Abstract: A vehicle heater includes a burner assembly unit (12) with a combustion chamber (18) to be fed with combustion air (V) and fuel (B) and a flame tube (24). A heat exchanger assembly unit (14) includes an inner heat exchanger housing (28) with an inner circumferential wall (30) and an outer heat exchanger housing (34) with an outer circumferential wall (36). A heat transfer medium flow space (40) is between the inner and outer heat exchanger housings, which are elongated in a longitudinal axis (L) direction. A waste gas backflow space (44), between the inner circumferential wall (30) and the flame tube, opens towards an exhaust gas outlet. A catalytic converter device (52) is provided in the waste gas backflow space associated with an energizable heating unit (58), or/and insulation material (64) is provided on an outer side (62) facing away from the heat transfer medium flow space.

Abstract: A fuel-operated vehicle heater includes a burner area (12) with a combustion chamber (14); a fuel pump (24); and a combustion air blower (28). A pressure sensor (38) detects a feed back pressure. An actuating unit (36) actuates the fuel pump (24) with a predefined value of a pump operating variable, and actuates the combustion air blower with a predefined value of a blower operating variable. A heater process includes detecting the feed back pressure in case of a feed operating state set during the combustion operation and comparing the detected feed back pressure (Pe) with an expected feed back pressure (PE) for the set feed operating state. If the detected feed back pressure deviates from the expected feed back pressure the pump operating variable is changed such that the feed back pressure changes toward the expected feed pressure and/or essentially corresponds to the expected feed back pressure.

Abstract: A method is provided for operating a fuel-operated vehicle heater (10) during a start phase of combustion operation. The heater includes a combustion air feed device (26) feeding air and a fuel feed device (22) feeding fuel (B) to a burner area (12) with a combustion chamber (16). An electrically energizable ignition element (32) ignites a fuel/air mixture formed. The method includes energizing the ignition element (32) in a preheating phase prior to the fuel feed, at a time of entry into an ignition phase, detecting electrical resistance of the ignition element (32) and determining a desired resistance based on the electrical resistance of the ignition element (32) detected and operating the ignition element (32) in a resistance-regulating operating mode during the ignition phase such that an actual resistance of the ignition element (32) is in the range of the determined desired resistance of the ignition element (32).

Abstract: A vehicle heater includes a combustion chamber assembly unit (18) to be fed with fuel and combustion air, a housing (22) with a circumferential wall (24) defining a combustion air flow space (26), a combustion air blower (30) adjoining an end face (28) of the circumferential wall (24) of the housing (12) in the direction of a housing longitudinal axis (L), a fuel feed line and a sealing formation with a first sealing formation area arranged between the end face (28) of the circumferential wall (24) and the blower housing (32). A second sealing formation area (62) is positioned to mesh with a fuel feed line passage opening (38) for establishing a closure between the circumferential wall (24) and the fuel feed line (36). The sealing formation (56) includes a sealing element (54) providing the first sealing formation area (58) and the second sealing formation area (62).

Abstract: A combustion chamber assembly unit for a fuel-operated vehicle heater includes a combustion chamber housing (14) elongated in a direction of a housing longitudinal axis (L), with a combustion chamber (16) radially outwardly bounded by a circumferential wall (18), and with a combustion chamber bottom (20) axially delimiting the combustion chamber (16). A combustion air feed volume (36) is provided that is open to the combustion chamber (16) via a plurality of passage openings (38). A cooling medium feed device (46) is provided for feeding a liquid cooling medium to the combustion air feed volume (36).

Abstract: A vehicle heater includes a burner assembly unit (12) with a combustion chamber (18) to be fed with combustion air (V) and fuel (B) and a flame tube (24). A heat exchanger assembly unit (14) includes an inner heat exchanger housing (28) with an inner circumferential wall (30) and an outer heat exchanger housing (34) with an outer circumferential wall (36). A heat transfer medium flow space (40) is between the inner and outer heat exchanger housings, which are elongated in a longitudinal axis (L) direction. A waste gas backflow space (44), between the inner circumferential wall (30) and the flame tube, opens towards an exhaust gas outlet. A catalytic converter device (52) is provided in the waste gas backflow space associated with an energizable heating unit (58), or/and insulation material (64) is provided on an outer side (62) facing away from the heat transfer medium flow space.

