What is metering in diesel engine?
What is metering in diesel engine?
A fuel metering system for an internal combustion engine uses a digital computer to calculate the desired fuel flow to maintain an air/fuel ratio required under the engine operating conditions existing at the time.
What is fuel metering unit?
The fuel metering unit is disposed in a fuel flow between a prefeed pump and a high-pressure fuel pump of a fuel injection system for an internal combustion engine and serves to variably adjust the fuel quantity delivered by the high-pressure fuel pump.
What does a diesel metering valve do?
To adapt the fuel pressure in the rail, the fuel metering valve on the mechanical fuel pump controls the amount of fuel entering the pump. The plunger is held fully open by a spring to let fuel pass through.
What is the function of metering unit?
The metering device is responsible for feeding the proper amount of refrigerant to the evaporator coil. The refrigerant that enters the metering devices is a high temperature, high pressure, subcooled liquid that leaves the devices as a low-temperature, low-pressure saturated liquid.
How is fuel metering done in CI engine?
The engine load is regulated by varying the effective pump stroke and so the fuel mass injected per cycle. It is an extremely rigid system since fuel pressure and timing are directly controlled by the engine speed. A single plunger and barrel meter and distribute the fuel to all the injectors.
What is a fuel metering valve?
Fuel metering valves are the gas turbine’s throttle control. Industrial gas turbines generate power from the expansion of hot gases when fuel is burnt in the compressed air. The proportions of the fuel and air mixture decide how much power the gas turbine delivers.
What are metering valves?
A brake metering valve is used to Balance the Braking Forces. It is only found on vehicles with front disc and rear drum brakes. The metering valve holds back fluid to the front brakes until enough pressure is created to overcome the return springs inside the rear drums. It is also known as a “metering block.”
What are two types of metering devices?
There are several metering devices in a typical system, including the thermostatic expansion valve (TEV or TXV), automatic expansion valves, electronically-governed expansion valves, balanced port TEVs, superheat and multi-circuited TEVs, and evaporators.
