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66 | EPS 118 | Product description
Return adapter CRIN with threaded connection
(screw connection M8x1)
The return adapter connects the CRIN with a threaded
connection to the test connection for the return quan-
tity (Fig. 3, item 3) on the EPS 118. The hose assembly
1 684 462 570 (Fig. 9, item 1) and Bosch CRIN hose
fitting 1 683 386 192 (Fig. 9, item 4) are needed for
connecting to the test connection for the return quan-
tity (Fig. 3, item 3).
1
Fig. 25:
Return adapter with threaded connection
1 Return adapter
Initial commissioning
4
3
5
Fig. 26:
Fitting return adapter
1. Screw the plug-in nipple (Fig. 26, item 1) with flat
sealing ring (10.2 x 13.4 mm) into the distributor
head (Fig. 26, item 2) and secure.
2. Screw the hose fitting (Fig. 26, item 3) with flat
sealing ring (10.2 x 13.4 mm) into the end face of
the distributor head and secure.
3. Attach both hose assemblies (Fig. 26, item 4) to
the hose fittings and secure with two screw clamps
(Fig. 26, item 5).
4. Fit the other two screw clamps on the other end of
the hose assemblies.
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1 689 989 300
2020-03-24
1
2
3
4
5
3
Fig. 27:
Installing the return adapter with threaded connection
5. Screw the plug-in hose nipple (Fig. 27, item 1) and
adapter (Fig. 27, item 3) together with flat sealing
ring 10.2 x 13.4 mm (Fig. 27, item 2) and tighten.
5.5
Functional description
EPS 118 is designed as a compact unit. It contains all
components needed for testing a CRI/CRIN and piezo
CRI, such as a high-pressure pump for pressure gene-
ration, test oil tank, quantity meter, measuring circuit
board, computer circuit board and LCD display with
touchscreen. Use is made of a high-pressure pump and
a high-pressure rail to build up the pressure needed
for test purposes. The high-pressure pump conveys
the test oil, while the high-pressure rail with a pres-
sure control valve controls the pressure required for
testing. The CRI/CRIN and piezo CRI are connected by
way of a high-pressure hose assembly and a connec-
tion adapter. The CRI/CRIN and piezo CRI are cont-
rolled by means of electrical injector-specific adapter
cables.
The CRI/CRIN and piezo CRI can only be tested with
the protective hood closed. The safety circuit of the
protective hood immediately interrupts the test to win
the protective hood is opened and reduces the test oil
pressure to <8 MPa (80 bar).
The illumination of the inside of the injection chamber
allows the spray pattern to be assessed. The EPS 118
software allows the most important functions to be
checked. The leak test, injected fuel quantity and re-
turn quantity are measured at different load points to
provide a picture of the injector status.
Robert Bosch GmbH
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