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2026. 6. 30. 작업
We have fuel injection, why not air injection?
Simple reason: volume. @ 14.7:1 stoich, your input into the cylinder would need to be 14.7x bigger (or push that much more) through a nozzle than you would the fluid which is fuel. You state it would have fewer mechanical parts, but is that true? You'd have to furnish a mechanical method to create the high pressure air as well as introduce it into the system. You'd have to have some type of tank which would hold the high pressure air. Then that "high pressure" would need to be in the 3000-5000 psi range at a guess to ensure proper flow. Think of an air compressor which could keep up with the demand you are talking about. Let's say we throw some math in the mix (and assume I'm not just being completely stupid ... though the jury is out on that one): A 2L engine has a swept volume of 2L. If this theoretical engine was running, naturally aspirated and attained an 80% volumetric efficiency (VE), it would be taking in .8L of air every revolution of the crankshaft. The math: 2.0L X .8 = 1.6L
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2003 Hyundai Santa Fe will start then die. Then it will not start. After pumping the accelerator or holding on the floor and returning later it will start. Nothing codes out. This happens probably 15% of the time. Any ideas?
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A friend has an older Miata that was improperly stored for at least three years. Most of the time, it was not garaged. The gas is old, the battery is dead, it has not been started. It was probably parked without an oil change. He is looking to do the minimum to get this sellable, so the primary concern is the initial startup and the brakes. What would be recommended , especially regarding that first engine startup?
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I am planning to start using seafoam in my gas and oil ,how often should you a add it an how much.The label isn’t to clear about it.
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I’ve asked a few mechanics and DIYers this question and so far no consensus. Let’s say you’re 1000 miles away from next SCHEDULED oil change, and you’re about to leave on a 2000 mile road trip. Would you choose to change your oil 1000 miles early before the trip, or 1000 miles late after the trip?