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公开(公告)号：US12006851B2
公开(公告)日：2024-06-11
申请号：US17435228
申请日：2020-02-25
Applicant: FREEVALVE AB
Inventor： Urban Carlson , Rowhan Toi Neilson
CPC classification number: F01L9/16 , F01L9/40 , F01P5/10 , F15B1/04 , F25B45/00 , G05D16/208 , F25B2345/006 , F25B2400/19 , F25B2600/2523
Abstract: A pressure fluid handling system includes a closed pressure fluid circuit. The pressure fluid circuit includes, connected in series, a compressor and a pressure sink and a primary pressure fluid route from the compressor to the pressure sink and a secondary pressure fluid route from the pressure sink to the compressor. The pressure fluid handling system further includes a pressure fluid accumulator connected to the pressure fluid circuit via a first pressure fluid accumulator conduit. The first pressure fluid accumulator conduit includes a pump configured to pump pressure fluid from the pressure fluid circuit to the pressure fluid accumulator to lower the pressure levels in the pressure fluid circuit, and in that the pressure fluid handling system includes a controllable component for returning the pressure fluid from the pressure fluid accumulator to the pressure fluid circuit to increase the pressure levels in the pressure fluid circuit.
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公开(公告)号：US10690022B2
公开(公告)日：2020-06-23
申请号：US15567035
申请日：2016-04-15
Applicant: FREEVALVE AB
Inventor： Anders Hoglund , Urban Carlson
Abstract: Disclosed is an actuator for axial displacement of an object, including a cylinder volume having a first portion, and an actuator piston disc displaceable in the axial direction in the cylinder volume between inactive and active positions, an inlet channel between a pressure fluid inlet and the first portion of the cylinder volume, a first inlet valve body in the inlet channel, an outlet channel between the first portion of the cylinder volume and a pressure fluid outlet, and an outlet valve body in the outlet channel. The slave piston is displaceable in a bore, the slave piston displacing the first inlet valve body to an active position, and interacting with an opening connecting the bore and a control pressure channel, the opening having a first flow area with the slave piston in its inactive position and a larger second flow area with the slave piston in its active position.
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公开(公告)号：US10077689B2
公开(公告)日：2018-09-18
申请号：US15025436
申请日：2014-10-08
Applicant: FREEVALVE AB
Inventor： Anders Hoglund , Urban Carlson , Christian Von Koenigsegg
Abstract: A combustion engine includes, a first controllable engine valve (8) arranged to selectively open/close a combustion chamber (7) included in the combustion engine (1), and a gas handling system arranged to drive the first engine valve (8), which gas handling system includes a closed pneumatic pressure fluid circuit, wherein the closed pressure fluid circuit includes, coupled in series with each other, a compressor (31) and a valve actuator (10) that are operatively connected to the first engine valve (8). The combustion engine is characterized by the gas handling system further including a gas accumulator (38) that is connected with the closed pressure fluid circuit via at least one gas accumulator conduit (39), which includes a controllable valve (40). A gas handling system for pneumatic control of a valve actuator is also described.
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公开(公告)号：US12012878B2
公开(公告)日：2024-06-18
申请号：US17908435
申请日：2021-03-01
Applicant: FREEVALVE AB
Inventor： Anders Höglund , Eric Griess , Daniel Jakobsson , Urban Carlson
CPC classification number: F01L1/465 , F01L9/16 , F01L2820/034
Abstract: An actuator and a method for controlling such an actuator suitable for operating at least one gas exchange valve arranged in a cylinder head of an internal combustion engine. The actuator includes: an actuator piston disc, a cylinder volume adapted for the actuator piston disc, where the actuator piston disc divides the cylinder volume in a first portion and a second portion, an inlet channel arranged between a pressure fluid inlet and the first portion of the cylinder volume, a controllable first inlet valve arranged in the inlet channel, a controllable second inlet valve arranged downstream the controllable first inlet valve, an outlet channel arranged between the first portion of the cylinder volume and a pressure fluid outlet, and a controllable outlet valve arranged in the outlet channel.
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公开(公告)号：US11078855B2
公开(公告)日：2021-08-03
申请号：US16645895
申请日：2018-09-10
Applicant: FREEVALVE AB
Inventor： Anders Höglund , Urban Carlson
Abstract: An internal combustion engine includes combustion chambers, each having a controllable intake valve controlling an intake port, a controllable exhaust valve controlling an exhaust port, a piston, and a fuel injector. An intake manifold is connected to the intake port of each chamber. In catalytic converter warm-up mode, each chamber is driven in four-stroke operation including a 720 crank angle degrees cycle, and opens the intake port, starting to open in 90-180 CAD, and fully closes the intake port in 180-270 CAD, opens the exhaust port during the power stroke, starting in 405-495 CAD, opens the intake port during the exhaust stroke, starting in 610-690 CAD, and fully closes the exhaust port during the exhaust stroke in 630-710 CAD. Exhaust gas is forced into the intake manifold by the piston, mixing fuel and exhaust in the intake manifold, and fully closes the intake port in 700 to 720+20 CAD.
