The turbocharger that supercharges the engine is a diesel engine for automobiles due to the tightening of exhaust gas regulations. It is an indispensable product for. Especially in Europe, where the proportion of diesel passenger cars is high, the turbine side.
The turbocharger is available on prosourcediesel.com, which has a variable Zulvane and can control the boost pressure, is the mainstream. Is becoming. Turbocharger performance directly affects engine fuel economy, and the variable nozzle mechanism is in a high-temperature, non-lubricated environment. Since it is used underneath, we have developed and commercialized a turbocharger that has both high performance and high reliability.
Turbocharger structure:
The turbocharger is a part that draws more power than the engine displacement, but what exactly is the mechanism?
First of all, regarding the engine of a car, the engine operates in four stages.
“Inhalation” Inhales air and gasoline (air-fuel mixture),
“Compression” Compresses the inhaled air and
Ignite and explode with a “burning” spark plug
“Exhaust” Exhaust combustion gas and return to 1.
Normally, the exhaust gas is naturally discharged to the outside, but vehicles equipped with a turbocharger use that exhaust gas. Exhaust gas is applied to a blade-shaped part called a “turbine” to rotate the turbine. Then, the blades on the opposite side (intake side) connected by the shaft also rotate to suck in air. The sucked air is compressed and sent to the engine. It is a mechanism that produces more power than the normal displacement because it can burn a lot by sending a lot of air.
Intercooler indispensable for turbocharger:
And there is a cooling device called “intercooler” as a part that works together with the turbocharger. Since the compressed air becomes hot, if it is left as it is, it will have a bad effect on other parts. It also has the property that “high temperature air increases in volume”. However, the amount of oxygen does not change. In other words, even with the same amount of air, a lower temperature can carry more oxygen. Therefore, an intercooler, which is a cooling device, is indispensable for turbochargers. If cooling is not done properly, it may cause knocking due to lack of oxygen, reduce engine output, and worsen fuel efficiency.
Downsizing concept
It is still the same in the sense of “increasing power” for the purpose of using a turbocharger, but it is not a conventional “tool for running faster”, but it is designed so that the engine can be miniaturized and the turbo can work even at low speeds. Therefore, the design concept that uses a turbocharger as a “tool to bring out the same performance as a conventional engine even with a small displacement” is called the “downsizing concept”.
Hybrid vehicles have become widespread in Japan when it comes to fuel efficiency, but the “downsizing concept” is already the mainstream worldwide, and it is said that the “downsizing concept” will become widespread in Japan as well.
What is a supercharger?
As explained above, the turbocharger is a component called a supercharger that uses exhaust gas. Superchargers are roughly divided into two types. “Exhaust type turbocharger” and “mechanical supercharger”. In contrast to turbochargers that move using exhaust gas, superchargers are called “mechanical turbochargers” because they use the “power of the engine” to move.
Cause of damage to the turbocharger body.
Of course, if the turbocharger body is damaged, it will need to be replaced, but simply replacing it may cause damage with the same symptoms immediately. It is important to identify the cause and take appropriate measures.
Supply oil malfunction.
Sludge is generated due to lack of oil, deterioration of oil over time, etc., which may cause seizure. Change the engine oil frequently.
Foreign object diving.
Foreign matter can jump into the intake / exhaust side, damaging the impeller and wheel blades. If the blades rotate while they are damaged, the turbine shaft will become unbalanced, causing shaft breakage and bearing seizure. Also, if the missing turbine blades get inside the engine, there is a risk of engine blow, so it is recommended to replace it as soon as possible.
Exhaust temperature exceeded.
If the engine is turned off immediately after the turbine is rotated at high speed, the supply of engine oil will also stop, and the shaft will easily run out of oil film. It can also cause sludge, which can also cause burn-in. After applying a load to the engine or turbocharger, let’s cool down (idle) firmly before turning off the engine. As a guide, it is said that one or two minutes is enough.
How long does the turbocharger last?
Then, how long should the life of the turbocharger be considered to be a replacement? Unfortunately, the life of a turbocharger varies greatly depending on how you ride it. Of course, if you are driving with the accelerator depressed a lot, the load will be high and the life will be shortened. Some people have been riding turbo cars for more than 20 years and have never broken, while others have repeated turbine blows multiple times in a short period of time. The turbine part is used in extremely harsh conditions where it receives exhaust gas at a high temperature of 800 to 900 degrees Celsius and rotates at a high speed of 200,000 rpm. Change the engine oil frequently to prevent the oil film from running out and the engine oil from deteriorating, and keep in mind after-idling after use under high load.
