Abstract: A differential pressure switch having a piston which is guided in a piston housing in a cylinder bore against the force of a return element, the piston head having a pressure P1 applied to it, while a bore space around its tapered piston shaft has a pressure P2 applied to it. A switching process is triggered by movement of the piston, the piston tip acting on a switching element and being sealed in relation to the cylinder bore by a rolling diaphragm which is movable within the range of axial movement of the piston.

Abstract: A method for manufacturing glow plugs with central and body electrode(s) armed with noble metal inserts, in which the tip (9) of a central electrode (1) which is pyramid or conic shaped with a base diameter (d), is liquefied by being pressed against a noble metal ball (2) with diameter (d) that is mounted in the face of a welding electrode (3) under a defined welding contact pressure and defined welding parameters. The liquefied material of the central electrode tip (9) partially flows around the noble metal ball (2), and the welding electrode (3) is separated from the central electrode (1) after the liquefied material of the central electrode tip (9) has solidified with noble metal ball (2) embedded therein.

Abstract: An ion flow measurement glow plug with an electrical terminal for the ignition current of a heating element which is located in a glow tube on an end which is directed to the combustion space of an engine block. The glow tube is located in a plug housing, insulated relative to the latter, and the plug housing is electrically connected to the engine block. At a terminal-side area of the plug, a solid-state switch is integrated or modulalry arranged, which is triggered by a control signal, as a result of which the second terminal of the heating element is switched to the engine block (ground) via the plug housing.

Abstract: Ionic current measurement glow plug with electrical terminal for the glow current of a heating element which is located on the combustion space side in a glow tube, the glow tube being located in a plug housing, insulated relative to the latter, and the plug housing being electrically connected to the engine block (ground), in the terminal-side area of the plug a diode (15) being integrated or modularly located between the glow plug body (4) and the series circuit consisting of a glow tube and a heating element.

Abstract: A water preheating connection piece (6) including a connection body including a water flow channel (6a) and a bore hole (7), at least one heating rod (1) having an internal heating element and at least one regulating element for insertion into the bore of the connection body, the at least one heating rod projecting into the water flow channel (6a), the heating rod (1) including a connection pole (3) that extends from the heating rod (1) whereby the connection pole is electrically insulated from the heating rod (1). The heating rod (1) does not include external threads and the bore hole of the connection body does not include internal threads so as to permit the heating rod (1) to be press-fit therein.

Abstract: A method of producing a glow plug including a glow tube (5) with internal heating coil (4) and optionally regulating coils which are embedded therein using a ceramic filling, whereby a compaction of an area on a combustion chamber side of the glow tube (5) is performed using a recessing-reducing process with a radial feed.

Abstract: Method of joining a rod-shaped heating element with a tubular carrier element involving attaching a cylindrical carrier ring to the rod-shaped heating element using a magnetic forming process and inserting the carrier ring and the rod-shaped heating element into the tubular carrier element such that the outer circumferential surface of the carrier ring contacts the inner circumferential surface of the tubular carrier element.

Abstract: A sheathed-element glow plug including a glow plug body and a heating rod inside the glow plug body, and a heating element. Optionally, the glow plug includes a control element, embedded in insulating material, associated with said heating element which is positioned within the heating rod. The heating element, at the end facing the electrical connection, has an internal pole, with internal pole lead-in, for connection to a power source; while, the end of said heating element facing the combustion chamber is connected to the tip of the heating rod. The glow plug also includes a contact tube which is pushed onto the end region of the heating rod facing the electrical connection in order to extend the heating rod in the direction of the electrical connection to define a hollow space between the contact tube and the internal pole, internal pole lead-in, which is filled with insulating material.

Abstract: Rod glow plug with a plug body and an internal heating rod. Between the heating rod (1) and the plug body (7) in the area of a seal seat of the rod glow plug, an electrically insulating shaped part (3) securely adjoins the heating rod (1) supporting the combustion space-side end (7a) of the plug body (7), electrically insulated from the heating rod (1).

