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The PTC heater can be adapted to the requirements of any vehicle model and used as a de-central system, too; e.g. as head-space heating system in a convertible located in the headrest. Serial production of high-voltage heating systems (up to 500 V, up to 7 kW) for hybrid, electrical and fuel-cell vehicles is located in Germany ( Herxheim , Pfalz).
The South Wind Heater was invented by Canadian Harry J. McCollum, [1] who demonstrated his invention to the Stewart-Warner company in 1934. Production at the Chicago firm began a short time later, [ 2 ] with more than 3 million units installed in automobiles, aircraft, and military vehicles by 1948. [ 1 ]
Where a blend door is used instead of a control valve as a method of controlling the air's heating amount, the door itself or its control mechanism can become stuck due to thermal expansion. If the climate control unit is automatic, actuators can also fail. Another possible problem is a leak in one of the connections to the heater core.
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...
An early automotive use was the "head bolt heater", invented by Andrew Freeman in the United States and patented on 8 November 1949. [ 1 ] [ 12 ] [ 13 ] These early heaters replaced one of the engine's head bolts with a hollow, threaded shank containing a resistive heating element.
2nd Class (5 May 1941) [13] 1st Class (5 August 1941) [13] Honour Goblet of the Luftwaffe on 17 April 1944 as Oberleutnant and pilot [14] [Note 2] German Cross in Gold on 1 January 1945 as Hauptmann in the I./Schnellkampfgeschwader 10 [15] Knight's Cross of the Iron Cross on 26 January 1945 as Hauptmann and Staffelkapitän of the 3 ...
The crankcase heater keeps refrigerant at a temperature higher than the coldest part of the system. A crankcase heater generally has the same electrical symbol as a resistor because it converts electricity directly into heat via electrical resistance. The resistance in the heater coil determines the heat it produces when voltage is applied. [1]
AAR control stand on an EMD DDA40X; Other EMD models are similar. A control stand is a diesel-electric locomotive subsystem which integrates engine functional controls and brake functional controls, [1] whereby all functional controls are "at hand" (within reach of the locomotive engineer from their customary seating position, facing forward at all times). [2]
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