Information AboutTurbodiesel |
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with a modern common rail turbodiesel engine with variable geometry turbocharger, double overhead camshafts and 16 valves]] This type of engine was first introduced in a production car in May 1978 in the Mercedes 300SD (series W116 , engine OM617.950 ), only produced for the United States . In Europe , its first application was in the Peugeot 604 in early 1979 (model year 1978). CHARACTERISTICS The improvements to power, fuel economy and diesels, which have strong low-speed Torque outputs but lack power at higher speeds. Turbodiesels can be designed to have a more acceptable spread of both power and torque over their speed range or, if being built for commercial use, can be designed to improve either torque or power at a given speed depending on the exact use. Turbochargers are in many ways more suited to operation in diesel engines. The smaller speed range that Diesel engines work in (between 1000 and 5000 Rpm for a private car, and as little as 1000-2500 rpm for a larger unit in a Commercial Vehicle ) mean that the turbocharger has to change speed less, reducing Turbo Lag and improving efficiency. Diesel engines do not require Dump Valve s (see the Turbocharger article for more information) and have lower exhaust temperatures which reduces stress on the Turbine blades. The turbodiesel engine can also help with the amount of torque it can give out. Commonly used in trucks, it helps improve the towing capacity of a truck, as well as Fuel Economy . TURBODIESELS IN THE UNITED STATES During the 1990s, turbodiesel engines were mainly used in the United States for Light Truck s. An example is the Ford Power Stroke Engine series, mounted on Ford F-Series Super Duty Pickup Truck s, the E-series Van s and the Excursion Sport Utility Vehicle s. As Diesel sold in the United States had a high rate of Sulphur , modern engines developed in Europe would have reliability problems, so very few Sedan s, Station Wagon s and Hatchback s were sold with diesel engines. After Ultra Low Sulphur Diesel was introduced in the United States in 2006, automakers began to develop turbodiesels which could take advantage of it to reduce emissions. Manufacturers like Volkswagen have been releasing cars with four and six-cylinder turbodiesels. Mercedes reintroduced turbodiesel technology with the 2005 E320 CDI . Boasting a 0-100 km/h (0-62 mph) time of 6.6 s and fuel consumption of 37 Mpg , the full year production estimate of 3000 CDIs were ordered within five months. Even more recently, however, Mercedes introduced the BlueTec diesel engine. Offering a 3.0 liter V6, as well as urea injection and particulate filters, the E320 BlueTec has been named the cleanest turbodiesel offered in the United States. SEE ALSO |
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