Does 'e' Stand for Exhaust Valve or Intake Valve?
1 Answers
The full name of 'e' is exit, which means exhaust, while 'i' represents intake, being the abbreviation of 'in'. More details about valves are as follows: 1. The function of a valve is specifically responsible for introducing air into the engine and expelling the exhaust gases after combustion. In terms of engine structure, valves are divided into intake valves (intake-valve) and exhaust valves (exhaust-valve). The intake valve's role is to draw air into the engine to mix with fuel for combustion; the exhaust valve's role is to expel the burned exhaust gases and dissipate heat. 2. The valve head operates at very high temperatures (intake valve 570~670K, exhaust valve 1050~1200K) and also withstands gas pressure, the force of the valve spring, and the inertial force of the transmission components. With poor lubrication and cooling conditions, valves must possess certain strength, stiffness, heat resistance, and wear resistance. Intake valves are generally made of alloy steel (chromium steel, nickel-chromium steel), while exhaust valves are made of heat-resistant alloys (silicon-chromium steel). Sometimes, to save on heat-resistant alloy materials, the head of the exhaust valve is made of heat-resistant alloy, and the stem is made of chromium steel, after which the two parts are welded together.
