Four Wheel Drive name in 1910. Besserdich and Zachow's patented full time four wheel drive system combined a lockable center differential with double-Y constant velocity universal joints for steering. In modern terms the Battleship would be considered All Wheel Drive as all FWD products featured full-time four wheel drive with a lockable center differential. The success of the four-wheel drive in early military tests prompted the company to switch from cars to trucks. In 1916 the U.S. Army ordered 147 Model B three ton trucks for the Pancho Villa Expedition. The U.S. Army ordered 15,000 FWD Model B three ton trucks as the
Two- and four-stroke engines Two- and four-stroke engines Two-and-four stroke engines are engines that combine elements from both two-stroke and four-stroke engines. They usually incorporate two pistons. The M4+2 engine , also known as the double piston internal combustion engine, is a new type of internal combustion engine invented by a Polish patent holder Piotr Mężyk. The M4+2 engine took its name from a combination of the two working modes of the known engines, that is from the Two-stroke engine and Four-stroke engine. The two-stroke combustion engine is characterized by a simple construction and system of air load change as well as bigger index