Cummins Shows V-8 Diesel for Light, Midrange Trucks

By Tom Berg | October 4, 2013

It’s about a year away, but Cummins Inc. has begun touting a new automotive-type diesel, the ISV5.0, a 5-liter (302-cubic-inch) V-8 that it’s marketing to manufacturers of light- and medium-duty on-road vehicles.

The relatively high-speed engine promises high performance in a compact package with low total cost of ownership, executives said Thursday at an introduction in their company’s home town of Columbus, Ind.

The modest-size engine is aimed at pickup-and-delivery vehicles, other light- and medium-duty trucks, school buses and motorhomes. Cummins is talking with original-equipment manufacturers about using it.

The first announced application is planned by Nissan North America for its redesigned 2015 Titan pickup, due out in the fall of ’14. The Turbo Diesel, as Nissan will call it, might later go in its NV series of full-size cargo and passenger vans.

The ISV5.0 will come in four ratings: 200 and 220 horsepower with 520 lb-ft of torque, and 250 and 275 horsepower with 560 lb-ft. Rated speed is 3,200 rpm. Nissan’s ratings are different and have not been announced.

“Cummins’ ISV5.0 creates new opportunities for our OEM customers as a compact and lightweight engine that delivers best-in-class fuel efficiency and total cost of ownership,” said Dave Crompton, vice president and general manager at Cummins Engine Business.

“Many of our customers have asked for a Cummins alternative for gasoline or other small displacement automotive diesel engines. The ISV5.0 represents the next dimension in fuel economy and performance as Cummins continues to broaden our on-highway product line.”

The ISV5.0 is designed to fit where a comparable V-8 or V-10 gasoline engine is now used, he said. Multiple front-end accessory drive options handle the common automotive accessories required by a variety of applications, including the alternator, air compressor, A/C compressor and hydraulic pump.

These options, coupled with Cummins’ integration expertise, minimize OEM engineering time and vehicle retooling costs, Crompton said. The engine will be supported through Cummins’ dealer network.

Features include a compacted graphite iron cylinder block, forged steel crankshaft, high-strength aluminum alloy heads, composite valve covers and dual overhead camshafts are designed for maximum durability in a lightweight package. Noise, vibration and harshness (NVH) are said to be low to enhance driver comfort.

A Bosch high-pressure common-rail fuel (HPCR) system and multiple-firing piezo fuel injectors will provide precise fuel control for efficient in-cylinder combustion, leading to better fuel efficiency and reduced emissions.

Integrated electronic controls manage the fuel and air system, whose heart is a Cummins variable geometry turbocharger. A diesel particulate filter and urea injection equipment will help control particulate and nitrogen oxide emissions in the exhaust.

Other features include:

  • Advanced ceramic glow plugs for easy starting in cold weather, and the plugs are designed to last the life of the engine, with no maintenance;
  • A two-stage fuel filter system using the latest NanoNet media from Cummins Filtration, which provides low fuel-flow restriction and traps greater than 99% of all particles as small as 4 microns;
  • A high-efficiency coalescing crankcase filter to eliminate hydrocarbon emissions and oil mist.

Cummins will market the ISV5.0 in the United States and Canada, and it will be certified to the near-zero NOx and particulate emissions levels required by the U.S. Environmental Protection Agency, the company said. At launch, it will also meet greenhouse gas requirements through 2016, and 2015 California Air Resources Board standards, including on-board diagnostics.

The ISV5.0 and the Nissan Turbo Diesel will be manufactured at the Columbus Engine Plant. Production of the ISV5.0 will start during the fourth quarter of 2014.