ECM egrCAN Скачать руководство пользователя страница 23 | Manualshive

Страница: 23 / 52

ECM egrCAN Скачать руководство пользователя страница 23

19

When the NOx sensor is off (i.e. cold) and is stored for a period longer than a few days, the

sensor may adsorb water vapor. This results in a NOx measurement error until the water is

boiled off the sensor. When the sensor is used in an engine, this will occur quickly.

However, if the sensor is held in air or is mounted in a cold pipe with slow moving gases, it

may take up to eight hours for the water to boil off.

To minimize above-described effects, it is strongly recommended that the NOx zero and

span be performed with the NOx sensor mounted in the exhaust of a running engine and in

comparison to a CLA (chemiluminescence) NOx analyzer. It is not recommended that the

NOx sensor be calibrated using the CLA’s zero and span gases (i.e. “model gases”) because

the NOx sensor will be mounted in a cold tube during this calibration and water vapor will

not be present in suitable quantities in the calibration gases.

Therefore, the recommended calibration procedure for the NTK NOx sensor is:

1.

Hold the powered NOx sensor and pressure sensor (if so equipped) in air for eight

hours. This is to remove any adsorbed water. Pressure information is required if the

calibration is to be pressure compensated.

2.

“Span O2” the sensor in a manner similar to the Lambda sensor.

3.

“Zero NOx” the sensor in a running engine and in comparison to a NOx CLA. The

NOx level doesn’t have to be exactly zero for the zero process. For example, if it is

12 ppm, the Configuration Software will allow this.

4.

“Span NOx” the sensor in a running engine and in comparison to a CLA. Span at the

upper range of NOx to be measured.

If a CLA is not available, the back-up calibration procedure for the NTK NOx sensor is:

1.

Hold the powered sensor in air for eight hours. This is to remove any adsorbed water.

2.

“Span O2” the sensor in a manner similar to the Lambda sensor.

3.

“Zero NOx” the sensor while it is attached to a BTU200 or in a tube heated to the

temperature of the exhaust pipe the sensor will be used in. For general-purpose use,

zero the sensor in gases containing approximately 20% O2 (balance N2).

IMPORTANT NOTE

: Do not zero in pure N2 or N2 bubbled through water! This

damages the sensor.

4.

“SPAN NOx” the sensor in the same heated condition as the “Zero NOx” using a

NOx + O2 + N2 span gas that has been bubbled through water. Correct the span NOx

ppm content of the gas using the formula:

NOx (corrected) = NOx (in tank) x ((%O2 in air)/20.945)

where: “%O2 in air” is determined using the “Calculate %O2 in Air” tool with

Rh=100%, the pressure in the bubbler, and the water temperature in the bubbler.

The following conditions may result in inaccurate NOx readings:

1.

If the sensor is not held in air for eight hours (while powered) prior to calibration.

2.

If the pipe the sensor is mounted in during calibration is not heated.

3.

If the calibration model gases are not bubbled through water.

«
...
21
22
23
24
25
...
»

Содержание egrCAN

Страница 1: ...egrCAN Modular Multichannel Exhaust Gas Recirculation EGR Ratio and Lambda Measurement System Instruction Manual 10 23 2009...

Страница 2: ...Rights Reserved No part of this manual may be photocopied or reproduced in any form without prior written consent from ECM ENGINE CONTROL AND MONITORING Information and specifications subject to chang...

Страница 3: ...or and the Delta Tables 16 Calibration of the NTK NOx Sensor and the Delta Tables NOxCAN only 18 Calibration of the NGK NOx Sensor and the Delta Tables NOxCANg only 20 Using the dashCAN Display 22 MOd...

Страница 4: ...ii Safety Warnings 44 Warranty and Disclaimers 45 A two zone egrCAN system with optional module mounting panel and AC DC Power Supply EGR can be determined at two locations in the engine...

Страница 5: ...culate EGRv volume based EGR via the formula EGR 100 O2air O2int O2air O2exh Equation 1 where O2air Parameter O2 O2 output by the air module O2int Parameter O2 O2 output by an intake module An egrCAN...

Страница 6: ...2 Figure 1 Basic egrCAN System...

Страница 7: ...m of the O2 sensor Mount sensors so that no water will collect on either sensor Mount sensors where air velocity is as low as possible Apply pressure to pressure sensor through a or 6mm teflon hose if...

Страница 8: ...Preferentially mount downstream of turbocharger and upstream of exhaust catalyst egrCAN supports the use of multiple exhaust modules As with the intake pressure sensor the exhaust pressure sensor can...

