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Nira i7r Handbook

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NIRA i7r
Handbook
NIRA i7r Handbook version A6, December 2015

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Summary of Contents for Nira i7r

  • Page 1 NIRA i7r Handbook NIRA i7r Handbook version A6, December 2015...
  • Page 2 NIRA i7r must be installed by professional automotive technicians in accordance with the instructions in this handbook, following good practice. NIRA i7r is only intended for racing use and not for use on public roads. It is not certified for use on vehicles subject to emission standards unless the appropriate waivers have been issued.

  • Page 3: Table Of Contents

    3.11 Boost Pressure Actuator ................25 3.12 Main Relay ..................... 27 3.13 Pre Fuel Pump Relay ..................28 3.14 Mounting NIRA i7r in the Vehicle ..............29 4 NIRA rk Software ....................29 Installation of NIRA rk ..................30 Getting Started ....................30 Using NIRA rk ....................
  • Page 4 Going Online ....................85 Quick Troubleshooting Guide ............... 88 Other Adjustments ..................89 8 Electrical Specifications ..................90 Input ......................90 Output ......................92 Communication ..................... 93 9 Appendix A ......................94 10 Appendix B ......................95 © 2005-2015 Nira Control AB...

  • Page 5: Overview

    It also gives you significant control over the mapping of the output signals. This allows NIRA i7r to work with many different sensors, actuators and engine types. Setup, configuration and programming of NIRA i7r is done via the NIRA rk software.

  • Page 6: Glossary

    NIRA rk is the calibration software that allows you to setup and configure a large number of parameters in NIRA i7r. It is designed to run on a PC using the Windows operating system and communicates with NIRA i7r via a Kvaser CAN-dongle.
  • Page 7 +12 V (or +5 V). Terminal 15 (kl 15) Terminal 15 is a term used to describe battery voltage (+12 V) after the ignition switch. Most sensors and actuators used with NIRA i7r that © 2005-2015 Nira Control AB...

  • Page 8: Nira I7R Functionality

    NIRA i7r reads sensor values, processes the data and sends output signals to various actuators. NIRA i7r is a fully sequential engine management system for engines with up to 8 cylinders. By using the NIRA rk software, you have the ability to modify many of the parameters that control the data processing and the output signals in NIRA i7r.
  • Page 9 0-5V analog input) 1.3.2 Output Functions NIRA i7r processes the input signals and controls the output signals in order to manage the following actuators.  8 Fuel injectors (amount and sequence)  Fuel Pressure Control (controls pressure control and/or volume control valve) ...

  • Page 10: Combustion, Lambda And Measurement Principles

     Logging – advanced data logging and graphical analysis tools in NIRA rk software Combustion, Lambda and Measurement Principles For combustion to take place, oxygen needs to be available. The oxygen content of the air changes with air temperature and pressure.

  • Page 11: Measurement Principles

    A/F and lambda. Measurement Principles Two key measurement principles prevail in the operation of NIRA i7r: The engine position (and derived values such as rotational speed, speed rate of change etc) is measured using the angular positioning measurement principle. This measurement is crucial for the control of critical events such as injection timing etc.
  • Page 12 The output levels from the sensor will increase proportionally to the speed of the tooth passing the sensor. Example of an inductive CKP sensor signal when a ”2 lost” is detected from a pulse wheel with a ”60 – 2 lost” pattern © 2005-2015 Nira Control AB...
  • Page 13 In the “lost gap” the zero crossing is widely spread and can’t be uniquely defined By swapping the polarity of the inductive sensor the signal will be inverted. NIRA i7r uses zero crossing detection at falling edge, which means the scope picture has to look like the pictures above.

  • Page 14: Installing Nira I7R

    Begin by determining if additional sensors are needed and where to install them. Make sure any existing sensors you expect to use with NIRA i7r are in good working order. The NIRA i7r wiring harness has markings in clear text on each wire to simplify the work of connecting all the sensors.

  • Page 15: Injectors

    Note that there are different hardware for Piezo Injectors and Solenoid Injectors. Make sure that your Nira Hardware fits the injector before connecting the injectors. All injectors for Nira i7r is connected in the same order as firing order with start at cylinder one...

  • Page 16: Fuel Pressure Control Actuators

    The Pressure Control Valve (PCV) is fitted on the fuel rail. Connection of PCV Variation Actuator Pin NIRA i7r pin Name 12v Supply Main Rly kl87 VCV &PCV valve fitted Signal E.104 CCO3 12v Supply VCV valve only Signal N.C. © 2005-2015 Nira Control AB...

