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Navistar DT466 Engine Specifications & Application

Navistar DT engine Series consists of 6 mid-range Diesel Engines. So, the horsepower ranges from 130Kw/170hp to 260KW/350hp. DT series engines are part of medium range heavy duty automotive like trucks, school buses, and other buses applications. Whereas other engines serve in the service applications.

Navistar International previously known as International Harvest company was producing diesel engines mainly for Agricultural and construction equipment.

The dt466 engine being considered legend among DT engine Series because of its endurance and performance. There is a famous saying regarding DT466 that:

“If DT466 isn’t Enduring than we don’t what is”.

With a displacement of 466 cubic inches, DT466 is Six-Cylinder, four cycle Diesel Engine. Bore size and stroke of DT466 are 11.6.5mm*118.9mm (4.59*4.68 inches). With the compression ratio of 16.5:1. At 1900 rpm it produces maximum 260HP output while at 1400 rpm the maximum torque output is 800 ft-lbs.

DT466 engine aspiration system turbocharged with wastegate technology. Also with air to air intercooled design. This is Because of its fuel injection combustion technology. DT466 Engine governed speed 2500rpm estimated.

Navistar Introduced Wet Sleeve design into diesel Engines. In this model, they created cylinder walls/sleeves as the separately machined part which helps and fits exactly into the upper counter bore it helps in sealing at the top with O-ring housing bores are cast into the engine block in the bottom.

Major Update In International DT Engine Series

In 2004 major update was made into DT engine series to meet the emission standards set by the Environmental Protection Agency of USA. For this purpose, a new EVRT turbocharger technology did introduce with movable turbo vanes which helped in improved boosting and reduced the lag. Improved electronically controlled hydraulic unit fuel injection system along with a new four-valve cylinder head and an exhaust Gas Recirculation to reduce emissions.

Despite its endurance from a mechanic point of view Wet Sleeve engines do require in chassis overhauls after the specific period.

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Federal Mogul Holdings Corporation, better known as FDML, has come up with two piston skirt coatings: EcoTough –New Generation meant for gasoline run engines and EcoTough-D meant for diesel run engines. With the company innovating constantly, these new offerings come with improved formulation to reduce the friction and wear and tear in engines, helping it to tackle the varying temperatures and extreme conditions it has to operate in, especially for the downsized and turbo-charged engines.

Gian Maria Olivetti, the Chief Technology Officer of Federal Mogul Powertrain said that their main motive is to reduce the frictional losses by leveraging on their expertise on material. With their new range of EcoTough coatings, the durability of pistons are set to improve, thereby increasing the life of piston even in conditions where there is a high thermal and mechanical load in the present day engines that are efficient.

The solutions for gasoline and diesel engines differ greatly, mainly due to the relative difference in their combustion loads, geometry of piston and the lubricity of the fuels. They have worked on these differences and come up with specific coatings for each type of engine. The new generation of EcoTough coatings comprise of metal oxide-reinforced resin along with solid lubricant particles that are embedded. This coating is applied for a thickness of 15 microns and the wear and tear comes down by a whopping 40% over other coatings, improving the reliability of the piston even in extreme conditions. It also reduces the friction in piston by over 15% when compared to the standard coatings available in the market, which results in an improved efficiency of the engine.

The EcoTough range of coatings, which were developed after extensive rig testing, are now undergoing validation checks by automobile manufacturers before they will be used commercially.  EcoTough coatings are compatible both with aluminum and steel diesel pistons for commercial and passenger vehicles. Federal Mogul leveraged on the fact that diesel has better lubricity and the structural stiffness of diesel pistons are more, which enabled them to formulate the coatings accordingly. They also reinforced a polymer based coating with short length carbon fibers which comprised of embedded graphite that constituted to be a solid lubricant in EcoTough-D. This brought the friction in piston down by 35% when compared to conventional coatings. The water resistance of the coating saw a 30% improvement.

Almost 17% of the frictional losses in the engine arise only due to the piston skirt and piston pin, as per Dr. Frank T.H. Dornenburg, who leads the Technology department for Pistons at FDML. In a bid to reduce the friction and wear of piston skirt and cylinder surfaces, skirt coatings have proved to be effective and have also helped in achieving the interrelated targets. The application of coatings can be done using an automated and large scale production process, which will result in lower costs.

An Overview of Federal Mogul

Federal Mogul is an established company worldwide and supplies products and services to different automobile manufacturers and servicers from all over the world of all light, medium, heavy-duty and commercial, marine, rails, aerospace, power generation and industrial sector of markets. With the constant innovation at Federal Mogul, automobiles have been able to achieve better fuel economy, lower emission levels and better safety levels.

There are two independent lines of businesses at FDML run by two different CEOs, who directly report to the Board of Directors.

FDML manufactures components suited for automotive, heavy-duty, and industrial and transport applications. There are over 20 recognized brands in the global automobile aftermarket that are sold by Federal Mogul which include braking, wipers and different chassis components.

It was started in 1899 in Detroit and is headquartered in Southfield, Michigan. There are over 53,000 employees worldwide on its payroll.