Страница 9: ...t the power entry end This is not a requirement but it is the way the power entry devices are manufactured If the distance between the termination resistor see in Figure 1 and the CAN communication de...

Страница 10: ...b then the START button Within seconds the modules on the bus will be identified If they are not there is a possibility that two or more modules share the same node id To resolve this hook one module...

Страница 11: ...lowing formula calculates the minimum programmable broadcast rate used by all modules given a total number of TPDOs transmitted total for all modules Minimum broadcast rate ms total number of TPDOs fo...

Страница 12: ...r Exhaust Modules Fuel Constants Actual or Default of H C 1 85 O C 0 0 N C 0 0 Pressure Sensor Constants Enter sensor specific N and C values written on sensor cable for each module TPDOs Air Module O...

Страница 13: ...a N x V C V voltage from sensor See Appendix C Span O2 User enters displayed O2 TPDO data and the actual O2 of the span gas This is how you calibrate the Lambda sensor and the O2 and Lambda measuremen...

Страница 14: ...NOpen Error Code ECM CANOpen Error Code PR10 Praw10 bits 10 bit Pressure sensor output voltage unsigned integer format PCF Pressure Correction Factor Lambda sensor pressure compensation correction fac...

Страница 15: ...nsigned long format ERCd ECM CANOpen Error Code ECM CANOpen Error Code PR10 Praw10 bits 10 bit Pressure sensor output voltage unsigned integer format PCF Pressure Correction Factor NOx sensor Ip1 pres...

Страница 16: ...dbc button is pushed Data package information from all the modules is stored in the one dbc file produced Programs importing the dbc file and applying it to the CAN data transmitted by the modules wi...

Страница 17: ...old rev 0x0031 Pulse Red 3x 2s Vsw 9 for 7sec 0x0032 Pulse Red 3x 2s Vsw 30V 0x0041 Pulse Red 4x 2s VS too high 0x0051 Pulse Red 5x 2s RVS too high 0x0052 Pulse Red 5x 2s VHcommanded VHactual 0 5V fo...

Страница 18: ...are eight modules each sending two TPDOs the minimum broadcast rate is 5 ms The data transmitted is selected in the Data area of the Configuration Tool Activate the number of TPDOs to be used by click...

Страница 19: ...2int Parameter O2 O2 output by an intake module An egrCAN system can have multiple intake modules Thus multiple EGRs can be reported for different locations for EGR distribution studies or stages for...

Страница 20: ...nds useful sensor life Calibration of the O2 Lambda Sensor and the Delta Tables The Span O2 task is used to calibrate the O2 sensor This task calibrates both the O2 and Lambda AFR FAR PHI measurements...

Страница 21: ...equilibrium readings or readings that match another instrument For this purpose the Delta O2 Table is used The Delta O2 Table found in the task Open Delta Tables allows the user to add a number a del...

Страница 22: ...part should be calibrated in a similar manner as it is for the Lambda sensor i e using O2 Span It is important to realize that when in the exhaust of a running engine the NOx sensor is seeing water v...

Страница 23: ...mparison to a NOx CLA The NOx level doesn t have to be exactly zero for the zero process For example if it is 12 ppm the Configuration Software will allow this 4 Span NOx the sensor in a running engin...

Страница 24: ...ical gas analysis equipment ex NOx Chemiluminescent Analyzer CLA typically have the water removed from the gases before they reach the analyzer Thus classical gas analysis equipment will report dry nu...

Страница 25: ...i e same condition as Span O2 IMPORTANT NOTE Do not zero in pure N2 or N2 that has been bubbled through water This will damage the sensor 5 Mount the sensor in a vessel and pass bubbled model gases of...

Страница 26: ...3 If the ENT button is pressed the displays will show the units of the parameters 4 PCTG is dIM means dimensionless ex for AFR FAR PHI Lambda In RUN mode four things other than data can be displayed...

Страница 27: ...o the lower display The same module can be assigned to both channels or different modules can be assigned to each channel After entering MOd i e press ENT when MOd is displayed the serial numbers of t...

Страница 28: ...key 4 Press SYS to return to RUN mode CONF Configure Setup Option CONF setup appears at the end of the setup list on the lower display To enter CONF press the SYS key until MOd appears on the upper d...

Страница 29: ...ed This novel convention is sometimes used with lean burn engines 2 AFR and FAR range given for a fuel with an H C ratio of 1 85 3 FAR x 10000 is displayed This is the most commonly used way to expres...