  • Page 17: Crank Position Sensor (Ckp) And Trigger Wheel

    This signal is provided by a crank position sensor that creates the signal by reading the pattern of a pulse wheel that is fitted to the crankshaft. NIRA i7r supports both hall sensors and inductive sensors.
  • Page 18 16 – 2 lost NIRA i7r reads symmetrical pulse wheels that are split into a maximum of 60 sections (60 – 1 lost, 60 – 2 lost) and a minimum of 16 sections (16 – 1 lost, 16 – 2 lost). All symmetrical patterns in between are compatible with NIRA i7r.
  • Page 19 There must not be any doubts regarding what type of pulse wheel that is fitted on the engine. The pattern must be entered into NIRA rk and it is absolutely necessary to enter the correct values to be able to start the engine.

  • Page 20: Cam Position Sensor (Cmp)

    Picture 3-1. Measuring the TDC to ”2-lost” angle. Cam Position Sensor (CMP) Since the fuel injection is controlled sequentially with NIRA i7r, a signal that tells NIRA i7r the engine’s phase in the combustion cycle is necessary. NIRA i7r thus requires that the engine has a Cam Position Sensor.

  • Page 21: Acceleration Pedal Position (App)

    NIRA i7r connector. Therefore, the “Crank” and “Cam” wires must be fitted to the correct connector matrix on installation. Instructions for the cam sensor are found in the table below.

  • Page 22: Engine Coolant Temperature Sensor (Ect)

    Engine Coolant Temperature Sensor (ECT) The ECT sensor is used by NIRA i7r to monitor overall engine temperature and for cold start enrichment. If you plan on using the ECT sensor that came with your engine you will need to know or establish its resistance as a function of temperature. This information is often available in the service manual for your engine.

  • Page 23: Lambda Sensor

     Avoid heat soak of the sensor wiring after engine swtish off 10 degrees Accepted mounting angles 10 degrees Correct mounting of LSU 4.9 sensor Your NIRA i7r dealer supplies LSU 4.9 sensor kits. A harness with pre crimped NIRA i7r terminals is included. © 2005-2015 Nira Control AB...

  • Page 24: 3.10 Exhaust Gas Temperature

    Make frequent inspection of the sensor to make sure it is in order. A broken sensor will immediately destroy the turbo. Picture 3-5: The NIRA EGTC sensor probe mounts where the headers collect, before the turbo. © 2005-2015 Nira Control AB...

  • Page 25: 3.11 Boost Pressure Actuator

    3.10.1 Input Filters All inputs to NIRA i7r, including the Aux inputs, can be filtered using the “Advanced” setting in NIRA rk. Sometimes this is useful when dealing with noisy input signals in order to improve readability during data logging.
  • Page 26 Boost control valves have three port and two or three connection pins NIRA i7r controls the boost pressure actuator by giving the valve a PWM-signal. A pressure drop that depends on the PWM-signal is created over the R-port and thus the pressure that reaches the waste gate actuator is controlled.

  • Page 27: 3.12 Main Relay

    PWM output or an H-bridge output to control the boost pressure actuator. This configuration is done using NIRA rk. 100% 0% duty duty ”R” Return ”R” Return ”C” ”C” ”W” ”W” Compressor Compressor Wastegate Wastegate Bypass flow through the Boost Pressure Actuator dependent on the PWM through the actuator coil Boost control valves either have two or three connection pins.

  • Page 28: 3.13 Pre Fuel Pump Relay

    It must be connected to terminal 15. Connect one side of the relay coil to terminal 15. Connect the other to the wire marked “Pin V.72” in the NIRA i7r harness. Always connect a fuse with proper rating. Connect each pin due to table below.

  • Page 29: Mounting Nira I7R In The Vehicle

    In order to be able to start the engine you need to calibrate NIRA i7r using NIRA rk. To ensure a successful calibration effort, it’s recommended that you study the NIRA rk sections in the handbook in order to understand how to use this tool to calibrate an engine before you try to start the engine the first time.

  • Page 30: Installation Of Nira Rk

    To install NIRA rk on your PC, execute the NIRA-rk.exe file supplied on the memory stick that is part of your NIRA i7r package. This will launch the NIRA rk Setup Wizard, which will guide you through the installation process. Follow the directions in the dialog boxes.
  • Page 31 In this screen you can choose among several options. Open File... lets you open an existing i3d file (a file with calibration data.) Read from NIRA i7r loads calibration data from NIRA i7r into NIRA rk. Start from Default starts NIRA rk with default settings.
  • Page 32 4.2.3 Wizards If you opted to start NIRA rk in default mode (see previous section), you must go through all Wizards before you can load any calibration data to NIRA i7r. This is necessary in order to ensure that you’ve entered appropriate values for all Engine Setup-parameters before you start mapping.

