Daimler-benz Ag

Daimler Chrysler Ag

Mercedes-benz Aktiengesellschaft

Suddeutsche Kuhlerfabrik Julius Fr. Behr Gmbh & Co Kg

Daimer-benz Aktiengesellschaft

Wolfgang Volz

Dieter Heinle

Klaus Arold

Albert Stolz

Heinz Koukal

Martin Pfeiffer

Hans Trube

Helmut Wulf

Anton Epple

Prasanta Halder

Karlheinz Witzel

Hermann Grimm

Martin Kruse

Wolfgang Weidemann

Gernot Karioth

Ottmar Supper

Helmut Merk

Gunther Sigmund

Markus Schollhorn

Heinrich Waldmann

Dieter Heile

A method and apparatus for automotive climate control includes a control unit which automatically sets the particular operating mode of the automotive climate control system according to a predeterminable region of operation for the motor vehicle or to the region in which the vehicle is currently situated. The automotive climate control system has a plurality of operating modes which can be selected by the control unit.

Method and apparatus for automatic control of motor vehicle climate control having several operating modes

A process for the outside-moisture-dependent control of an air conditioner of a motor vehicle equipped with a window wiper system provides that at least one air conditioner component is controlled as a function of a window wiper activation signal for reducing the fogging-up of the windows. The simultaneous use of such a signal, on the one hand, for the operating of window wipers and, on the other hand, as a signal for recognizing moist or wet weather by means of the air conditioner permits the automatic adjustment of an operating condition of the air conditioner by simple means. This avoids or reduces the fogging-up of the vehicle windows.

Process for the outside-moisture-dependent control of a motor vehicle

A process for operating a motor vehicle air conditioner, which contains a refrigerant circulating system with a compressor and an evaporator. The compressor is deactivated to protect against an insufficient amount of refrigerant being supplied to the compressor when the refrigerant pressure on the high-pressure side of the refrigerant circulating system falls below a definable value. The deactivation to protect against inadequate refrigerant levels is suppressed as long as the temperature of the motor vehicle engine coolant (which is utilized to heat an air flow blown by the air conditioner into the vehicle interior), is below a definable coolant temperature deactivation threshold value and the evaporator temperature is above a definable first evaporator temperature deactivation threshold value. The process can also be used to reduce the tendency of the vehicle's windows to fog up.

Process for operating a motor vehicle air conditioner having a

A vehicle body, in particular for passenger cars, with an opening, which extends over the entire width of the body between the windshield and the rear edge of the engine hood and is divided into a water-inlet region with a water channel arranged underneath it for the water running off the windshield, and into an air-inlet region for an air-supply device for the passenger cell. To prevent alcohol fumes from the washing water sprayed onto the windshield from being drawn in via the air-inlet region, the latter is formed by the inlet of an air-water channel, which is closed on all sides, has a connection for the air-supply device and is secured in the engine compartment at such a distance from the windshield that it bounds a wiper recess, which lies toward the windshield and the recess opening of which constitutes the water-inlet region and the recess bottom of which forms the water channel. Washer jets are arranged on the upper edge of the channel wall, bounding the wiper recess, of the air-water channel.

Vehicle body

An air-conditioning system for motor vehicles having an evaporator and a heat exchanger arranged successively in the air flow. A separate air duct having an air outlet opening for the central jet, is connected on the one hand via a cold-air opening to an air-chamber upstream of the heat exchanger and, on the other hand, via a hot-air opening to an air chamber downstream of the heat exchanger. The cross-section of the bypass openings can be controlled by bypass flaps which are coupled with actuators. A control unit with stored characteristics is provided which indicate the correlation between the air quantity and air temperature of the air issuing at the central jet and the position of the bypass flaps. The control unit applies actuation values to the actuators, which actuation values effect a setting of the bypass flaps redetermined by characteristics for a preselected air quantity and air temperature.

Air-conditioning system for motor vehicles

In a filter insert which is received exchangeably in a shaft along a channel and which can be fixed sealingly relative to frame shaped shaft walls via at least one gasket preferably continuous on a flow-off side of the filter, it becomes possible to change the filter easily, without the danger of damaging the gasket, if there is at least one pressing element which can be connected to a pressure reducing device. When the pressing element is in the contracted pressure reduced position, a continuous gap forms between the gasket and associated shaft wall during a shift of the filter, this gap being cancelled when the pressure reducing device is disconnected.

