Gas system main parts
technical & installation requirements
1.
Pressure reducer
Installation
requirements
● Pressure reducer is a supplied accessory and
shall be mounted in places with little vibration and near to the engine with
distance not exceeding 2m.
● It shall be installed behind the filter and
installation position shall be convenient for regular adjustment, inspection
and maintenance of pressure reducer.
● Pipeline connecting to pressure reducer shall be
reasonably arranged and free from interferences.
● Pressure reducer gas outlet and the bottom shall
not be upward to prevent fuel gas greasy dirt from back flowing into pressure
reducer.
● Screw off the top cap and adjust the screw to
pressure reducer valve, turn clockwise to thicken and anticlockwise to thin
(Note: such mode of regulation is only applicable to high speed regulation).
2.
Low pressure gas filter
Installation
requirements:
● Gas filter installation position must be
convenient for repair, cleaning and replacement;
● Within filter service life, pressure drop shall
be less than 20kPa to guarantee system performance.
● Pay attention to arrow pointed airflow
direction during installation
3.
Mixer
Technical parameters: 1.
Fuel type: natural gas, LPG, methane
2. Inlet pressure:
-0.37kPa 3.Working temperature: —40℃~121℃
Installation
requirements and operating instructions:
● Vertical installation
● Pay attention to arrow pointed airflow direction
during installation
4.
Wiring harness
Installation
requirements:
● Wiring harness is not allowed to be laid at
exhaust pipe side to avoid high temperature damage. Wiring harness is more than
150mm away from exhaust pipe and vortex end of turbocharger;
● Wiring harness shall be fixed reliably to
prevent interference or friction with sharp matters. If not, please take
protective measures.
● Wiring harness shall be free from intertwining
and overlapping and reasonably aligned, convenient for later maintenance.
5.
Engine control unit (ECU)
ECU collects inlet
manifold pressure (MAP), inlet manifold temperature (MAT), engine phase,
revolving speed, outlet water temperature, exhaust oxygen concentration and
other signals and controls the action of electronic throttle, ignition timing
and ignition orders after calculation so as to accomplish electronic control of
engine. Engine control unit (ECU) shall be installed in control panel to
realize real-time monitoring of engine parameters.
6.
Inlet temperature, pressure sensor (T/MAP)
T/MAP sensor integrates
pressure and temperature measurement. Engine control unit (ECU) uses sensor
signals to calculate engine’s mixture air input.
7.
Revolving speed sensor
Revolving speed sensor
is mainly used to measure engine’s revolving speed. Engine control unit (ECU)
uses revolving speed to control many parameters, including air input, ignition
advance angle, etc. Control requirements of these parameters need engine
control unit (ECU) to know engine’s camshaft position (for example which
cylinder is ignited) and revolving speed.
8.
Water temperature sensor
Water temperature sensor
is mainly used to measure cooling water temperature. ECU may regulate idle
speed and ignition advance angle in different water temperatures according to
ECU stored data.
9.
Oxygen sensor (UEGO)
Oxygen sensor is used to measure oxygen
concentration in exhaust gas and transfer it into electrical signal for the use
of ECU so as to monitor engine’s air-fuel
ratio.
Installation
requirements
● Installation position of oxygen sensor plays an
important part in system’s work
accuracy, so it must be installed strictly in accordance with specific
requirements.
● It shall be installed 3～5 times of exhaust pipe
diameter away from downstream of turbocharger outlet or exhaust elbow;
● It cannot be installed on exhaust elbow;
● In order to prevent oxygen sensor from being
burned on exhaust pipe and for the convenience of disassembly, thread shall be
smeared with anti-burning glue during the installation of oxygen sensor;
● Oxygen sensor wiring harness and connectors
shall be kept away from exhaust pipe to avoid caking;
Height of oxygen sensor
screw seat welded on exhaust pipe shall be less than 10mm and length of oxygen
probe in exhaust pipe shall not be less than 13mm;
● Large gas consumption and unstable revolving
speed occur when sensor is in failure or wiring hardness and connector is in
bad contact;
● Oxygen sensor shall be installed on the exhaust
pipe (circumferential), facing away from the engine;
● Oxygen sensor satisfying above mentioned
conditions shall be close to turbocharger.
10.
Revolving speed sensor
Revolving speed sensor
is mainly used to measure engine’s revolving speed. Engine control unit (ECU)
uses revolving speed to control many parameters, including air input, amount of
fuel, ignition advance angle, etc. Control requirements of these parameters
request the engine control unit (ECU) to know engine’s camshaft position (for
example which cylinder is ignited) and revolving speed
Technical parameters:
1.Normal working
temperature: measuring terminal: -40℃～150℃; plugging terminal: -40℃～ 120℃;
2. All magnetic field
allowable: ≤2KA/m
3. Maximum torque
allowable shall be 8N•m during assemble (when 8.8 M6X12 bolts are used),
installation gap shall be 0.5~1.5mm.
We can provide Yuchai natural gas generator. More information, please contact us: sales@dieselgeneratortech.com
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