The preliminary results include (1) establishment of a validated, high fidelity baseline analytical vehicle model, (2) modelling and simulation of the electrified engine cooling fan and mild hybrid power train system, and (3) experimental investigation of the influence of hydrogen injection on the fuel economy. This paper reports the strategic plan and preliminary results of the work. A strategic plan was developed that layouts the integrated technologies in the near-term, mid-term, and long-term time frame for fuel economy improvement of the truck. The focus of this work is the feasibility analysis and evaluation of current and future technology offerings from original equipment manufacturers and aftermarket suppliers that improve the fuel economy of the LMTV M1078 A1 2.5-ton cargo trucks. Turbocharged, air-to-air after cooler, EPA 07 certified.Īllison 3700SP, fully automatic/select 7 speed, electronically controlled, full-time all-wheel drive. Maximum speed (governed, at gross weight)Ĭaterpillar C7 ATAAC (air-to-air after cooler) HD diesel, in-line 6-cylinder, 4-stroke-cycle. Vehicle curb weight (no kits, crew, fuel) Commonality of chassis and power train components between the vehicles in the LMTV allow improvements to the target vehicle to have the potential to benefit the entire fleet. The vehicle specifications are listed in Table 1.
Basically, the LMTVs perform unit mobility and supply missions including the transport of equipment and personnel. The most common version of the FMTV is the Light Medium Tactical Vehicle (LMTV), a high mobility, 2.5-ton class, payload, 4 × 4 diesel-powered truck as shown in Figure 1.
The Family of Medium Tactical Vehicles (FMTV) has 14 variations of 2.5-ton and 5-ton truck, and continues to be the highest percent availability of any vehicle in the U.S.
It is critical to improve the fuel economy of those vehicles that play an important role in the U.S. The impact of the vehicle fuel economy in military applications is amplified due to the fact that much of the present logistics support is devoted to moving fuel. Over half of the fuel transported to the battlefield is consumed by support vehicles, not vehicles engaged in frontline combat. Army are combat vehicles and the other eight carry fuel and supplies. Not to mention only two out of the top ten battlefield fuel consumers in the U.S. The DoD estimates that 40000 Army personnel involved in either the distribution or movement of energy. The fuel represents more than half of the logistics tonnage of the Department of Defense (DoD), and more than 70% of the tonnage required to put the U.S. The cost to supply each vehicle with fuel during peace time is staggering and becomes more so under war zone conditions. Government owns and maintains a large fleet of ground vehicles covering a wide spectrum of mission profiles.
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