摘要:
The invention concerns a hydraulic valve actuator for reciprocating engine comprising at least a hydraulic cylinder (3) for opening at least one valve (2) via at least one valve opening selector (11) by means of at least one hydraulic positive displacement pump (4) whereof the hydraulic fluid supplied at the output can be forced into a high pressure circuit (10) by at least one pump outlet closure (8), said valve (2) capable of being maintained opened by means of an opening non-return valve (24), then of being reseated by means of a valve closing selector (25) which directs the hydraulic fluid contained in the hydraulic cylinder (3) in the hydraulic positive displacement pump (4) input by co-operating with a pump input non-return valve (26).
摘要:
The invention relates to a valve drive for a gas exchange valve (4) of a prime mover or working machine, which comprises a magnetic rotor (12) that extends with a gas exchange valve (4) distal rotor section within a stator (1) provided with a current coil (18) so as to be longitudinally displaceable therein in such a manner that an end of the rotor (12) projecting from the stator (1) actuates the gas exchange valve (11) when the current coil (18) is excited. The rotor (12), in the area of the rotor section, is preferably configured as a vertically mobile rotor plate (11) having a flat side valve-type design, wherein individual magnetic elements (21) are aligned in a plurality of planes.
摘要:
The invention concerns a hydraulic valve actuator for reciprocating engine comprising at least a hydraulic cylinder (3) for opening at least one valve (2) via at least one valve opening selector (11) by means of at least one hydraulic positive displacement pump (4) whereof the hydraulic fluid supplied at the output can be forced into a high pressure circuit (10) by at least one pump outlet closure (8), said valve (2) capable of being maintained opened by means of an opening non-return valve (24), then of being reseated by means of a valve closing selector (25) which directs the hydraulic fluid contained in the hydraulic cylinder (3) in the hydraulic positive displacement pump (4) input by co-operating with a pump input non-return valve (26).
摘要:
The invention relates to an electromotive device for operating gas exchange valves on internal combustion engines, comprising a rotary actuator exerting forces on one or more valve stem ends of one or more gas exchange valves by means of a lever arrangement. The rotary actuator is a reluctance motor with a cylindrical iron rotor with permanent magnet segments of alternating magnetisation arranged on the circumference thereof. The average angular separation of the poles of the stator of the reluctance motor are approximately equal to the average angular separation of the permanent magnet segments on the rotor. The valve shaft ends operated by the lever arrangement preferably belong to gas exchange valves of a cylinder of an internal combustion engine the opening times of which do not coincide or belong to gas exchange valves on different cylinders. The reluctance motor preferably has a single-phase design. The device permits a valve clearance adjustment of the gas exchange valves by control of the actuator current and carrying out part lifts. The electromotive device for operating gas exchange valves is space-saving, low in energy consumption nd wear and self-retaining in certain working positions.
摘要:
The invention relates to a method and a device for actuating, without any mechanical shock, a valve integrated in the piston of an internal combustion engine.
摘要:
In an engine electromagnetic valve operating device (20), an intake valve (17) is opened and closed by means of a first electromagnet (21), which is fixed to a cylinder head, and a second electromagnet (22), which is pivotably supported on the cylinder head by a fixed shaft (38) so as to be capable of swinging, attracting a first attraction face (23b) and a second attraction face (23c) respectively of an armature (23) having one end pivotably supported on the cylinder head by the fixed shaft (38) so that it can swing and having the other end abutting against a stem (18) of the intake valve (17). In this arrangement, by changing the angle between the first and second electromagnets (21, 22) by swinging the second electromagnet (22), the amount of lift of the intake valve (17) can be changed freely. Furthermore, since only at least one of the first and second electromagnets (21, 22) needs to be made to swing and, moreover, it is unnecessary to move the position of the armature (23), it is possible to form the electromagnetic valve operating device (20) compactly.
摘要:
The gas-exchange valve control for a valve-controlled internal combustion engine comprises a hollow cylindrical rotor (16) that can be coupled to a valve member and a stator (18). The rotor has permanent-magnetic rings (30) positioned concentrically one above the other. The stator consists at least partially of a soft magnetic material and has at least one tooth (22) facing towards the rotor. The stator comprises a magnetically conductive region (50), which is situated radially in its interior and a magnetically conductive region (52), which is situated radially on its exterior, the rings of the rotor being located between the interior and exterior regions of the stator. At least one part (54) of the exterior region of the stator has a C-shaped cross-section and at least one stator coil (28). At least one tooth (42) is configured on the interior magnetically conductive region and/or on the external magnetically conductive region of the stator in the displacement direction of the rotor. The proportions of said tooth in the displacement direction of the rotor are substantially equal to the proportions of a permanent-magnetic ring in the displacement direction of the rotor, in such a way that in a predetermined position of the rotor, the tooth/teeth of the stator is/are aligned with a permanent-magnetic ring.
摘要:
The invention relates to an electromotive device for operating gas exchange valves on internal combustion engines, comprising a rotary actuator exerting forces on one or more valve stem ends of one or more gas exchange valves by means of a lever arrangement. The rotary actuator is a reluctance motor with a cylindrical iron rotor with permanent magnet segments of alternating magnetisation arranged on the circumference thereof. The average angular separation of the poles of the stator of the reluctance motor are approximately equal to the average angular separation of the permanent magnet segments on the rotor. The valve shaft ends operated by the lever arrangement preferably belong to gas exchange valves of a cylinder of an internal combustion engine the opening times of which do not coincide or belong to gas exchange valves on different cylinders. The reluctance motor preferably has a single-phase design. The device permits a valve clearance adjustment of the gas exchange valves by control of the actuator current and carrying out part lifts. The electromotive device for operating gas exchange valves is space-saving, low in energy consumption nd wear and self-retaining in certain working positions.