1. Field of the Invention
The present invention relates to automotive vehicles, more particularly to, fluid flow through a throttle body on an engine for automotive vehicles.
2. Description of Related Art
Currently, a throttle body on an engine has a throttle plate for controlling the amount of air that flows to the cylinders of the engine. During engine operation, the amount of air desired to perform idle speed conditions is typically controlled electronically. The path of the air must travel from above the throttle plate, bypassing the throttle plate via a drilling from inside the throttle body, to an orifice that meters the air by means of an electronically controlled stepper motor. The air metered from the orifice is finally dumped below the throttle plate to be mixed within fuel downstream.
One problem with the above circuitry is that a separate casting is used to house the stepper motor, resulting in extra machining and parts to secure the stepper motor to the throttle body. Another problem is that the path for idle speed air is interrupted by externally machined communication drillings and plugs.
It is, therefore, an object of the present invention to provide an automatic idle speed circuitry which eliminates the us of unnecessary drillings and external plugs to complete the circuitry. It is another object of the present invention to provide a path for idle speed air that is uninterrupted by externally machined communication drillings and plugs. It is still another object of the present invention to provide a low cost automatic idle speed circuitry.