Bosch EPS 205 - 5.4.5 CRI Piezo test procedure

1 689 989 185 2018-03-24| Robert Bosch GmbH
Operation | EPS 205 | 61 en
5.4.5 CRI Piezo test procedure
DANGER – Risk of fatal injury from
electromagnetic fields
The high voltages at the CRI Piezo (charging
of the actuators) and at the adapter cables
are a source of potential fatal injury for
persons wearing pace-makers.
¶ Anyone wearing a pace-maker is not
allowed to perform "Common Rail Injector
(CRI Piezo)" testing.
! Do not check any damaged and/or severely corroded
components.
458881-273_Ko
Fig. 41: Block diagram of CRI Piezo connection
1 CRI Piezo return inlet
2 CRI Piezo return outlet
3 Test connection for return quantity and adapter with check valve
4 Test connection for injected fuel quantity with inlet filter
5 CRI Piezo socket
6 Injection chamber
7 CRI Piezo
8 Connection adapter
9 High-pressure hose
i Use is to be made of the accessory set
1 687 010 400 (special accessory) for non-Bosch
injectors.
i The prerequisites to be observed when checking
and adjusting CRI Piezo can be found in the test
instructions for CRI Piezo in ESI[tronic] 2.0. These
test instructions do not form part of the scope of
delivery. ESI[tronic] 2.0 can not be installed on the
EPS 205.
Procedure:
1. Clean the CRI Piezo (see Sec. 5.3).
i Perform the "leak test" before fitting the injection
chamber (Fig. 41, item 6) on the component.
2. Attach the CRI Piezo (Fig. 41, item 7) to the clamp
(Fig.3, item 3).
! To avoid twisting and premature wear, do not
connect the high-pressure hose directly to the
CRIPiezo.
3. Connect the high-pressure hose with the connection
adapter (Fig. 41, item 8, 9) to the CRI Piezo.
! The connection adapter must be tightened to
a torque of between 25 Nm and 30 Nm. If the
connection between the connection adapter and the
CRI Piezo is leaking, the screw connection is not to
be re-tightened. In the event of a leak, unfasten the
connection again, clean the sealing surface and re-
connect the connection adapter applying the correct
tightening torque.
4. Connect the hose 1 680 703 078 to the return of
the CRI Piezo and to the "CRI Piezo return inlet"
(Fig. 41, item 1).
5. With a Bosch piezo CRI, plug the adapter with check
valve into the "test connection for return quantity"
(fig. 41, item 3).
! Do not use the adapter with check valve with third-
party piezo CRIs.
6. Connect the hose assembly 1680703079 to the
"piezo CRI return outlet" (fig. 41, item 2) and the
adapter with check valve or, with a third-party piezo
CRI, to the "test connection for return quantity"
(fig.41, item 3) of the EPS 205.
7. Connect the injector-specific adapter cable
(1684465669, 1684465671) to the CRI Piezo
and to the "Socket" (Fig. 41, item 5).
! Route the injector-specific adapter cable such that it
does not come into contact with the hot hoses.