Abstract: A blower housing, especially for a combustion air blower of a vehicle heater, includes a first housing area (14) with a delivery channel, which extends in a ring-shaped manner around a housing axis (A) and is open on an axial side, and a second housing area (16) for accommodating a blower motor (20). The second housing area (16) includes a housing wall (18), which is elongated in the direction of the housing axis (A) and surrounds a space accommodating the motor. A connection area (26) is provided in a central longitudinal area of the housing wall (18) in the direction of the housing axis (A) on an outer side of the housing wall (18) for establishing an electric connection with an actuating device (38).

Abstract: A blower housing, especially for a combustion air blower of a vehicle heater, includes a first housing area (14) with a delivery channel, which extends in a ring-shaped manner around a housing axis (A) and is open on an axial side, and a second housing area (16) for accommodating a blower motor (20). The second housing area (16) includes a housing wall (18), which is elongated in the direction of the housing axis (A) and surrounds a space accommodating the motor. A connection area (26) is provided in a central longitudinal area of the housing wall (18) in the direction of the housing axis (A) on an outer side of the housing wall (18) for establishing an electric connection with an actuating device (38).

Abstract: The invention relates to an on-board or off-board diagnostic device (1) enabling a vehicle manufacturer or the like (“clients”) to carry out a client diagnosis (N) or to monitor a motor vehicle sub-system (2) manufactured by a special supplier, using the vehicles's data collection line (3) or data bus and comprising an electronic control device allocated to said sub-system (2) which is connected to an operating unit (5) for instance, by means of a line (HS). According to the invention, a specially coded signal (S) is fed into the electronic control device (4) in order to switch from client diagnosis mode (N) to special supplier diagnosis mode (U) so as to provide extended or modified sub-system (2) data on an already existing line (HS).

Abstract: A burner for a vehicle heater of a particle filter regenerator including a combustion air blower, a combustion chamber with a fuel evaporator, a fuel supply with a fuel metering pump by which the fuel is proportionately fed to the evaporator, a glow-plug to ignite a mixture of combustion air and vaporized fuel and a control device, in which the control device switches the flow-plug on to ignite the mixture, starts the fuel metering pump after a first period following the switch-on of the glow-plug and substantially simultaneously with the starting of the fuel metering pump or a second period thereafter initiates a gradual increase in the speed of the combustion gas blower from a standstill or low speed rotation.

Abstract: A vehicle heater with a burner, a fan for the combustion air to be fed to the burner, a heat exchanger for heating the engines's cooling water, which is circulated in a closed circuit, and with a control device. A basic housing is provided substantially in the form of one of a parallelepiped and a semicylinder with an essentially flat, continuous upper housing surface. The basic housing is axially divided into a first housing end section, which is located at a first end and accommodates the burner and the heat exchanger, a middle housing part containing the fan, as well as a second housing end section comprising the control device. The inlet and outlet connections of the heat exchanger as well as a connecting branch for fuel to be fed to the burner are located within the upper surface of the basic housing.

Abstract: A glow pin control circuit for controlling the electrical heating energy of a glow pin, in particular for auxiliary heating apparatus in vehicles. The control circuit including a switch that alternatingly turns on and off the supply voltage in modulated and clocked manner and is situated between the supply voltage terminal (V+) on the high potential side. The glow pin (G) may be designed without a regulating filament.

Abstract: In a vehicle heating appliance, an overhead state is detected by an overheating temperature sensor by means of a microprocessor. The overheating temperature sensor supplies a signal (UTF) to the microprocessor, and when the signal (UTF) exceeds a threshold value, the microprocessor blocks the transmission of driving signals to a driving transistor (Tr) for the fuel dosing pump. A circuit connected in parallel to the microprocessor with a threshold value switch acts as a redundant switching-off device. The output signal of the threshold value switch is applied to an AND-gate whose output is connected to the base of the driving transistor (Tr) and whose other input receives the driving signals from the microprocessor. When the signal UFT exceeds the threshold value of the threshold switch, the AND-gate blocks all signal transmission from the microprocessor to the driving transistor, so that the fuel dosing pump is stopped.

Abstract: The vehicle heater described has a burner supplied from a tank through a fuel line to which a pressure-controlled fuel pump (2) and a solenoid valve (24) are connected. The solenoid valve offers a relatively high resistance to the flow of fuel. The pressure in the pump delivery line thus drops relatively slowly. If vapor/gas forms in the fuel line (L2, L3, L4) due to overheating, it must be driven out of the line as rapidly as possible when the heater is switched on. The solenoid valve (24) offers only a low resistance to air/vapor/gas, resulting in a rapid drop in pressure at the pump delivery outlet and hence an increase in pump frequency (i.e. pump performance). The gas is therefore driven very rapidly out of the line between the pump and the burner, thus avoiding any interruptions in operations due to gas/vapor which has collected in the fuel line.

Abstract: A method and a device for determining the load condition of a particle filter (10) used in the exhaust gas system (11) of a diesel engine (12) employed in particular in a motor vehicle, whereina pressure value (.DELTA.P.sub.filter, P.sub.abs.pre-filter or P.sub.rel.pre-filter) and a temperature value (t.sub.m,filter of the exhaust gas volume flow in the particle filter (12) are measured;the engine speed (n) proportional to the volume flow is measured;an actual characterizing value is calculated considering these measurement values; anda comparison between actual characteristic value (IK) and limit characteristic value (GK) is performed for initiating a regeneration process when the difference (DI) is sufficiently small.