| The butterfly valve is not activated by a cable in the electronic accelerator. There is no mechanical connection between the accelerator and the butterfly valve. |
| The position of the accelerator is transmitted to the Engine control unit -J623- by two accelerator position sensors (variable resistance; stored in a case), which are connected to the accelerator. |
| The accelerator position (at the driver's criterion) is the main input value for the Engine control unit -J623-. |
| The butterfly valve is activated by an electric engine (butterfly element) incorporated to theAccelerator butterfly valve command unit - J338-, in all load and rotation intervals. |
| The butterfly valve is activated by a butterfly element, due to the data provided by the Engine control unit -J623-. |
| With the engine turned off and the ignition connected, the Engine control unit -J623- activates the butterfly element, due to the data provided by the Accelerator pedal position sensor -G79-. This means that if the accelerator is half activated, the butterfly element will open proportionally, that is, the butterfly valve will be half opened. |
| With the engine running (loaded), the Engine control unit -J623- may open or close the butterfly, regardless of the Accelerator pedal position sensor - G79-. |
| This way, the butterfly valve may, for instance, be completely open already, even if the accelerator is only half activated. The advantage is avoiding losses for chocking, caused by the butterfly valve. |
| Also, this enables lower pollutant consumption and emissions for certain load conditions. |
| The necessary torque may be obtained by the Engine control unit -J623-, through an optimum combination between the butterfly valve opening and the over-supply pressure. |
| Believing that the “electronic accelerator” comprises only one or two components would be a mistake. The electronic accelerator is a system comprised of all the components that contribute to determining the position of the butterfly valve, in order to adjust it and activate it, such as for example, theAccelerator pedal position sensor -G79-, the Accelerator butterfly valve command unit -J338-, the "E-gas" system fault warning light -K132-, the Engine control unit -J623-, etc). |
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