The camshaft has lobes which force valves open. This belt is connected to a cam gear which is connected to the camshaft(s). This also shows us how the crankshaft is connected to a timing belt or chain. Here is a gif to help visual the combustion cycle in action. Not shown above is how these are all connected. This forces the used mixture out of the exhaust valve and through the rest of the exhaust. The intake valve stays closed and the piston goes back up. When the piston reaches somewhere near the bottom the exhaust valve opens. This forces the piston downward which forces the crankshaft to continue turning (in in turn, turns whatever it is connected to – like your transmission which is connected to your wheels). When the piston reaches somewhere near the top, or top dead center (TDC), the spark plug ignites the compressed air fuel mix resulting in combustion. Next up is the power or combustion stroke. Compressionĭuring the compression stroke, both the intake and exhaust valves are closed (many engines have more than 2 but the point is all valves are closed or near closed during this stroke) and the crankshaft is moving upward compressing the air fuel mixture in the combustion chamber. This fuel injector will vary the amount of fuel introduced based on the amount of air being fed into the cylinder. Some cars have direct injected engines with the injector in the combustion chamber). Prior to the intake valve is a fuel injector (for port injected cars at least. The lowering of the piston (with the exhaust valve closed) creates a vacuum and sucks in the air through the intake valve. As it is lowering, the intake valve is simultaneously opening. The intake stroke is where the piston lowers inside the cylinder. Below is an illustration that covers each stroke and a brief overview of what’s happening along the way. The four strokes of an engine make up a full combustion cycle. Now, unless your daily driver is a riding lawn mower (no offense, Bobby Boucher), you’re likely working with a 4 stroke engine with at least 4 cylinders. Let’s have a basic overview on the operation of an internal combustion engine, ECU tuning, and the Accessport. Now that you’ve figured out what you want to do, how do you actually tune your engine? First, you’ll need a thorough understanding of the components that make up the engine and how they work together, how those components are controlled, and how to manage that control. For the sake of simplicity, and since it tends to be the most common goal, most of what is mentioned here will focus on tuning the engine with a performance goal in mind. You can then start down the proper path to reach them. The first step for how to tune a car would be to first identify those goals. The point is, tuning can accomplish a lot of different goals. Leaning the engine out to the ragged edge at peak boost for maximum power? Tuning. Retarding timing so you can safely run 87 octane on your turbo car? Tuning. Even with this more precise definition we still have a wide range of what tuning can be. Most would want to know how to tune a car to make changes to how your engine operates for some sort of benefit. According to the system and software, Google how to close it if you dont know how to handle.Tuning can mean a lot of different things in the world of cars. Close all anti-virus software and firewall on the computer (the system firewall should also be closed.Connect the device to the computer with a power cable and USB cable, and plug the smart lock dongle into computer,like what I show you here.4.2 Related Manuals / Resources Tuner-Box PCMTUNER Magic Car Tool Preparation before installation
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