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公开(公告)号：US10794242B2
公开(公告)日：2020-10-06
申请号：US16078723
申请日：2016-03-14
Applicant: VOLVO TRUCK CORPORATION
Inventor： Per Persson
IPC: F01L13/00 , F01L1/18 , F01L1/26 , F01L13/06 , F01L1/24 , F01L1/08 , F01L1/14 , F01L1/46 , F01L1/20
Abstract: A gas valve actuation device for an internal combustion engine includes a first arrangement for actuating two gas valves in a first lift event, a second arrangement for selectively actuating a first one of the two gas valves in a second lift event, a fluid circuit for controlling actuation of the first gas valve in the second lift event, wherein the fluid circuit includes a first fluid circuit valve which is arranged to be controlled by the first actuation arrangement.
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公开(公告)号：US11002157B2
公开(公告)日：2021-05-11
申请号：US16493824
申请日：2017-03-27
Applicant: VOLVO TRUCK CORPORATION
Inventor： Per Persson
Abstract: The present invention relates to a rocker arm (16) for an internal combustion engine (12). The rocker arm (16) comprises a cavity (41) with a cavity wall (42) at least partially accommodating a lash adjustment piston (44) for hydraulic lash adjustment. The rocker arm (16) further comprises a lash stop surface (46). At least a portion of the lash adjustment piston (44) is adapted to abut the lash stop surface (46) during at least one operating condition of the rocker arm (16). The cavity (41) comprises a lash adjustment chamber (50) at least partially delimited by the lash adjustment piston (44). The rocker arm (16) further comprising a control fluid conduit (52) and a valve assembly (54) located between the lash adjustment chamber (50) and the control fluid conduit (52), as seen in an intended direction of flow from the control fluid conduit (52) to the lash adjustment chamber (50).
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公开(公告)号：US10648373B2
公开(公告)日：2020-05-12
申请号：US16077645
申请日：2016-02-16
Applicant: VOLVO TRUCK CORPORATION
Inventor： Per Persson
Abstract: A device for actuating at least one valve in an internal combustion engine includes a camshaft arrangement including a hollow outer shaft and an inner shaft, which is concentrically mounted inside of the outer shaft to be pivotable relative to the outer shaft. A first cam lobe is mounted on one of the inner shaft and the outer shaft in a rotationally fixed manner and a second cam lobe is mounted on the other of the inner shaft and the outer shaft in a rotationally fixed manner. The device further includes a rocker arm arrangement including a first primary rocker arm, which is arranged to follow the first cam lobe and arranged to actuate a first valve when it follows the first cam lobe. The rocker arm arrangement further includes an auxiliary rocker arm, which is arranged to follow the second cam lobe. The auxiliary rocker arm is adapted to actuate the first primary rocker arm so that an opening tune of the first valve may be extended by the auxiliary rocker arm following the second cam lobe.
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公开(公告)号：US11959425B2
公开(公告)日：2024-04-16
申请号：US17756010
申请日：2019-11-13
Applicant: VOLVO TRUCK CORPORATION
Inventor： Per Persson , Martin Svensson
CPC classification number: F02D13/0207 , F01L1/053 , F01L1/344 , F01L13/0015 , F02D13/0265 , F02D41/0245 , F01L2001/0537 , F01L2001/34496 , F01L2013/105 , F01L2201/00 , F01L2820/01 , F02D2041/001 , F02D2200/0802
Abstract: A method for controlling a valve arrangement for an internal combustion engine, the valve arrangement including a piston arrangement comprising a piston having a piston end portion facing an inlet valve of the valve arrangement. The method includes receiving a signal indicative of a temperature level of an exhaust gas after treatment system and when the signal indicates a temperature level below a predetermined threshold level: advancing an exhaust event of the internal combustion engine; and controlling the piston arrangement for reducing the distance between the piston end portion and the inlet valve before the internal combustion engine assumes an air intake event.
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