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https://en.wikipedia.org/wiki/Fuel_pump
Decline of mechanical pumps
As engines moved away from carburetors and towards fuel injection, mechanical fuel pumps were replaced with electric fuel pumps, because fuel injection systems operate more efficiently at higher fuel pressures (40–60 psi) than mechanical diaphragm pumps can generate. Electric fuel pumps are generally located in the fuel tank, in order to use the fuel in the tank to cool the pump and to ensure a steady supply of fuel.
Another benefit of an in-tank mounted fuel pump is that a suction pump at the engine could suck in air through a (difficult to diagnose) faulty hose connection, while a leaking connection in a pressure line will show itself immediately. A potential hazard of a tank-mounted fuel pump is that all of the fuel lines are under (high) pressure, from the tank to the engine. Any leak will be easily detected, but is also hazardous. |
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Sydney建房 - 推倒重盖，新手记录 30/9/2022 (2021-4-15) cynthiabill 
也谈聊斋 (2014-2-17) daniello 
楼主:胖乐乐
发表于 2018-4-24 07:47
