turbochargers parts, turbochargers, garrett turbochargers, used turbochargers, garret turbochargers
| turbochargers, turbo, diesel injection , fuel injection, common rail, fuel pumps, nozzles, solenoids, actuators, valve actuators, rebuilt turbochargers, hoses, bosch appliances, bosch tools, delphi components, diesel fuel injection, denso, carter fuel pumps , delphi, fuel injection pumps, garrett turbo, garrett turbochargers, honeywell international, superchargers, turbo kit, turbochargers work, fuel additives , turbochargers parts, glow plugs, fuel filters, rubber hoses, fuel injectors, superchargers, bosch, delphi, garrett, mitsubishi, toyota, ihi, kkk, denso, honeywell, iveco, turbines, index, | |
|
Turbochargers are a type of forced induction system. They compress the air flowing into the engine (see How Car Engines Work for a description of airflow in a normal engine). The advantage of compressing the air is that it lets the engine squeeze more air into a cylinder, and more air means that more fuel can be added. Therefore, you get more power from each explosion in each cylinder. A turbocharged engine produces more power overall than the same engine without the charging. This can significantly improve the power-to-weight ratio for the engine (see How Horsepower Works for details). In order to achieve this boost, the turbocharger uses the exhaust flow from the engine to spin a turbine, which in turn spins an air pump. The turbine in the turbocharger spins at speeds of up to 150,000 rotations per minute (rpm) -- that's about 30 times faster than most car engines can go. And since it is hooked up to the exhaust, the temperatures in the turbine are also very high Optional Turbo Features The Wastegate Most automotive turbochargers have a wastegate, which allows the use of a smaller turbocharger to reduce lag while preventing it from spinning too quickly at high engine speeds. The wastegate is a valve that allows the exhaust to bypass the turbine blades. The wastegate senses the boost pressure. If the pressure gets too high, it could be an indicator that the turbine is spinning too quickly, so the wastegate bypasses some of the exhaust around the turbine blades, allowing the blades to slow down. Ball Bearings Some turbochargers use ball bearings instead of fluid bearings to support the turbine shaft. But these are not your regular ball bearings -- they are super-precise bearings made of advanced materials to handle the speeds and temperatures of the turbocharger. They allow the turbine shaft to spin with less friction than the fluid bearings used in most turbochargers. They also allow a slightly smaller, lighter shaft to be used. This helps the turbocharger accelerate more quickly, further reducing turbo lag. Ceramic Turbine Blades Ceramic turbine blades are lighter than the steel blades used in most turbochargers. Again, this allows the turbine to spin up to speed faster, which reduces turbo lag. Sequential Turbochargers Some engines use two turbochargers of different sizes. The smaller one spins up to speed very quickly, reducing lag, while the bigger one takes over at higher engine speeds to provide more boost. Intercoolers When air is compressed, it heats up; and when air heats up, it expands. So some of the pressure increase from a turbocharger is the result of heating the air before it goes into the engine. In order to increase the power of the engine, the goal is to get more air molecules into the cylinder, not necessarily more air pressure. Image courtesy Garrett How a turbocharger is plumbed (including the charge air cooler) An intercooler or charge air cooler is an additional component that looks something like a radiator, except air passes through the inside as well as the outside of the intercooler. The intake air passes through sealed passageways inside the cooler, while cooler air from outside is blown across fins by the engine cooling fan. The intercooler further increases the power of the engine by cooling the pressurized air coming out of the compressor before it goes into the engine. This means that if the turbocharger is operating at a boost of 7 psi, the intercooled system will put in 7 psi of cooler air, which is denser and contains more air molecules than warmer air. How Car Engines Work How Automobile Ignition Systems Work How Horsepower Works How Torque Converters Work How Champ Cars Work How NASCAR Race Cars Work How Car Cooling Systems Work How does nitrous oxide help an engine perform better? Turbo International: How Turbos Work - illustrated! Mercedes-Benz: VNT turbocharger with variable turbine geometry Ray Hall Turbocharging - Twin Turbo 351 Windsor Sport Compact Car Magazine: Turbo Basics Turbo Basics & Tips Garrett TurboChargers.com |
|