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Forklift Throttle Body
Forklift Throttle Body - The throttle body is part of the intake control system in fuel injected engines so as to regulate the amount of air flow to the engine. This mechanism operates by applying pressure upon the driver accelerator pedal input. Generally, the throttle body is placed between the air filter box and the intake manifold. It is normally fixed to or located near the mass airflow sensor. The largest part within the throttle body is a butterfly valve called the throttle plate. The throttle plate's main function is so as to control air flow.
On several styles of vehicles, the accelerator pedal motion is communicated through the throttle cable. This activates the throttle linkages that in turn move the throttle plate. In cars consisting of electronic throttle control, likewise 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 particular sensor sends the pedal position to the ECU or likewise known as Engine Control Unit. The ECU is responsible for determining the throttle opening based on accelerator pedal position along with inputs from different engine sensors. The throttle body consists of a throttle position sensor. The throttle cable is attached to the black portion on the left hand side that is curved in design. The copper coil placed next to this is what returns the throttle body to its idle position as soon as the pedal is released.
The throttle plate turns in the throttle body every time the operator presses on the accelerator pedal. This opens the throttle passage and enables much more air to flow into the intake manifold. Typically, an airflow sensor measures this change 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 likewise called TPS is fixed to the shaft of the throttle plate to provide the ECU with information on whether the throttle is in the idle position, the wide-open position or "WOT" position or anywhere in between these two extremes.
To be able to regulate the least amount of air flow while idling, several throttle bodies may have valves and adjustments. Even in units that are not "drive-by-wire" there would normally be a small electric motor driven valve, the Idle Air Control Valve or IACV which the ECU uses to control the amount of air that could bypass the main throttle opening.
In several vehicles it is common for them to contain a single throttle body. So as to improve throttle response, more than one can be utilized and attached together by linkages. High performance automobiles like the BMW M1, together with high performance motorcycles like for example the Suzuki Hayabusa have a separate throttle body for every cylinder. These models are referred to as ITBs or otherwise known as "individual throttle bodies."
A throttle body is like the carburetor in a non-injected engine. Carburetors combine the functionality of the fuel injectors and the throttle body into one. They operate by mixing the air and fuel together and by modulating the amount of air flow. Automobiles which have throttle body injection, that is called CFI by Ford and TBI by GM, put the fuel injectors within the throttle body. This permits an old engine the opportunity to be converted from carburetor to fuel injection without significantly altering the design of the engine.
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