MoTeC M1 Software Tutorial: EGT Input
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EGT Input
03.01
| 00:00 | If you want to monitor exhaust gas temperatures with an M1, this can be achieved in two ways. |
| 00:05 | A thermocouple amplifier can be wired to a spare analogue voltage input or you can add a MoTeC E triple eight or e eight one six expansion unit. |
| 00:15 | The E triple eight has eight built in thermocouple amplifiers, while the E eight one six provides sixteen analogue voltage inputs which can then be used in conjunction with a thermocouple amplifier. |
| 00:27 | You can then wire your each EGT sensor through the expansion unit and the data will be sent to the M1 via CAN. |
| 00:34 | We can configure this function from the ‘Multi Exhaust Temp’ worksheet in the ‘Engine Systems’ workbook here. |
| 00:41 | We will start by enlarging the ‘Calibrate’ element so we can see what we need to configure. |
| 00:46 | The configuration will vary if you are using a thermocouple amplifier of an expansion device for the EGT inputs so first we will look at configuring the inputs directly as analogue voltage inputs. |
| 00:58 | In this case we can leave the ‘E8XX Mode’ set to disabled as this is only used for an expansion device. |
| 01:06 | Likewise the CAN bus is not used. |
| 01:09 | Now we have some diagnostic settings that the M1 will use to decide if the sensor is faulty. |
| 01:14 | As usual, these need to be set outside the normal operating range of the input so they are only exceeded if the input is actually faulty. |
| 01:23 | This works in conjunction with the ‘Diagnostic Delay’ value and the diagnostic values will need to be exceeded for this long before the sensor is considered to be in fault. |
| 01:32 | The default value will be used as the reading for this particular cylinder if the sensor is deemed to be in fault. |
| 01:38 | We will just move out of order for a second and moving down a little, we can define the voltage resource that this particular EGT sensor is wired to and the voltage reference which will depend on which voltage resource you are using. |
| 01:51 | Now we can move back up and set the calibration for the thermocouple amplifier. |
| 01:57 | If the signal is particularly noisy you can also choose to filter the value if necessary. |
| 02:03 | If you are using an expansion unit, we need to go back to the start and enable the ‘E8XX Mode’ and define which CAN bus it is connected on. |
| 02:13 | In this case the ECU will receive the data via CAN so we need to make sure the ‘Voltage Resource’ is set to ‘Not in Use’. |
| 02:21 | Next we need to define which CAN slot the data will come from and these can be viewed from the drop down menu. |
| 02:28 | The inputs listed with ‘TC’ in the title are dedicated thermocouple inputs available on the E triple eight. |
| 02:35 | If the data is coming from an E triple eight thermocouple input, you can leave the ‘CAN Type’ set to ‘Calibrated’ and you don’t need to worry about the ‘CAN Scale’. |
| 02:44 | If you are using an analogue voltage channel from the expansion unit then you will need to set these to suit the input the M1 is receiving. |
| 02:52 | The process for setting up any additional EGT inputs is just a repeat of this process. |
