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公开(公告)号:US10947906B2
公开(公告)日:2021-03-16
申请号:US16493795
申请日:2018-03-21
发明人: Johannes Schalk , Wolfgang Fimml , Christian Frey
摘要: A method for operating an internal combustion engine, involving the following steps: determining a target lambda value and measuring an actual lambda value for combustion in a combustion chamber of an internal combustion engine; establishing, in accordance with the target lambda value and the actual lambda value, a point in time for an intake valve associated with the combustion chamber to open; and opening the intake valve at the established point in time.
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公开(公告)号:US11149597B2
公开(公告)日:2021-10-19
申请号:US16467713
申请日:2017-12-11
发明人: Wolfgang Fimml , Jonathan Lipp , Johannes Schalk
摘要: A valve drive for an internal combustion engine, including a gas exchange valve; a first mechanically driven drive mechanism; and a second drive mechanism connected to the gas exchange valve to move same. The first and second drive mechanisms connected via a hydraulic coupling device that has a pressure chamber, which can be relieved of pressure via a valve device and is designed to couple the drive mechanisms by hydraulic pressure and to decouple same in a pressure-relieved state. The valve device has two switch valves fluidically connected to the pressure chamber in parallel and via which the pressure chamber is relieved of pressure in the open state of at least one of the switch valves. The valve drive has a controller that actuates the switch valves in a delayed manner to provide a variable valve stroke of the gas exchange valve during a stroke movement.
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