Abstract: To produce sealing plates (1) consisting of a plurality of sealing rings (3) connected by radial webs (2) by injection molding, wall-type guide elements (5) are arranged obliquely to the direction of flow in the mold channel (6) which is therefore initially largely constricted in the region of weld lines (15) formed by the convergence of the fronts of the divided plastic melt streams, said guide elements being moved out of the mold channel (6) during the further filling of same so that the strength is significantly improved in the region of the weld lines (15).

Abstract: A circuit for controlling current flow to an associated inductive load is provided. The circuit includes a switching element having an open state and a closed state that intermittently connects an associated power supply to the inductive load when the switching element is in the closed state, a switch driver that generates a switch drive signal provided to a control element of the switch that controls the state of the switch to be the open state or the close state based on a desired load current set point and a feedback signal, a current sensor that measures a current flowing through the switching element and the load and generates a sensed current signal, and a summing circuit that adds a representation of the sensed current signal and a supplemental signal comprising a representation of the switch drive signal to generate the feedback signal.

Abstract: The invention relates to a gas metering valve (1) for a dual fuel engine (17), which has a displaceable closing body (6) which, in a position of resting against a valve seat (5), closes the gas metering valve (1) and, in a position of being lifted off from the valve seat (5), opens the gas metering valve (1). The gas metering valve (1) is actuatable in a gas operating mode, in which the gas metering valve (1) meters combustion gas via a gas channel (13) into an intake manifold (15) of the dual fuel engine (17), and in a liquid fuel operating mode, in which the gas metering valve (1) remains sealingly closed against the pressure prevalent in the intake manifold (15).

Abstract: To produce sealing plates (1) consisting of a plurality of sealing rings (3) connected by radial webs (2) by injection molding, wall-type guide elements (5) are arranged obliquely to the direction of flow in the mold channel (6) which is therefore initially largely constricted in the region of weld lines (15) formed by the convergence of the fronts of the divided plastic melt streams, said guide elements being moved out of the mold channel (6) during the further filling of same so that the strength is significantly improved in the region of the weld lines (15).

Abstract: A combustion chamber injection nozzle (12) having a plurality of injection channels (37) for a main fuel gas, a pre-combustion chamber, and a plurality of torch channels (52) for hot combustion gas connected to the pre-combustion chamber (15), the injection channels (37) and the torch channels (52) communicating with peripheral openings arranged next to one another so as to alternate in a circumferential direction.

Abstract: A fuel gas feed and ignition apparatus for a gas engine (1) with a combustion chamber includes a number of injection channels (37), a main fuel gas feed line (24) for main fuel gas in which a main fuel gas valve (21) is arranged, and a number of torch channels (52) for hot combustion gas connected to a pre-combustion chamber (15), wherein an ignition fuel supply line (17) leads to the pre-combustion chamber (15) and a pre-combustion chamber valve (18) is arranged in the ignition fuel supply line (17). Control of both the time and the duration and thus also the quantity of the injection of main fuel gas, as well as of ignition fuel for the pre-combustion chamber completely independently of one another and in a precise and, above all, rapid manner is achieved in that both the main fuel gas valve (21) and the pre-combustion chamber valve (18) are embodied as an electrically-actuated, electronically-controlled valve.

Abstract: In order to prevent working medium from accumulating in the compressor housing (2) of a piston compressor (1) in a simple manner by means of a sealing of the piston rod (7) in the form of sealing medium barrier supplied by a hydraulic unit (12), it is provided that a ventilator (32) and a sealing medium container (37), which is partially filled with sealing medium, are provided in the hydraulic unit (12), wherein the ventilator (32) suctions air from the free space of the sealing medium container (37), and the free space (45) in the sealing medium container (37) is connected via a line (15, 17) to the compressor housing (2), and an opening (16) is provided at the compressor housing (2) for connecting the interior of the compressor housing (2) to a purge gas reservoir (18).

Abstract: A valve plate (1) made of fiber-reinforced plastic for gas exchange valves for reciprocating piston compressors comprises at least two concentric sealing rings (3) which cooperate with corresponding sealing surfaces (4) at the valve seal (5) by way of profiled sealing surface (2) and that are connected by way of radial webs (6). In order to improve the flexibility of the valve plate (1) and the sealing behavior, the webs (6) are designed thinner along the entire radial extent thereof between the sealing rings (3) on both sides of the valve plate (1) compared to the adjacent thickness of the sealing rings (3).

Abstract: An unloader ring 20 has a plurality of unloader fingers 21 passing through intake channels 16 of the intake valve 5 arranged in the ring-shaped intake chamber 11 such that the unloader ring 20 is guided on the wall 24, 31 of the intake chamber 11, where it is arranged displaceably by means of the circumferential surface 23 of the unloader ring 20 on the outside radially or by the circumferential surface 30 of the unloader ring 20 on the inside radially. A radial step 25 is provided on the circumferential surface 23 of the unloader ring on the outside radially or on the circumferential surface 30 of the unloader ring 20 on the inside radially, and a control chamber 26 is formed between the wall 24, 31 of the intake chamber 11 and the radial step 25, this control chamber being connected to a control line 27 for supplying a control medium into the control chamber 26.

