Operation Section
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38
Delivery Valve
• The delivery valve for the HP3 has an integrated element and is made up of the check ball, spring, and holder. When
the pressure at the plunger exceeds the pressure in the rail, the check ball opens to discharge the fuel.
Fuel Temperature Sensor
• The fuel temperature sensor is installed on the fuel intake side and utilizes the characteristics of a thermistor in which
the electric resistance changes with the temperature in order to detect the fuel temperature.
Element
Check Ball
Spring
Holder
Plunger
Q000847E
Resistance - Temperature
Characteristic
Temperature
Resistance Value
Thermistor
Q000848E
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