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    • 8. 发明专利
    • DE50201643D1
    • 2004-12-30
    • DE50201643
    • 2002-08-01
    • AVL LIST GMBH
    • LAIMBOECK FRANZ
    • F01L3/06F02B31/00F02F1/42
    • The invention relates to a cylinder head ( 1 ) for an internal combustion engine with at least one inlet channel ( 3 ), which generates a swirling flow (S) in the combustion chamber ( 2 ), preferably curved in the direction of the swirling flow (S) with an external wall region ( 3 a) and an internal wall region ( 3 b) relative to the swirling flow (S). A valve seat ring ( 4 ) is arranged in the region of the opening ( 9 ) of the inlet channel ( 3 ) into the combustion chamber ( 2 ). According to the invention, a strong swirling flow (S) without significant reduction of the flow cross-section of the inlet channel ( 3 ) may be achieved whilst keeping the mechanical loading on the cylinder head to a minimum, whereby the external wall region ( 3 a), in the region of the valve seat ring ( 4 ), is at least partly formed by a projection ( 11 ) of the cylinder head ( 1 ) within an internal surface ( 4 a) of the valve seat ring ( 4 ), whereby the internal surface ( 4 a) of the valve seat ring ( 4 ) extends beyond said projection ( 11 ).
    • 9. 发明专利
    • AT284482T
    • 2004-12-15
    • AT02750629
    • 2002-08-01
    • AVL LIST GMBH
    • LAIMBOECK FRANZ
    • F02B31/00F02B31/02F02B31/08F02D9/02F02D9/10F02F1/42F02M69/00
    • An internal combustion engine includes at least two intake valves per cylinder, and at least two intake ports leading to the intake valves, a first intake port preferably being configured as unthrottled tangential passage and the flow through a second intake port being controlled by means of a first throttle element (11) actuated in dependence of at least one engine parameter, and at least one fuel injector per cylinder injecting fuel into at least two intake ports, wherein in the closed position of the first throttle element at least one leakage aperture will permit a defined minimum flow through the second intake port. To improve emission values of the engine in a simple manner, the first throttle element is positioned downstream of the fuel injector and that at least one leakage aperture is provided in the area impinged on by at least one injection jet, the first throttle element in its closed position forming an obtuse angle (alpha) of greater than 90 ° with a partition wall between the first and second intake port so that the inlet air flow will be diverted towards the first intake port.