Abstract: Cold starter for use with a diesel engine having a combustion chamber, an intake air channel, and an air filter, which includes an electrical heating device mounted either in the intake air channel or within the air filter casing.

Abstract: A glow plug including a heating rod having a plug body composed of an electrically insulating plastic material, an inner pole connected to heating elements, and optionally, control elements, and an outer pole which is electrically insulated from adjoining components of the plug body by an insulative material provided between an inner and outer support tube, the inner support tube surrounding the heating rod while the plug body surrounds the outer support tube.

Abstract: Heating rod with a heating element of electrically conductive ceramic material which has a heating area which is U-shaped in the lengthwise section integrally adjoining a pair of conductors, the heating element (1a) being embedded in a heating rod body (1b) of electrically insulating ceramic mass(3).

Abstract: A glow plug including a glow plug body formed from a single piece tube, the single piece tube including a plug tip area with a glow element disposed therein, a control area with a control element disposed therein, and a connection area with an inside connection lead adapted to be connected to an electrical terminal where the plug tip area has a different diameter than the control area and/or the connection area of the single piece tube.

Abstract: A rod glow plug comprises a glow tube, inner heating coil(s) and optionally control coil(s), and a terminal pole which leads into the glow tube, the coil(s) being connected to the terminal pole and glow tube tip, there being a stabilizer rod (10) which extends in an assembly stage from the terminal pole (9) to the glow tube tip, optionally into an opening in the glow tube tip or through it, and the stabilizer rod (10) being located essentially in the middle running through the coil(s).

Abstract: A glow plug including plug body composed of an electrically insulating plastic material, a heating rod having an inner pole connected to heating elements, and optionally, control elements, and an outer pole which is electrically insulated from adjoining components of the plug body.

Abstract: This invention relates to a process for sealing of the terminal-side end area of the glow tube of a glow plug, this area of the glow tube (3) being crimped.

Abstract: A glow plug comprises a heating rod with an inner heater coil and optionally at least one control coil, the heating rod being insulated from the glow plug body and is provided with a plug-type or screw terminal for the power supply voltage. Furthermore, the terminal (4) has an electronic component (6), preferably a chip, with a terminal (7) connected to the power supply voltage, a terminal (8) connected to the glow tube (1.3) and a terminal (9) connected to the body (3). The electronic component (6) is designed as a control element for switching the functioning of the glow plug between a heating function and a sensing function for measuring the ion flow in the combustion space area in proximity to the heating rod (1).

Abstract: An electrically heatable glow plug for an internal combustion engine includes a corrosion-resistant metal jacket, a compressed powder filling contained therein, and an electrically conducting coil embedded in the filling. To increase the lifetime of the heating coil, a getter material for binding the oxygen contained in the compressed powder filling is provided. The getter material can be distributed in the form of electrically nonconducting particles in the compressed powder filling. The getter material can also be applied as a coating to the coil or to the inner surface of the metal jacket.

Abstract: A spark plug, especially one for a gas-fueled internal combustion engine has an electrically conducting spark plug body (1), a central electrode (3) which is located in the spark plug body (1) and which is electrically insulated from and projects away from the spark plug body (1), and a ground electrode (4) which is electrically connected to the spark plug body (1) and is made in the form of an annular electrode. The annular electrode (4) surrounds the front part of central electrode (3) such that an annular ignition gap (ZS) is formed between them. Surfaces of the central electrode (3) and the annular electrode (4) bordering the ignition gap (ZS) are provided with precious metal armorings in the form of sleeves (5, 6,), especially of platinum or a platinum alloy. This yields a spark plug with an extremely long service life.

Abstract: An electrically heatable glow plug for an internal combustion engine includes a corrosion-resistant metal jacket, a compressed powder filling contained therein, and an electrically conducting coil embedded in the filling. To increase the lifetime of the heating coil, a getter material for binding the oxygen contained in the compressed powder filling is provided. The getter material can be distributed in the form of electrically nonconducting particles in the compressed powder filling. The getter material can also be applied as a coating to the coil or to the inner surface of the metal jacket.