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6 Installation Instruction
Rev. 06/2021
51
SCR catalytic converter: No monitoring in accordance with VDMA
6299:2019-09
The NO
X
monitor of the EasyNO
ₓ
does not evaluate the dosing release of the
urea solution in an SCR catalytic converter. Thus, the NO
X
monitor of the
EasyNO
ₓ
is not suited for monitoring SCR catalytic converters in accordance
with the standard sheet VDMA 6299:2019-09.
The following sections describe the mounting of the sensing element of the NO
X
sensor from the
CAN bus/NO
X
sensor module.
6.4.1
Mounting Position of Sensing Element
The possible mounting positions of the sensing element depend on the catalytic converter type
used:
–
Oxidizing catalytic converter: Select a suitable position between the exhaust gas turbo-
charger and the exhaust gas heat exchanger before or after the catalytic converter. For
engines with two catalytic converters in split exhaust gas lines, select a suitable position
before or after the split exhaust gas lines.
–
SCR catalytic converter: Select a suitable position after the catalytic converter.
Ensure that there is a sufficient distance between the sensing element and the exhaust gas
turbocharger. Normally this distance should be at least 1 meter (3.3').
The NO
X
sensor is only suited for measurement when mounted in an exhaust pipe.
The mounting position of the sensing element must be defined in such a way that no condensa-
tion water is able to collect in the protective tube of the sensing element.
A pipe connected to the exhaust system (e.g. for changing the gas mass flow or gas pressure)
must not be located in the environment of the sensing element.
If the intake pipe is located near the sensing element, the distance between the sensing element
and the intake pipe must be chosen in a way that condensed liquid droplets will not stream back
to the sensing element due to gas pulsation.
In systems with urea injection, if the sensing element is to be mounted near the injection point,
the sensing element should be mounted prior to the injection point and it should be ensured
that no urea flows back to the sensing element.
When mounting the sensing element after the catalytic converter, make sure that no material es-
capes from the catalytic converter.
The possible tilt angles of the sensing element depend on the course of the exhaust pipe.
Mounting in a vertical exhaust pipe is not recommended by MOTORTECH.
Содержание EasyNOx
Страница 1: ...EasyNOX NOX Monitoring Operating Manual P N 01 50 026 EN Rev 06 2021 ...
Страница 33: ...4 Product Description Rev 06 2021 33 4 1 7 Overview Drawings 4 1 7 1 Dimensions EasyNOX ...
Страница 34: ...4 Product Description 34 Rev 06 2021 ...
Страница 35: ...4 Product Description Rev 06 2021 35 CAN Bus NOX Sensor Module P N 63 05 015 ...
Страница 36: ...4 Product Description 36 Rev 06 2021 I O Communication Module Optional ...
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