4. In fact, the oil tank cover is one-way valve.
Many people would tighten the oil tank cap after filling it with oil because they were worried that an insufficient seal would let oil leak. In actuality, you might not be aware that the gas cap does not completely cover the fuel outlet. It performs the role of a one-way valve, keeping the fuel and fuel steam inside the tank from escaping while allowing fresh air from outside to enter through the cap.
Why is it designed in this manner? In fact, the principle is very simple: the car will continue to consume oil while driving, the oil tank is completely sealed, and with less and less oil, the oil tank will gradually form a vacuum, which will not only affect the oil pump’s suction, but may also result in the oil tank being sucked flat. As a result, the oil tank cover should be designed in the form of a one-way valve. When a part of the oil is consumed, resulting in a certain level of negative pressure in the oil tank, the valve on the oil tank cover is sucked open, allowing outside air to be added to prevent the oil tank from becoming too vacuumed.
So don’t be alarmed if you hear a faint suction sound when unscrewing the cap to fill the gas tank. It’s completely normal. However, if the suction sound is particularly loud, we should pay closer attention. It could be a problem with the solenoid valve on the carbon tank or the oil tank cap.
5. The maximum torque speed may not definately produce maximum torque
Recently, Jack bought an automobile. And after looking over the specifications, he learned that the engine produces its maximum torque at 5000 RPM. In order to feel it while driving on the road, Jack then stepped up the speed of 5000 RPM out of enthusiasm. However, Jack didn’t understand why the anticipated feeling of pushing back did not occur when the speed reached 5000 RPM.
Why isn’t there a difference in power even though Jack has the engine set to maximum torque? The simple explanation is that Jack did not completely depress the brakes. Because the engine parameters measure maximum torque when the pedal is fully depressed, you must fully depress the accelerator pedal to experience the engine’s maximum torque while driving.
6. Is the piston responsible for pushing the engine’s exhaust out?
We all discovered the basics of how engines work in physics class in junior high. We’ve learned that the exhaust stroke piston pushes the burned exhaust gas out of the exhaust pipe, while the intake stroke piston pulls air and fuel into the cylinder.
In reality, however, some of the exhaust gas isn’t actually pushed by the piston but rather from the cylinder itself. Because as it operates, the mixture gas burns and expands, pushing the piston downward. The mixture gas in the cylinder at the bottom of the piston, which is BDC, is still under some pressure. Once the exhaust stroke begins, the piston begins to rise and the exhaust valve opens. Immediately after this, a portion of the high-temperature, high-pressure exhaust gas will spontaneously rush out of the exhaust valve, the pressure in the cylinder will swiftly drop, and the piston will then rise to push the remaining exhaust gas out of the cylinder.
That happens because the exhaust valve is open when a portion of the exhaust gas is automatically released under pressure’s drive, causing an extremely loud sound of engine exhaust, especially some cars whose exhaust pipe has been destroyed. Today’s engines typically use the design of a small cylinder diameter and large stroke because the piston moves down a longer distance in this way,allowing the energy of mixture expansion to be fully utilized, thus improving thermal efficiency. Some engines were designed with large cylinder diameters and short stroke to maximize power. As a result, these engines accelerate faster, generate more power, and produce better exhaust sounds, but they also consume more fuel and have lower thermal efficiency.
Have you picked up anything new from this page? Numerous systems and functions in a car are constantly improved for long-term use. The public’s needs and various regulatory requirements are driving the advancement of automobile technology, and the future will undoubtedly bring us more novel and unusual technologies.