Abstract: A fuel-operated vehicle heater, combustion chamber assembly unit includes a combustion chamber housing (14) having a combustion chamber bottom (18) and a combustion chamber circumferential wall (16) extending in a housing longitudinal axis (L) direction to define a combustion chamber (20). A porous evaporator medium (60) is on the combustion chamber circumferential wall or/and the combustion chamber bottom, at an inner side facing the combustion chamber. A fuel feed line (62) feeds liquid fuel into the porous evaporator medium. A first combustion air feed device (68), associated with the combustion chamber bottom, feeds primary combustion air (VP) into a first combustion zone (50) at which the porous evaporator medium is arranged. A second combustion air feed device (70), following the first combustion zone in the housing longitudinal axis direction feeds secondary combustion air (VS) into the combustion chamber at an axially spaced location from the first combustion zone.

Abstract: A combustion chamber assembly unit, for a vaporizing burner, includes a combustion chamber housing with a circumferential wall extending in a direction of a combustion chamber housing longitudinal axis (L) and a bottom area (14), together defining a combustion chamber (16). The bottom area (14) includes an evaporating medium carrier (18) and on a side facing the combustion chamber (16), a porous evaporating medium (20). A first flame diaphragm (36), with a first diaphragm opening (38), is provided on the circumferential wall (12). A second flame diaphragm (40), with a second diaphragm opening (42), is provided at an axial distance to the first flame diaphragm (36) on an axial side facing away from the porous evaporating medium (20). An air admission opening arrangement (44) is provided in the circumferential wall (12) and includes an air admission opening (46) between the first flame diaphragm (36) and the second flame diaphragm (40).

Abstract: A combustion chamber assembly unit for a fuel-operated vehicle heater includes a combustion chamber housing (14) elongated in a direction of a housing longitudinal axis (L), with a combustion chamber (16) radially outwardly bounded by a circumferential wall (18), and with a combustion chamber bottom (20) axially delimiting the combustion chamber (16). A combustion air feed volume (36) is provided that is open to the combustion chamber (16) via a plurality of passage openings (38). A cooling medium feed device (46) is provided for feeding a liquid cooling medium to the combustion air feed volume (36).

Abstract: A fuel-operated vehicle heater includes a burner area (12) with a combustion chamber (14); a fuel pump (24); and a combustion air blower (28). A pressure sensor (38) detects a feed back pressure. An actuating unit (36) actuates the fuel pump (24) with a predefined value of a pump operating variable, and actuates the combustion air blower with a predefined value of a blower operating variable. A heater process includes detecting the feed back pressure in case of a feed operating state set during the combustion operation and comparing the detected feed back pressure (Pe) with an expected feed back pressure (PE) for the set feed operating state. If the detected feed back pressure deviates from the expected feed back pressure the pump operating variable is changed such that the feed back pressure changes toward the expected feed pressure and/or essentially corresponds to the expected feed back pressure.

Abstract: A vehicle heater includes a combustion chamber assembly unit (18) to be fed with fuel and combustion air, a housing (22) with a circumferential wall (24) defining a combustion air flow space (26), a combustion air blower (30) adjoining an end face (28) of the circumferential wall (24) of the housing (12) in the direction of a housing longitudinal axis (L), a fuel feed line and a sealing formation with a first sealing formation area arranged between the end face (28) of the circumferential wall (24) and the blower housing (32). A second sealing formation area (62) is positioned to mesh with a fuel feed line passage opening (38) for establishing a closure between the circumferential wall (24) and the fuel feed line (36). The sealing formation (56) includes a sealing element (54) providing the first sealing formation area (58) and the second sealing formation area (62).

Abstract: A combustion chamber assembly unit, for a vaporizing burner, includes a combustion chamber housing with a circumferential wall extending in a direction of a combustion chamber housing longitudinal axis (L) and a bottom area (14), together defining a combustion chamber (16). The bottom area (14) includes an evaporating medium carrier (18) and on a side facing the combustion chamber (16), a porous evaporating medium (20). A first flame diaphragm (36), with a first diaphragm opening (38), is provided on the circumferential wall (12). A second flame diaphragm (40), with a second diaphragm opening (42), is provided at an axial distance to the first flame diaphragm (36) on an axial side facing away from the porous evaporating medium (20). An air admission opening arrangement (44) is provided in the circumferential wall (12) and includes an air admission opening (46) between the first flame diaphragm (36) and the second flame diaphragm (40).

