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Another modification to reduce parasitic loss, usually seen in track-only cars, is the replacement of an engine-driven water pump for an electrical water pump. [64] The reduction in parasitic loss from these changes may be due to reduced friction or many other variables that cause the design to be more efficient. [citation needed]
Engines with higher efficiency have more energy leave as mechanical motion and less as waste heat. Some waste heat is essential: it guides heat through the engine, much as a water wheel works only if there is some exit velocity (energy) in the waste water to carry it away and make room for more water. Thus all heat engines need cooling to operate.
A water-fuelled car is not any of the following: Water injection, which is a method for cooling the combustion chambers of engines by adding water to the incoming fuel-air mixture, allowing for greater compression ratios and reduced engine knocking (detonation). The hydrogen car, although it often incorporates some of the same elements.
A post shared on Facebook claims Tesla CEO Elon Musk announced the creation of a water-powered car engine. Verdict: False There is no evidence Musk has announced such a creation. Fact Check: Tesla ...
Most car engines have four to eight cylinders, with some high-performance cars having ten, 12 — or even 16, and some very small cars and trucks having two or three. In previous years, some quite large cars such as the DKW and Saab 92, had two-cylinder or two-stroke engines.
When the engine runs, it heats the water. Cooling is accomplished by the water steaming off and removing heat from the engine. When an engine runs under load for a period of time, it is common for the water in the reservoir to boil. Replacement of lost water is needed from time to time. A danger of the water-cooled design is freezing in cold ...
If plain water is left to freeze in the block of an engine the water can expand as it freezes. This effect can cause severe internal engine damage due to the expanding of the ice. Development in high-performance aircraft engines required improved coolants with higher boiling points, leading to the adoption of glycol or water-glycol mixtures.
The engine was made with a chamber volume V k of 2,500 in 3 (41 dm 3), and a power output of 550 hp (410 kW) per rotor. Both single, and twin-rotor engines were made (producing 550 hp (410 kW) or 1,100 hp (820 kW) respectively). The engines ran on natural gas and had a relatively low engine speed due to its application. [197]