Страница 30: ...sor s thread size is identical to that of the exhaust gas oxygen EGO sensors used in current production automobiles with 3 way exhaust catalysts Hex Size 22 mm Tightening Torque 40 4 Nm 30 3 ft lbf fo...

Страница 31: ...SS 6MO 6 Metric Fitting on Engine End of Tubing Swagelok SS 400 1 4 tube to NPT USA or Swagelok SS 6MO 1 4RT 6 mm tube to ISO tapered Metric Output Specifications CAN Protocol Broadcast Speed 500 kHz...

Страница 32: ...28 Appendix A egrCAN Kit Contents Basic System...

Страница 33: ...10 02 1m 3 7 Pressure Extension Cable 10 04 1m 3 8 2m Eurofast 12mm Cable 09 02 3 9 Flexi Eurofast Cable 09 04 0 3m 3 10 Eurofast T 09 05 4 11 Eurofast Terminating Resistor 09 06 2 12 DC Power Cable D...

Страница 34: ...rly configured in Stand alone mode or EIB mode depending on how it will be used When LambdaCAN and NOxCAN g modules are sold alone they are delivered in Stand alone mode When LambdaCAN and NOxCAN g mo...

Страница 35: ...d tighten ONLY turn from where it is seated If this nut is tightened too much the connector will crack and the enclosure will not be sealed 8 Connect the module to a power supply and a PC via a CAN co...

Страница 36: ...Module tab Select the CAN adapter being used Then start the communication Figure A1 Module prepared for Reprogramming P N 11 02 DC Power Cable DB9F Banana Plugs shown or P N 11 01 DC Power Cable To po...

Страница 37: ...for Done Message Stop communication and exit program The module is in Stand alone mode To convert a module from Stand alone Mode to EIB Mode 1 Use the Configuration Tool software to Set to EIB Mode 2...

Страница 38: ...t Therefore measurements made at the exit of a catalyst will require a Delta O2 Table and a Delta Lambda Table correction to be accurate This is sometimes called H2 Correction Wet versus Dry Measureme...

Страница 39: ...his in mind when comparing gas bench measured O2 with Lambda and NOx sensor measured O2 This difference can be corrected for by a Delta O2 Table Lambda Sensor Measured O2 versus NOx Sensor Measured O2...

Страница 40: ...CAN or NOxCAN g to an ETAS meter and you want the LambdaCAN or NOxCAN g to match the ETAS meter then you must span the LambdaCAN or NOxCAN g to whatever the ETAS meter says the O2 is in air even if it...

Страница 41: ...to open the software 2 Create a new Database In the Database menu select New Give your database a name i e a folder name In INCA a Database means the current working directory Each project is created...

Страница 42: ...38 5 Configure the hardware Click on the icon for the workspace you created in step 3 Open the Hardware Configuration icon under the section text 6 Hardware A hardware configuration window will open...

Страница 43: ...s example we are using an ETAS ES591 1 Expand the selection tree by clicking the next to the hardware device model Expand the CAN selection and select CAN Monitoring Click OK 7 Associate the dbc When...

Страница 44: ...ion Another window will pop up to confirm the device to connect to Click OK 9 Open an Experiment Environment Click on the Experiment Environment button on the upper tool bar to open an Experiment Envi...

Страница 45: ...displayed graphs charts gauges numeric etc When complete click OK We have left all configurations at default for this example 12 A new sub window will be added to the Experiment Environment You do not...

Страница 46: ...stopped To begin CAN monitoring click on the Start Visualization icon blue triangle on the left hand tool bar To stop CAN monitoring click the Stop Measuring icon black square on the left hand tool b...

Страница 47: ...Then press ENT 3 Press until LOCK is displayed Then press ENT 4 50 will be displayed Press until 60 is displayed Then press ENT dashCAN is now LOCKed To unLOCK dashCAN 1 Press SYS until LOCK is displa...

Страница 48: ...rCAN s cabling and sensor s on a stopped engine it is best to think out your moves before you make them Route and cable tie all cables away from hot moving sharp or high voltage spark objects Take int...

Страница 49: ...fitness for purpose whether express implied or arising by operation of law trade usage or course of dealing are hereby disclaimed The warranty is void if the display head is opened LIMITATION OF REME...

Страница 50: ...dashCAN DashCANc SIM300 SIM400 BTU200 To which this declaration relates are in conformity with the essential requirements of the following standards EN61326 1997 A2 2001 Class A Annex A EN61010 1 2001...

Страница 51: ......

Страница 52: ...Los Altos CA 94023 0040 USA 408 734 3433 Fax 408 734 3432 www ecm co com...

Отзывы:

Нет отзывов