Armor & Mobility

MAR-APR 2018

Military magazines in the United States and Canada, covering Armor and Mobility, focuses on tactical vehicles, C4ISR, Special Operations Forces, latest soldier equipment, shelters, and key DoD programs

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Page 28 of 35

Addressing Future Adaptability The ACE engine was designed specifically to be scalable and modular, enabling various ACE engine displacements and incremental horsepower/ torque ratings to optimally match the power requirements of a combat vehicle. Coupling the ACE engine with the Advanced Combat Transmission (ACT), being developed by SAPA Transmissions that offers 32 speeds, will ultimately produce highly efficient power, dense powertrain solutions tailorable to meet any combat vehicle configuration (front/rear drive) and weight class (40-80 ton), while ensuring better conformation to individual Army/Joint vehicle platform requirements. Lastly, the engine utilizes standard interface protocols (SAE mounts, electrical, and fluid couplings) to enable smooth integration with mating system components. The ACE engine design will continue to focus on improvements in efficiency and reduction in heat rejection. The program will investigate thermal barrier coatings to the pistons and exhaust port liner to reduce engine heat rejection while improving coating reliability that ultimately will reduce the thermal burden on the vehicle cooling system while providing more power to sprocket. Other possible avenues for exploration include high-temperature tribology materials and coatings for use on critical wear components (pistons, liners, and wrist pins) which may minimize frictional/heat losses and improve fuel economy. The ACE engine currently specifies use of a high viscosity 15W-40 oil (MIL-PRF-2104) while operating at high temperatures in order to prevent cylinder scuffing and other lubrication issues. Cummins will investigate critical engine tolerances to determine the impact of Single Common Powertrain Lubricant (SPCL) for reducing engine friction and develop a plan for eventual transition to this low viscosity oil during the next design phase. The Advanced Combat Transmission drastically improves the efficiency for combat vehicles while offering maximum optimization of the engine to increase the power density of the powertrain by increasing power at the sprocket to greatly enhance combat vehicle mobility. (TARDEC) For more information, go to Novi Suburban Collection Showplace 46100 Grand River Avenue, Novi, MI 48374 Main Session . . . . . . . . . . . . . . . . . . . . . . August 7, 2018 Advanced Planning Briefing For Industry . . . . August 8, 2018 Technical Sessions . . . . . . . . . . . . . . . . . . August 9, 2018 10th ANNUAL ㈀ ㄀㠀 一䄀嘀夀 䨀伀䤀一 䐀䔀䘀䔀一匀䔀 䌀伀一吀刀䄀䌀吀伀刀匀  一䄀吀䤀伀一圀䤀䐀䔀 䄀一䐀  䄀吀吀䔀一䐀 伀一䔀 伀䘀 吀䠀䔀  吀伀倀 䴀䤀䰀䤀吀䄀刀夀 䌀伀一吀刀䄀䌀吀䤀一䜀 䔀嘀䔀一吀匀 伀䘀 ㈀ ㄀㠀⸀ 刀䔀䜀䤀匀吀䔀刀 吀伀䐀䄀夀 䄀吀  圀圀圀⸀唀匀䐀䰀䘀⸀伀刀䜀 ENGINE UPGRADE ADVANCED GROUND PROPULSION March/April 2018 | Armor & Mobility | 27

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