Warm Up Regulator

Posted by Janell A. Bueno in Warm
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Warm Up Regulator

Warm Up Regulator -
Iurn it dockwise to ridhem up the mixture, and counterdodowise to leunit out. Make sure that you have the exhaust Another common problem is the warmup regulator (WUR), or control pressure regulator. Contrary to popular belief, the WUR restrictors to the warmup regulator, which is a valve that maintains the control pressure at a constant 3.7 bar once the engine is warm. During warmup, however, this regulator reduces the pressure to as low as 0.5 bar, so that the control Warmup regulator in the Bosch KJetronic [4.22] degree depending on the engine temperature, which causes the metering slit to open further. Fig. 4.148 shows warmup regulator operation when the engine is cold and when it has reached its 1⁄4 Warmup enrichment:

Mixture.control for warmup operation is effected via the control pressure by the warmup regulator (controlpressure regulator). When the engine is cold, the warmup regulator re duces the control pressure to a This enrichment is controlled as a function of temperature by the warmup regulator. As the temperature increases, the warmup regulator commands less and less additional fuel by increasing the control pressure. For acceleration response Warmup regulator a With the engine cold, b With the engine at operating temperature. 1 Valve diaphragm, 2 Return, 3 Control pressure (from the mixture control unit), 4 Valve spring, 5 Bimetal spring, 6 Electrical heating. Warmup enrichment When the engine is cold, the warmup regulator

reduces.control pressure, causing the metering slits in the fuel distributor to open further. This enrichment process prevents combustion miss during the warmup phase of engine operation and is It consists, essentially, of the following functional components, through which air flows continuously: A highpressure air source, a lowtemperature drying system, a filtering system, a warmup unit, a pressure regulator, a humidifying system, the control pressure regulator was warm up regulator (WUR). The control pressure/warm up regulator is supplied with fuel from the fuel distributor; a second fuel line leads from the regulator back to the tank. Within the regulator, a flexible metal Cold start valve showing Oring and fuel line

TESTING.WARMUP SENSOR— 2002TH NOTE: The warmup sensor adjustment must be made before the engine is warmed up. 1 . Remove the air filter housing. 2. Press out the air regulator cone