Supply Pump - wsm M7060 Workshop Manual

M6060, M7060, WSM

[2] SUPPLY PUMP

The supply pump is equivalent to previously used
injection pumps and it delivers fuel to the rail at a
pressure more than double that of previous pumps.
It consists of a feed pump (10), regulating valve (6),
SCV (suction control valve) (2), pump unit, delivery valve
(3) and a fuel temperature sensor (1).
(1) Fuel Temperature Sensor
(2) SCV (Suction Control Valve)
(3) Delivery Valve
(4) Plunger
(5) Suction Valve
Feed Pump
The feed pump sucks up fuel filtered by the fuel filter
and supplies it to the pump unit.
The feed pump is a trochoid pump with an inner rotor
and outer rotor (1) geared elliptically; the inner rotor (3)
is driven by the drive shaft (2) and drives the outer rotor
in turn in the same direction. In the process, the volume
of the part enclosed by the teeth of the rotor changes and
thus pumps the fuel.
(1) Outer Rotor
(2) Drive Shaft
(3) Inner Rotor
Regulating Valve
The regulating valve controls the fuel feed pressure
(feed pump discharge pressure) so it always stays at the
set pressure.
When the feed pressure exceeds the set pressure
due to changes in the pump's RPM, the piston (4)
overcomes the pressure of the spring, opening the valve
and returning fuel to the suction side of the feed pump
(2).
(1) Pump Housing
(2) Feed Pump
(3) Bushing
1-M11
ENGINE
(6) Regulating Valve
(7) Drive Shaft
(8) Eccentric Cam
(9) Ring Cam
(10) Feed Pump
9Y1210828ENM0016US0
A: Suction Port
B: From The Fuel Tank
C: Discharge Port
D: To Pump Chamber
9Y1210828ENM0017US0
(4) Piston
(5) Spring
(6) Plug
9Y1210828ENM0018US0
KiSC issued 08, 2013 A