| 摘要 |
A method and apparatus are provided for impulse charging an internal combustion engine having at least one cylinder in which a piston moves in a stroke movement. The apparatus includes a selectively energizeable magnetic surface disposed in a charging duct of the engine and a closure element disposed in the charging duct relative to the selectively energizeable magnetic surface. Upon energization of the magnetic surface, the closure element is moved from an open position in which a cross section of the charging duct is available for flow therethrough toward the cylinder to a closed position in which the energized magnetic surface retains the closure element by magnetic force at a disposition in which the closure element reduces the cross section of the charging duct in a manner which substantially prevents the flow of fluid therethrough toward the cylinder. The closure element can be retained in its closed position during at least the initial intake movement of the piston in the cylinder such that an underpressure is created downstream of the closure element relative to the direction of fluid flow from the charging duct to the cylinder and, during this period of the underpressure, the closure element can be released to move from its closed position to its open position by de-energization of the magnetic surface. The movement of the closure element is facilitated by the underpressure and the upstream force of the fluid flow against the closure element which increases in correspondence with the increasingly available larger cross section of the charging duct.
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