Filter insert received exchangeably by a shaft along a channel

In a heating/air conditioning system for a motor vehicle, with an exchangeable and selectively bypassable absorption filter which is arranged in a channel shaped housing and through which fresh air and/or circulating air can flow, a high degree of absorption is achieved when unprocessed air passing through internal leakage points at the absorption filter holder and the shut off bypass line of the absorption filter is collected and conveyed, via at least one line, to a location which is separated from the passenger space and the pressure level of which is lower than the pressure level on the flow off side of the absorption filter. Untreated air, which in certain circumstances escapes through external leakage points of a housing partition, is guided outside the passenger space, at the same time being prevented from overflowing into the latter.

Heating/air conditioning system for a motor vehicle with absorption

A process and processor for an air conditioning system in which, in addition to the values recorded for the interior temperature, the outside air temperature, the temperature after the evaporator and the ventilation temperature after the heating element, the value recorded by a further sensor of the relative humidity of the outside air for controlling the relative humidity of the interior air are supplied to an evaluation unit and correspondingly further processed.

Process and processor for the control of parameters of the interior air

In order to bring about, in the case of a crossflow heat exchanger with two heating sections which can be individually regulated through the heat transfer medium, a pipe routing adapted to the particular installation conditions in a motor vehicle, with minimum possible connections, the partition wall subdividing a central deflection header is provided with perforations further dividing both regions of the deviation zone for the heat transfer medium, for a purposeful routing of the heat transfer medium through integrated flow and return tubes from an outer deflection header to the respective opposite heating section. Only one flow pipe is connected to an outer deflection header and the two return pipes lead away from the same outer deflection header mutually separately for the heat transfer medium.

Vehicle crossflow heat exchanger

A regulating device of a heating system having a divided heat exchanger is provided in which the duration of opening of the throttle valves is determined in dependence of the number of throttle valves simultaneously opened and in accordance with the heat requirement. As a result, temperature fluctuations are avoided when different heat requirements exist.

Regulating device of a multi-channel heating system for a vehicle

A motor vehicle heat exchanger for independently heating different passenger areas comprising first and second tube/fin block units for transferring heat from coolant flowing through tubes thereof to air flowing therethrough to first and second passenger areas, respectively. Common upper and lower coolant reservoir tanks supply coolant to both tube/fin units and receive coolant returning therefrom respectively. Intake tubes extend through a common gap between the first and second tube/fin units to supply heated coolant to the lower cooling tank.

Passenger vehicle heat exchanger arrangement

A thermometer is provided which is insertable between two lamella of a heat exchanger. The thermometer exhibits a double channeled insulated pipe or tube for receiving the uninsulated leads which are connected to a temperature sensitive resistance at a supporting connection with a cap surrounding a heat conducting mass. The other end of the double channeled tube is inserted into a connector device which in turn leads to a relieved connecting cable.

Rod shaped thermometer and method of making same

A device for regulating the heat output or heat capacity of a heat exchanger in an automotive vehicle with an actuating member to control the flow of a heat exchange medium and with a control device operating the actuating member. To provide input to the control device, signals are received from a highly rated internal temperature sensor and a lower rated heating air temperature sensor disposed at the outlet of the heat exchanger as well as a manually adjustable set point generator. The control device includes a pulse generator producing a triangular voltage of a constant frequency, with a differential amplifier for the signals of the temperature sensors as well as the set point generator. A comparator is provided for producing rectangular pulses in correspondence with the triangular voltage frequency, with a pulse width corresponding to the temperature signal of the differential amplifier. The heat exchanger is tubular and has a large ratio of heat exchange medium volume to heat dissipating surface area. The actuating member is formed as a solenoid valve which is in an open position when the electromagnet of the valve is unenergized. The valve is arranged downstream of the heat exchanger.

Device for regulating heating capacity of a heat exchanger

A heating system for motor vehicles with a heat-exchanger that is connected to the cooling system of the internal combustion engine; at least one heat conductor adapted to be acted upon by the exhaust system terminates in the flow path of the cooling water upstream of the heat-exchanger for the heating system.

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Magstadt, Germany

Wolfgang Volz