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In 1998, light trucks accounted for over 48% of new vehicle sales in the U.S. and well over half the new Light Duty vehicle fuel consumption. The Light Truck Clean Diesel (LTCD) program seeks to introduce large numbers of advanced technology diesel engines in light-duty trucks that would improve their fuel economy (mpg) by at least 50% and reduce our nation's dependence on foreign oil. Incorporating diesel engines in this application represents a high-risk technical and economic challenge.

The J I Case Company recently introduced a new series of Maxxum tractors (Figure 1). The product line now offers 60, 67, 75, and 84 PTO kW versions. The all new 84 kW version features a new fuel delivery system providing both greater power and reduced exhaust emissions. The powertrain also features increased capacity components required for the reliability of the increased power, 84 kW model. The new series incorporates numerous customer requested improvements of the 5100 Series, including increased comfort, convenience, and visibility features such as swivel seat, in-cab remote coupler flow controls, fender mounted hitch controls and all glass doors.

The 700 Series John Deere Engine was created to accomplish two basic objectives-increase Deere engine power available from the present 215 kW to a new maximum of 340 kW, and provide heavy duty engines for use in new larger Deere vehicles. An extensive program has developed an engine that meets stringent requirements for durability, performance, noise, and compact package size. The 700 Series V-8 engine has a 140 mm bore, 127 mm stroke and 15.6 liter displacement. The engine has special design features which include unique solutions for the inherent difficulties of its “V” configuration. This paper will emphasize the technical solutions to problems encountered and illustrate practical application of analytical skills available to a Deere engine designer. Sections on selected major engine parts will be included to project an image of the engine and to Illustrate design features and specific solutions.