OHVは自動車に使われる？
In 1893, Rudolf Diesel built his first Diesel engine protoype. In winter 1893/1894, the cylinder head was modified, now featuring push rods and rocker arms that actuated poppet valves. The modified version was ready for testing on 18 January 1894. Diesel had published this design in 1893. In 1896, U.S. patent 563,140, awarded to William F. Davis, illustrated an internal combustion engine with valves in the head, showing his solution to the problem of how to cool the head, which problem had made the overhead valve engine difficult before then. Henry Ford's Quadricycle of 1896 had valves in the head, with push rods for exhaust valves only, the intake using suction valves. In 1898, Detroit bicycle manufacturer Walter Lorenzo Marr built a motor-trike with a one-cylinder OHV engine with push rods for both exhaust and intake. In 1900, David Buick hired Marr as chief engineer at the Buick Auto-Vim and Power Company in Detroit, where he worked until 1902. Marr's engine employed pushrod-actuated rocker arms, which in turn pushed valves parallel to the pistons. Marr left Buick briefly to start his own automobile company in 1902, the Marr Auto-Car, and made a handful of cars with overhead valve engines, before coming back to Buick in 1904. The OHV engine was patented in 1902 (awarded 1904) by Buick's second chief engineer Eugene Richard, at the Buick Manufacturing Company, precursor to the Buick Motor Company. The world's first production overhead valve internal combustion engine was put into the first production Buick automobile, the 1904 Model B, which used a 2-cylinder Flat twin engine, with 2 valves in each head. The engine was designed by Marr and David Buick.
made a handful of cars with overhead valve engines