Yaroslavl Engine Plant YMZ-536, Руководство по эксплуатации

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CRS BOSCH with an electronic control unit ensures the following:

precise fuel injection rate for each operation mode as well as
multi-stage injection;

fuel injection advance angle control depending on the rpm,
load and temperature;

flexible control of fuel injection pressure over a wide range;

easy engine start-up with minimum exhaust emissions under
any temperature conditions;

adjustment of fuel supply depending on the environmental
conditions in order to reduce harmful engine emissions;

compatibility with the vehicle’s electronic systems and
onboard diagnostic and monitoring system through the CAN bus;
ensures diagnostics performs speed limiting and engine emergency
protection functions, as well as cruise-control and redundant control
from the operator’s control panel by means of a supplementary
controller.
Fig. 30. Main components of Common Rail System
The fuel system operates as follows (Fig. 30, 31): the fuel from
the fuel tank through the coarse fuel filter and the ECU cooler
12
is
drawn by the priming gear pump
6
and supplied under the pressure of
700…800 kPa (7…8 kgf/cm
2
) to the fine fuel filter
1
featuring a very
high filtering capacity as the Common Rail System is more sensitive
to contamination than systems with a standard plunger-type fuel
pump. Then the fuel enters the high-pressure fuel pump
11
which has