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Throttle Body for Forklift
Forklift Throttle Body - The throttle body is part of the intake control system in fuel injected engines to regulate the amount of air flow to the engine. This particular mechanism works by placing pressure upon the operator accelerator pedal input. Normally, the throttle body is placed between the air filter box and the intake manifold. It is often connected to or placed near the mass airflow sensor. The biggest component within the throttle body is a butterfly valve known as the throttle plate. The throttle plate's main task is to be able to control air flow.
On many kinds of vehicles, the accelerator pedal motion is communicated via the throttle cable. This activates the throttle linkages which in turn move the throttle plate. In automobiles with electronic throttle control, also referred to as "drive-by-wire" an electric motor regulates the throttle linkages. The accelerator pedal is attached to a sensor and not to the throttle body. This sensor sends the pedal position to the ECU or otherwise known as Engine Control Unit. The ECU is responsible for determining the throttle opening based on accelerator pedal position along with inputs from various engine sensors. The throttle body consists of a throttle position sensor. The throttle cable connects to the black portion on the left hand side that is curved in design. The copper coil placed close to this is what returns the throttle body to its idle position once the pedal is released.
The throttle plate revolves in the throttle body each time the operator applies pressure on the accelerator pedal. This opens the throttle passage and permits more air to be able to flow into the intake manifold. Typically, an airflow sensor measures this adjustment 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 connected 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 "WOT" position, the idle position or somewhere in between these two extremes.
Various throttle bodies can include adjustments and valves to be able to control the least amount of airflow during the idle period. Even in units which are not "drive-by-wire" there would usually be a small electric motor driven valve, the Idle Air Control Valve or IACV which the ECU utilizes to control the amount of air which can bypass the main throttle opening.
It is common that numerous cars have one throttle body, although, more than one could be utilized and attached together by linkages so as to improve throttle response. High performance vehicles like for example the BMW M1, along with high performance motorcycles like the Suzuki Hayabusa have a separate throttle body for each cylinder. These models are called ITBs or "individual throttle bodies."
A throttle body is similar to the carburetor in a non-injected engine. Carburetors combine the functionality of the fuel injectors and the throttle body into one. They operate by blending the air and fuel together and by modulating the amount of air flow. Vehicles which have throttle body injection, which is referred to as CFI by Ford and TBI by GM, put the fuel injectors inside the throttle body. This allows an old engine the chance to be transformed from carburetor to fuel injection without really altering the design of the engine.
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