What is the function of plunger in fuel injection pump?
A fuel injection pump plunger which enables the timing of the fuel injection to be controlled in accordance with the engine load, and can be used to prevent the emission of exhaust smoke and to achieve quieter engine operation, and under full-load conditions enables the engine to regain speed rapidly.
What is the difference between distributor type injection pump and inline plunger injection pump?
The inline type uses one plunger for one injector, but the distributor type uses a single plunger for all injectors. The way it works, this plunger will press all the fuel in each fuel barrel alternately. The fuel barrel is placed around the pump shaft.
What is the difference of inline injection pump and rotary injection pump?
An inline pump is a bit different from the rotary pump. Where the rotary pump has the output lines in a circle, and inline pump has them all in a straight line. Unlike other types of fuel pumps, each cylinder on an inline pump operates on its own, also allowing them to fail separately.
How does an inline injection pump work?
A camshaft cam follower and spring move the plunger in a reciprocating motion. When the plunger is below the ports fuel from the gallery enters the barrel above the plunger.
How does a diesel plunger pump work?
The pump camshaft is connected to the engine crankshaft, so that when the engine cranks automatically the pump camshaft rotates. This rotation will move the plunger, so that the plunger is pressed upwards and as a result the fuel that is already in the fuel barrel is pressed with high pressure and enters the injector.
What is fuel injection pump?
The fuel injection pump is the heart of the diesel engine. Precisely delivered fuel maintains a rhythm or timing that keeps the engine running smooth. Simultaneously, the pump also controls the amount of fuel needed to gain the desired power.
What are the two types of fuel injection pump?
The main types of injection systems include pump-line-nozzle, unit injector, and common rail. Modern injection systems reach very high injection pressures, and utilize sophisticated electronic control methods.
How does a mechanical injection pump work?
Mechanical fuel injection works with a simple throttle-controlled air valve and a fuel pump, usually running at one-half engine speed. After pulling fuel from a vented fuel tank, the fuel is delivered through a barrel valve that controls the amount of fuel with the position of the air valve.
How many types of fuel injection pumps are there?
The fuel injection types used in newer cars include four basic types: Single-point or throttle body injection. Port or multipoint fuel injection. Sequential fuel injection.
How does an inline diesel injector pump work?
Each element of the pump consists of a cam-driven plunger, delivery valve, and the governor assembly. The purpose of the governor is to control the volume of the fuel delivered by the plunger to a cylinder. It is attained by rotating the plunger with the helical groove with respect to the spill orifice.
What is a inline pump?
In-line pumps are centrifugal pumps, whose pump discharge and pump suction nozzles lie in a straight line of piping. It is often used in building services applications (e.g. heating and air conditioning) and is driven by means of a. Canned motor Fig. 1 In-line pump.
Is fuel pump Same as fuel injector?
A fuel injector atomizes the pressurized fuel. It also injects it into the combustion chamber. In comparison, fuel pumps pressurize fuel and send it through the fuel line and fuel injectors. Fuel injectors decrease the pressure within fuel systems, and fuel pumps increase the pressure within the fuel system.
What type of pressure draws fuel through the lines in a mechanical system?
Electric fuel pumps deliver gasoline under high pressure from the gas tank to the injectors, typically ranging between psi. Electric pumps are pusher pumps because they generate positive electrical pressure to push the fuel in fuel lines to the engine.
Does fuel injection require a fuel pump?
A high-pressure electric pump is required to generate pressure so fuel will spray out of the fuel injectors when the injectors open. The amount of pressure the pump has to generate will vary depending on the application, but is typically in the 35 to 80 PSI range.
How is the pressure controlled in the fuel injection system?
The pump maintains the rail pressure by continuously delivering fuel to the common rail. This pressure is monitored by a pressure sensor and the difference between the nominal rail pressure value and the measured one is the input signal for the controller.
How does a mechanical diesel injector work?
Pressure under the needle tapered shoulder drops and the spring force pushes the needle down on the seat. Cutting off the fuel supply to the engine.
How much fuel pressure does a fuel injector need?
Required fuel pressure can vary depending on your vehicle’s engine and fuel system. Carbureted engines may require as little as 28 kPa (4 PSI), while modern multipoint fuel injected high-performance engines can require as much as 414 kPa (60 PSI).