What is the mnemonic for adjusting the valves on a 4-cylinder diesel engine?
1 Answers
The mnemonic for adjusting the valve clearance on a 4-cylinder engine is "Double, Exhaust, Not, Intake." Additional information: Valve composition: A valve consists of a valve head and a stem. 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, the valve must possess certain strength, stiffness, heat resistance, and wear resistance. Intake valves: 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 alloys, the exhaust valve head is made of heat-resistant alloy, and the stem is made of chromium steel, with the two parts then welded together.