Section 3.7
Quantity Control Valve
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1. Float Needle |
4. Valve Spring |
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2. Quantity Control Valve |
5. High Pressure Pump |
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3. Coil |
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The quantity control valve (2) is located on the fuel high pressure pump (5). The quantity control valve has the following tasks:
- Regulation of the fuel feed to the high pressure fuel pump (5)
- Regulation of the rail pressure
The MCM actuates the coil (3) of the quantity control valve (Y134) using a pulse width modulated signal. The magnetic field of the coil (3) influences the position of the float needle (1) and thus the flow in the quantity control valve (2). At engine off the float needle (13) is pushed back by the valve spring (4) and the fuel flow is interrupted.
| DD15 Fuel System Technician's Guide - DDC-SVC-MAN-0037 |
| Generated on 10-13-2008 |