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The first person to build a working four-stroke engine, a stationary engine using a coal gas-air mixture for fuel (a gas engine), was German engineer Nicolaus Otto. [4] This is why the four-stroke principle today is commonly known as the Otto cycle and four-stroke engines using spark plugs often are called Otto engines.
In spark-ignition internal combustion engines, knocking (also knock, detonation, spark knock, pinging or pinking) occurs when combustion of some of the air/fuel mixture in the cylinder does not result from propagation of the flame front ignited by the spark plug, but when one or more pockets of air/fuel mixture explode outside the envelope of the normal combustion front.
On some OHV engines in the 1960s, such as the Ford Taunus V4 engine and Opel CIH engine, the tappet adjustment was done by setting the height of the rocker pivot point (rather than the typical method of a rocker-end adjustment screw). On the 1965-1970 versions of the Opel CIH engine with solid tappets, the tappet adjustment was conducted with ...
Compressed air can be supplied from another engine, a unit on the ground or by the aircraft's APU. Small internal combustion engines are often started by pull cords. Motorcycles of all sizes were traditionally kick-started, though all but the smallest are now electric-start.
The first engine to feature hydraulic lifters was the 1930 Cadillac V16 (Model 452). Hydraulic lifters were nearly universal on cars designed in the 1980s, but some newer cars have reverted to bucket-and-shim mechanical lifters.
This is the most important question anyone can ask at the start of a new year. One of the first things a retiree can do at the beginning of 2025 is to review their budget and ensure they are not ...
Donald Trump's lawyers are urging the New York judge in his criminal hush money case to throw out his conviction based on unsworn allegations of "grave juror misconduct" that prosecutors have ...
By Bo Erickson. WASHINGTON (Reuters) - A staffer for a U.S. House of Representatives Democrat was arrested at the Capitol on Monday when a regular security check turned up ammunition in his bag ...