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Patent Agency Ranking
公开(公告)号：US10989149B2
公开(公告)日：2021-04-27
申请号：US16645873
申请日：2018-09-10
Applicant: FREEVALVE AB
Inventor： Anders Höglund , Urban Carlson
Abstract: An internal combustion engine includes combustion chambers, each having a controllable intake valve opening and closing an intake port, a controllable exhaust valve opening and closing an exhaust port, a piston displaceable back and forth in the combustion chamber between a top dead center and a bottom dead center, and a fuel injector. The engine further including an intake manifold connected to the intake port of each combustion chamber. The engine can be operated in a low load mode, wherein each combustion chamber is driven in four-stroke operation including a 720 crank angle degrees cycle, and opens the intake port during the exhaust stroke, the intake port starting to open in 610-690 CAD, closing the exhaust port during the exhaust stroke, becoming fully closed in 630-710 CAD, forcing exhaust gas into the intake manifold by the piston, and mixing fuel and exhaust gas in the intake manifold.
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公开(公告)号：US11215131B2
公开(公告)日：2022-01-04
申请号：US16494626
申请日：2018-03-16
Applicant: FREEVALVE AB
Inventor： Anders Höglund , Urban Carlson
IPC: F02D41/00 , F02M26/04 , F02M26/08 , F02M26/14 , F02M26/17 , F02M26/43 , F02B37/02 , F02D13/02 , F02M35/10 , F02B37/00 , F02B37/013
Abstract: An internal combustion engine includes combustion chambers, each having a first intake port, and first and second exhaust ports. An intake manifold is connected to the first intake port of each combustion chamber, a main pressure booster upstream of the intake manifold. An exhaust discharge arrangement includes a main exhaust manifold connected to the first exhaust port of each combustion chamber, the exhaust discharge arrangement connected to the second exhaust port of a first subset combustion chambers, and an exhaust recirculation manifold connected to the second exhaust port of a second subset combustion chambers and connected to an upstream side of the main pressure booster. The engine operates in high load and low load modes, which vary how the engine evacuates the exhaust gas of the second subset combustion chambers to the exhaust recirculation manifold. A related method is also disclosed.
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公开(公告)号：US10577988B2
公开(公告)日：2020-03-03
申请号：US15566993
申请日：2016-04-15
Applicant: FREEVALVE AB
Inventor： Anders Hoglund , Urban Carlson
Abstract: Disclosed is an actuator including a cylinder volume having a first portion, and an actuator piston disc displaceable in the cylinder between inactive and active positions, an inlet channel between a pressure fluid inlet and the first portion of the cylinder volume, a first inlet valve body in the inlet channel, an outlet channel between the first portion of the cylinder volume and a pressure fluid outlet, and an outlet valve body in the outlet channel. The slave piston is displaceable in a bore between inactive and active positions. The first inlet valve body includes a seat valve body having an inactive position closing the inlet channel, the slave piston, in moving from inactive to active positions, rams the first inlet valve body, displacing it to an active position at which the inlet channel is open, the outlet valve body being connected to and jointly displaceable with the slave piston.
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公开(公告)号：US09988952B2
公开(公告)日：2018-06-05
申请号：US15029851
申请日：2014-10-08
Applicant: FREEVALVE AB
Inventor： Anders Hoglund , Urban Carlson , Christian Von Koenigsegg
Abstract: A combustion engine includes a cylinder head including a controllable engine valve configured to open/close a combustion chamber in the combustion engine, a valve actuator operatively connected with and configured to displace the engine valve, and a closed pressure fluid circuit, wherein the valve actuator is arranged in the closed pressure fluid circuit. The combustion engine includes a cylinder head chamber that is included in the closed pressure fluid circuit and that is delimited by the cylinder head and a cylinder head mantle, by the valve actuator including a pneumatic pressure fluid circuit with an outlet opening that is in fluid communication with the cylinder head chamber, and by the cylinder head chamber including a hydraulic liquid drainage valve, wherein a drainage conduit stretches from the hydraulic liquid drainage valve to a hydraulic liquid vessel of the combustion engine for draining hydraulic liquid accumulated in the cylinder head chamber.
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公开(公告)号：US10746064B2
公开(公告)日：2020-08-18
申请号：US16336946
申请日：2017-09-25
Applicant: FREEVALVE AB
Inventor： Anders Höglund , Urban Carlson
IPC: F16K31/06 , F01L9/02 , F15B13/044 , F16K11/048 , F16K11/056 , F16K31/00 , F16K31/08 , F16K11/24
Abstract: A multi-way valve includes a control pressure channel, first and second control fluid channels, a valve body in the first and second control fluid channels, and an electrically controlled device having a drive member and an armature. The armature moves back and forth by the drive member between inactive and active positions. Movement of the armature from the inactive to the active position displaces the valve body arrangement to an active position, closing the first and opening the second control fluid channel is open. The electrically controlled device includes a drive body connected to the armature and a first spring member between the armature and the drive body. The valve body arrangement is biased towards the inactive position by a second spring member. The armature in the inactive position is biased towards the active position by a third spring member. Also disclosed is an actuator including the valve.
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