A turbo actuator, or wastegate, uses a pressure actuator, which is controlled by boost pressure as to whether it's open or closed, to control boost pressure and power output. When boost pressure builds force, it is applied to the pressure actuator, and when the pressure exceeds the spring value, the actuator opens, allowing exhaust gases to escape, which maintains boost pressure at a set level.Continue Reading
Diversion of the exhaust gases is what controls the speed of the turbine that regulates the rotating speed of the compressor. A wastegate's primary function is to control boost pressure to protect the engine and turbocharger from damage.
There are two types of wastegates: internal and external. Most cars that come stock with a turbocharged engine use an internal wastegate. Internal wastegates are set to handle stock power, and are usually swapped out for external wastegates to accommodate a bigger turbocharger or better control of boost and power output.
An external wastegate requires a specially made exhaust with a dedicated runner going to the wastegate or may be part of the exhaust housing. External wastegates are more precise in high-power situations when high boost is achieved. External wastegates mostly use a poppet-type valve found in cylinder heads and are operated pneumatically. In rare cases, a butterfly valve is also used in external wastegates.Learn more about Motion & Mechanics
Motion sensor wiring diagrams typically includes the sensor, a hot wire, a neutral wire and an output device, such as a light or fan. The sensor sits between the hot wire and the wire to the output device, taking the place of a conventional light switch.Full Answer >
The formula for mechanical efficiency is 100(Wo/Wi), where Wo is the work output and Wi is the work input. Work is a product of force and distance, so the two are interrelated. Because of the laws of thermodynamics, some energy is always lost to heat, sound or another factor.Full Answer >
An output arm is the end of a lever that moves the load up when force is applied to the other end of the lever. The upward force that moves the output arm is the output force.Full Answer >
Total dynamic head is the total pressure when fluid is moving through a system which includes the pressure needed to overcome elevation differences and the pressure needed to overcome friction losses in order to produce a required pressure output. This measurement is usually expressed in either feet or meters, and refers to the equivalent height of the column of fluid in a manometer.Full Answer >