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Forklift Throttle Body
Forklift Throttle Body - Where fuel injected engines are concerned, the throttle body is the component of the air intake system which controls the amount of air which flows into the engine. This particular mechanism functions in response to operator accelerator pedal input in the main. Usually, the throttle body is positioned between the intake manifold and the air filter box. It is normally attached to or located near the mass airflow sensor. The biggest part within the throttle body is a butterfly valve known as the throttle plate. The throttle plate's main task is to be able to regulate air flow.
On nearly all automobiles, the accelerator pedal motion is transferred through the throttle cable, hence activating the throttle linkages works so as to move the throttle plate. In cars with electronic throttle control, also called "drive-by-wire" an electric motor regulates the throttle linkages. The accelerator pedal connects to a sensor and not to the throttle body. This sensor sends the pedal position to the ECU or Engine Control Unit. The ECU is responsible for determining the throttle opening based on accelerator pedal position along with inputs from other engine sensors. The throttle body has a throttle position sensor. The throttle cable connects to the black part on the left hand side that is curved in design. The copper coil situated near this is what returns the throttle body to its idle position after the pedal is released.
Throttle plates revolve within the throttle body each time pressure is placed on the accelerator. The throttle passage is then opened to allow much more air to flow into the intake manifold. Normally, an airflow sensor measures this alteration and communicates with the ECU. In response, the Engine Control Unit then increases the amount of fluid being sent to the fuel injectors in order to generate the desired air-fuel ratio. Frequently a throttle position sensor or TPS is attached to the shaft of the throttle plate in order to provide the ECU with information on whether the throttle is in the wide-open throttle or also called "WOT" position, the idle position or anywhere in between these two extremes.
In order to control the least amount of air flow while idling, some throttle bodies could have adjustments and valves. Even in units that are not "drive-by-wire" there will often be a small electric motor driven valve, the Idle Air Control Valve or likewise called IACV that the ECU utilizes so as to control the amount of air that could bypass the main throttle opening.
In various vehicles it is common for them to contain one throttle body. To be able to improve throttle response, more than one could be used and connected together by linkages. High performance cars such as the BMW M1, along with high performance motorcycles like the Suzuki Hayabusa have a separate throttle body for each and every cylinder. These models are called ITBs or also known as "individual throttle bodies."
The carburator and the throttle body in a non-injected engine are somewhat the same. The carburator combines the functionality of both the fuel injectors and the throttle body together. They can regulate the amount of air flow and mix the fuel and air together. Automobiles that include throttle body injection, which is called TBI by GM and CFI by Ford, put the fuel injectors within the throttle body. This allows an old engine the opportunity to be transformed from carburetor to fuel injection without considerably changing the design of the engine.
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