Abstract: A shutoff valve (2) which is switchable in a cycled manner for capacity regulation by temporarily shutting off the intake gas feed is designed as a multi-element ring valve, and is directly actuated by means of an electromagnet (12). The actuating forces for switching the shutoff valve (2) may be kept small via pressure compensation from the intake gas feed (3) to behind the anchor plate (9).

Abstract: High temperatures of the sealing medium occur in a hydraulic sealing medium barrier for sealing a piston rod of a piston compressor, and there is the risk of soil and abrasion being deposited there and interfering with the function of the seal. To prevent this, a sealing configuration (1) which is provided for circulating sealing medium through an outlet line (11) for sealing medium which is connected to the recess (10), and a circulating device (13) is provided, with which the sealing medium is circulated through the recess (10) while maintaining the pressure (poil) of the sealing medium through the inlet and the outlet line (7, 11).

Abstract: An unloader for a valve element (30) of a compressor valve (40) includes an unloader finger (2) and one carrier bushing (14), wherein the unloader finger (2) is fabricated from a first material, the carrier bushing (14) is fabricated from a second material using a casting method, and at least part of the unloader finger (2) is mold in with the material of the carrier bushing (14).

Abstract: A cylinder head for a two-stage reciprocating piston compressor includes an intercooler that is designed as a cooled overflow channel between the pressure side of the first stage and the suction side of the second stage, wherein the overflow channel has a substantially slot-like cross-section, and the overflow channel is in addition divided by at least one indirectly cooled center rib so that therefrom at least two overflow channel portions and are created. The cylinder head has a cylinder head upper part and a cylinder head lower part, the cross-section of the indirectly cooled center rib is divided in its longitudinal extent thereby forming a passage gap between the overflow channels and that run on both sides, and one portion of the center rib is formed from the cylinder head upper part and the other portion of the center rib is formed from the cylinder head lower part.

Abstract: In order to reduce AC ringing of the secondary voltage after the spark event in a capacitive ignition system, which would influence ion-sensing, a secondary winding current (IR) flowing through the secondary winding (4) after the spark event is forced to flow through a forward-biased muting diode (D1) that is connected across the secondary winding (4).

Abstract: The invention relates to a gas metering valve (1) for a dual fuel engine (17), which has a displaceable closing body (6) which, in a position of resting against a valve seat (5), closes the gas metering valve (1) and, in a position of being lifted off from the valve seat (5), opens the gas metering valve (1). The gas metering valve (1) is actuatable in a gas operating mode, in which the gas metering valve (1) meters combustion gas via a gas channel (13) into an intake manifold (15) of the dual fuel engine (17), and in a liquid fuel operating mode, in which the gas metering valve (1) remains sealingly closed against the pressure prevalent in the intake manifold (15).

Abstract: For a fuel gas feed and Ignition apparatus for a gas engine (1) with a combustion chamber injection nozzle (12) in which a number of injection channels (37) are provided for a main fuel gas, and the injection channels (37) are connected to a main fuel gas feed line (24) for main fuel gas in which a main fuel gas valve (21) is arranged, and in which combustion chamber injection nozzle (12) are also provided a number of torch channels (52) for hot combustion gas and the torch channels (52) are connected to a pre-combustion chamber (15) in the fuel gas feed and ignition apparatus (10), wherein an ignition fuel supply line (17) leads to the pre-combustion chamber (15) and a pre-combustion chamber valve (18) is arranged in the ignition fuel supply line (17), control of both the time and the duration and thus also the quantity of the injection of main fuel gas, as well as of Ignition fuel for the pre-combustion chamber completely independently of one another and in a precise and, above all, rapid manner is achieved

Abstract: In order to achieve reliable, well-controlled and fast diffusion combustion in an air-intake gas engine, a combustion chamber injection nozzle (12) is proposed over whose periphery is distributed a plurality of injection channels (37) for a main fuel gas and a plurality of torch channels (52) for hot combustion gas that are connected to the pre-combustion chamber (15), wherein the injection channels (37) and the torch channels (52) are arranged next to one another so as to alternate in the circumferential direction.

Abstract: A fluid mixer in the form of a Venturi tube includes a divergent section (A2) with a steady contour curve having at least two inflection points (W1, W2) to reduce flow separations.

Abstract: An air/fuel ratio controller (6) and a method that uses an upstream control loop to maintain a given optimum air/fuel ratio (?opt), whereas the optimum air/fuel ratio (?opt) is determined in the controller (6) in an downstream control loop by adding incremental offset (??) to the air/fuel ratio set-point (?SP) of an upstream control loop while monitoring a NOx sensor (10) output. The air/fuel ratio set-points (?SP) at two turning points (SP1, SP2) in the NOx sensor (10) output are used to calculate a new optimum air/fuel ratio set-point (?opt) as mean value of the air/fuel ratio set-points (?SP1, ?SP2) at the turning points (SP1, SP2).

Abstract: High temperatures of the sealing medium occur in a hydraulic sealing medium barrier for sealing a piston rod of a piston compressor, and there is the risk of soil and abrasion being deposited there and interfering with the function of the seal. To prevent this, a sealing configuration (1) which is provided for circulating sealing medium through an outlet line (11) for sealing medium which is connected to the recess (10), and a circulating device (13) is provided, with which the sealing medium is circulated through the recess (10) while maintaining the pressure (poil) of the sealing medium through the inlet and the outlet line (7, 11).