SUPPLY PUMP CONSTRUCTION [MZR-CD (RF Turbo)]
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• The pump is composed of: a feed pump that siphons fuel from the fuel tank into the supply pump, a suction control valve that controls the intake amount of fuel to the pump chamber, a delivery valve that pressure feeds fuel to the common rail, and a pump body.
• The pump body is composed of a camshaft, outer cam and plunger.
• The pump is driven by the engine. A pulley on the front end of the pump is connected to the crankshaft via a belt, thus engine torque is transmitted to the outer cam.
• Two plungers are attached in opposing pairs on the outside of the outer cam. One is used for the intake stroke and the other is for the pressure feed stroke.
• The regulator valve regulates the fuel pressure within the pump and returns fuel to the fuel tank.
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1
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Fuel tank
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2
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Fuel filter
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3
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Feed pump
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4
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Regulator valve
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5
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Suction control valve
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6
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Plunger
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7
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Inflow orifice
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8
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Outflow orifice
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9
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Common rail
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10
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Fuel injector
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11
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Camshaft
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12
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Main fuel flow
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13
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Return fuel flow
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