In a turbocharged engine, the wastegate valve controls the amount of exhaust gas that flows into the turbine wheel. The wastegate helps to regulate the speed of the turbine by pushing these gasses away from the turbocharger, which in turn boosts the pressure in the system. It also keeps the engine from being exposed to too much pressure.
Methods for Wastegate Control
There are several types of wastegate controls available for your turbocharged engine. A wastegate can be controlled manually or with the use of a computer. Let’s look at a few examples.
- Manual – This type of control contains a mechanical link so that the operator can manually control the position of the wastegate valve.
- Pneumatic – Air is the catalyst for opening and closing the valve in a closed-loop system.
- Hydraulic – Engine oil is the liquid used in hydraulic wastegate controls. A spring opens the wastegate, and the pressure from the oil regulates the closure of the wastegate.
- Electric -Wastegates that were operated electrically were used in the mid-1900s, but have been replaced with more sophisticated and efficient methods.
Types of Wastegates
External and internal wastegates offer different types of pressure control, depending on the type of turbocharger you use.
- External wastegates – For high-powered engines, the specialized turbochargers use very high pressure. The external wastegate is a separate mechanism that is fitted to the exhaust manifold. It contains large outlets and intakes, as well as high tensions sprints, to control the intense gas pressures.
- Internal Wastegates – Most turbochargers come with an internal wastegate fitted inside the unit. The valve, which is built into the housing, has a spring-loaded actuator that controls the pressure. Internal wastegates are designed for standard levels of pressure and won’t be successful at very high speeds.
Make sure you find the right wastegate control for your turbocharged engine to keep it running smoothly.