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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 control the amount of air flow to the engine. This particular mechanism functions by placing pressure on the driver accelerator pedal input. Normally, the throttle body is placed between the air filter box and the intake manifold. It is usually attached to or placed close to the mass airflow sensor. The biggest part in the throttle body is a butterfly valve called the throttle plate. The throttle plate's main task is to regulate air flow.
On most automobiles, the accelerator pedal motion is transferred through the throttle cable, hence activating the throttle linkages works to move the throttle plate. In automobiles consisting of electronic throttle control, likewise called "drive-by-wire" an electric motor controls 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 also known as Engine Control Unit. The ECU is responsible for determining the throttle opening based upon 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 part on the left hand side which is curved in design. The copper coil located near this is what returns the throttle body to its idle position once the pedal is released.
The throttle plate turns inside the throttle body each time the operator presses on the accelerator pedal. This opens the throttle passage and allows a lot more air to be able 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 so as to generate the desired air-fuel ratio. Frequently a throttle position sensor or likewise called TPS is connected 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 likewise called "WOT" position or somewhere in between these two extremes.
Some throttle bodies can have valves and adjustments to be able to control the least amount of airflow throughout the idle period. Even in units which are not "drive-by-wire" there will often be a small electric motor driven valve, the Idle Air Control Valve or otherwise called IACV which the ECU utilizes in order to regulate the amount of air which could bypass the main throttle opening.
In many cars it is common for them to contain one throttle body. In order to improve throttle response, more than one could be used and connected together by linkages. High performance vehicles like the BMW M1, along with high performance motorcycles such as the Suzuki Hayabusa have a separate throttle body for each cylinder. These models are called ITBs or "individual throttle bodies."
A throttle body is like the carburetor in a non-injected engine. Carburetors combine the functionality of the throttle body and the fuel injectors into one. They function by combining the fuel and air together and by regulating the amount of air flow. Cars that have throttle body injection, which is called CFI by Ford and TBI by GM, situate the fuel injectors inside the throttle body. This permits an older engine the chance to be converted from carburetor to fuel injection without really altering the engine design.
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