth cylinders are turned off. The disabling of four cylinders allows almost 30% to reduce fuel consumption (depending on the load and speed of rotation) and thereby increase the reserve of the stroke and reduce the harmful effect on the environment.
The new Flying Spur V8 is primarily focused on the driver, offering incredible sophistication, comfort and manufacturability, expected from a large luxurious Gran Turismo.
Models of the Flying Spur line got a rapid and simultaneously with this elegant look, formed by the classic design solutions Bentley, as well as the best quality of manufacture and original materials in the class. The new version of Flying Spur V8 is equipped with not only the modern engine, but also the latest drivers for the driver and information and entertainment systems that increase the level of security, security and comfort on each trip.