Abstract: A method is provided for operating a fuel-operated vehicle heater (10) during a start phase of combustion operation. The heater includes a combustion air feed device (26) feeding air and a fuel feed device (22) feeding fuel (B) to a burner area (12) with a combustion chamber (16). An electrically energizable ignition element (32) ignites a fuel/air mixture formed. The method includes energizing the ignition element (32) in a preheating phase prior to the fuel feed, at a time of entry into an ignition phase, detecting electrical resistance of the ignition element (32) and determining a desired resistance based on the electrical resistance of the ignition element (32) detected and operating the ignition element (32) in a resistance-regulating operating mode during the ignition phase such that an actual resistance of the ignition element (32) is in the range of the determined desired resistance of the ignition element (32).

Abstract: A bottom assembly unit for a vaporizing burner combustion chamber assembly unit, especially for a vehicle heater, includes a bottom part (24) with a bottom wall. A porous evaporator medium (44) at least partially covers the bottom wall on a front side (42) positioned such that it faces a combustion chamber (20). A ring-shaped holding part (34) has a contact area (40) touching the porous evaporator medium (44). The contact area has a holding section (62) extending radially inwardly from a holding part circumferential wall (36) and extends over the porous evaporator medium (44) in a radially outer area (66). A plurality of contact projections (68) are arranged at spaced locations from one another about the longitudinal axis and extend in the direction of the porous evaporator medium. The porous evaporator medium (44) is pressed by the contact projections (68) in a radially outer area (66) against the bottom wall.

Abstract: An evaporator assembly unit, especially for a vehicle heater, includes an evaporator medium carrier (12) with a bottom wall (14), a porous evaporator medium (18) provided on one side of the bottom wall (14) and an electrically excitable ignition element (34). The ignition element is embedded in the material of which the bottom wall (14) is made.

Abstract: A bottom assembly unit for a vaporizing burner combustion chamber assembly unit, especially for a vehicle heater, includes a bottom part (24) with a bottom wall. A porous evaporator medium (44) at least partially covers the bottom wall on a front side (42) positioned such that it faces a combustion chamber (20). A ring-shaped holding part (34) has a contact area (40) touching the porous evaporator medium (44). The contact area has a contact section (62) extending radially inwardly from a holding part circumferential wall (36) and extends over the porous evaporator medium (44) in a radially outer area (66). A plurality of contact projections (68) are arranged at spaced locations from one another about the longitudinal axis and extend in the direction of the porous evaporator medium. The porous evaporator medium (44) is pressed by the contact projections (68) in a radially outer area (66) against the bottom wall.

Abstract: An evaporator assembly unit, especially for a vehicle heater, includes an evaporator medium carrier (12) with a bottom wall (14), a porous evaporator medium (18) provided on one side of the bottom wall (14) and an electrically excitable ignition element (34). The ignition element is embedded in the material of which the bottom wall (14) is made.

Abstract: Swinging choke with a winding body, a core, which is integrated into the winding body such that the core forms at least one air gap in the winding body, at least one main winding which is wound onto the winding body, wherein the main winding is designed for a high voltage, and at least one ancillary winding the number of turns of which is designed such that a low voltage can be tapped and which is arranged above or close to the air gap.

Abstract: An evaporative burner, particularly for a vehicle heating device, includes a combustion chamber housing and, in the combustion chamber housing, an evaporative medium for receiving liquid fuel and for delivering fuel vapor into a combustion chamber. A heating coil arrangement is on a side of the evaporative medium remote from the combustion chamber, and an ignition region of the heating coil arrangement extends over the evaporative medium into the combustion chamber.

Abstract: A device for conditioning a vehicle includes at least one electrically operated conditioning arrangement, a hot air supply system with a heat source, and a delivery arrangement for delivery of heated air into a vehicle interior, a fuel cell system for providing electrical energy for the at least one conditioning arrangement and the delivery arrangement. The hot air supply system includes the fuel cell system as heat source and also furthermore a heat exchanger arrangement for transferring heat arising in the region of the fuel cell system to the air to be delivered into the vehicle interior.