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описание работы датчика давления наддува и температуры входящего воздуха DAF XF105
INLET AIR BOOST PRESSURE AND TEMPERATURE SENSOR This is a combined sensor that measures the air pressure in the inlet manifold and the temperature of this air. The electronic unit uses this data to calculate the quantity of air drawn in. The quantity of intake air needs to be known in order to calculate the quantity of injected fuel to prevent smoke. The charge pressure is also in a direct relationship to the turbocharger pressure control. The waste gate valve is actuated depending on this signal.
1 Air inlet pressure sensor, piezo-resistive 2 Electrical connection 3 Air inlet temperature sensor, NTC 4 Air inlet opening 5 O-ring 6 Accommodation
The charge temperature sensor (3) used is of the NTC (negative temperature coefficient) type. The higher the temperature, the lower the resistance of the sensor. The charge pressure sensor (1) is a piezoresistive sensor. The inlet air is measured via an opening (4) in the sensor. The higher the pressure, the higher the voltage signal. The sensor is sealed in the installation hole in the cylinder head by an O-ring (5).
The temperature signal is fed back to the electronic unit via a connection (2). A piezoresistive sensor requires a power supply (3) and earth (1) to create a linear voltage signal (4).
Effect of temperature signal on the system: - calculation of glowing time; - correction on the waste gate control; - correction on the smoke limiting system. Effect of pressure signal on the system: - calculation for smoke limiting; - calculation of the waste gate control; - protection of turbocharger; - CAN message to VIC for the charge boost pressure display on the main display of the DIP. остальной материал по ремонту DAF DAF 95 XF электрическая схема
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