  • Page 33: Using Nira Rk

    Offline in it. This status bar shows the state of the connection to NIRA i7r. In order to go online and be able to upload mapping data to NIRA i7r, you first have to go through all steps of all NIRA i7r Engine Setup Wizards.
  • Page 34 Picture 4-5: The “Preferences” tab lets you add comments and choose whether you want to simulate engine running values (Engine Simulator) or connect to NIRA i7r. Before attempting to connect to NIRA i7r, ensure that the drivers for the Kvaser USB- CAN dongle are installed on your computer. These drivers are available on the USB stick delivered together with NIRA i7r.
  • Page 35 4.3.2 Tabs NIRA rk uses tabs to organize different views of parameters, graphs, tables etc. When a new window is opened a new tab is added. This allows for quick switching between views. Each new tab gets a number in addition to a name.

  • Page 36: Parameters

    All monitors are available under the category called “Monitor Output” found on the left side of the “Mappings” tab  A value: Certain parameters are related to output signals from NIRA i7r, e.g. to the fuel injectors or the boost pressure control valve. Other parameters are constants used by NIRA i7r to calculate output signals or interpreting input signals.
  • Page 37 Alarms In addition to the built-in diagnostic alarms in NIRA i7r, which, among other things, check input signal levels, it’s possible to set user alarms using NIRA rk. Hit F5 or right- click on a parameter and choose “Set Alarm…”...
  • Page 38 Enter Alternatively, double-click on the parameter name. If you’re online with NIRA i7r at the time, any changes in the parameter value will be uploaded to NIRA i7r immediately. Otherwise, the changes will be uploaded next time you connect to NIRA i7r.
  • Page 39 ). This icon indicates that the parameter is a table. Tables can be two- or three-dimensional. Tables control output values from NIRA i7r based on other parameter values. Typically these parameter values are sensor values, such as rpm or MAP.
  • Page 40 %-age increase/decrease of the cell values (for the keys.) – In the case above, the value would increase with 0.1 if you hit the key and increase 10% if you hit key. If multiple cells are highlighted, they will all be affected. © 2005-2015 Nira Control AB...
  • Page 41 A dialog box appears in which you can choose to interpolate horizontally or vertically, to fill all cells with the same value or to fill the cells with stepwise increasing values in different directions © 2005-2015 Nira Control AB...
  • Page 42 The axis values can only be edited in offline mode. Changes applied in NIRA rk during offline adjustment take effect when the data is loaded to NIRA i7r by the user going online and choosing update NIRA i7r. Note that the axis values have to increase monotonously.
  • Page 43 The entire column or row will be marked green. Once you let go of the mouse button or the key, a dialog box will appear in which you can choose among different fill Ctrl methods. Picture 4-16: Drag Fill: Filling axis and table cells. © 2005-2015 Nira Control AB...
  • Page 44 When choosing ”Copy”, make sure the result of the copy doesn’t create an axis with axis values that aren’t all equal or increasing looking rightward (x-axis) or downward (y- axis.) Should this happen anyway, NIRA i7r will go offline and you need to fix the axis values before you can go online again.
  • Page 45 Picture 4-18: F5 or the "Toggle Graphics"-button switches to a graphical view of the table. This is a one-dimensional table. While in the graphical view, it’s possible to move among the cells and change their value with the keys, just like in the table view. – © 2005-2015 Nira Control AB...
  • Page 46 Operating Point When NIRA i7r is online, NIRA rk can show where in a table NIRA i7r is currently operating, the so-called operating point. This is very helpful during the calibration effort. By checking the ”Follow” checkbox or turning this feature on/off with , NIRA rk can move the currently highlighted cell to the operating point.

  • Page 47: Pid Controllers

    PID Controllers NIRA i7 uses a number of PID controllers. A general functionality overview follows in this chapter. 4.5.1 What is a PID controller? A PID controller is named after the Proportional, Integral and Derivative control modes it uses. PID controllers are used in most automatic process control applications in industry and automotive.

  • Page 48: Gauges

    There’s a predefined dashboard in NIRA rk. It contains a few standard gauges. The selection of gauges offer an easy general system check, and they’re also very useful to display on your notebook computer when you’re testing NIRA i7r in a vehicle or dyno. © 2005-2015 Nira Control AB...
  • Page 49 Picture 4-21: NIRA rk Dashboard. The Dashboard is brought up by hitting on the keyboard. The Dashboard is available in two versions. The difference is the rpm range. One version goes up to 7000 rpm, the other to 11000. Choose the most appropriate one for your engine.
  • Page 50 If you want to capture longer durations and graph them, use the logging feature in NIRA rk. See section 4.7 • BAR turns the gauge into a bar graph. The Engine Temp gauge in picture 4-22 is an example of a bar graph In the Gauge, Plot and Bar modes, there’s a ”Set”...

  • Page 51: Logging

    Logging NIRA rk includes a powerful logging feature. Any parameter can be logged and there’s no limit to the number of parameters that can be logged. However, as the number of parameters increases, the sampling rate decreases. The log can be saved to a file and shown graphically.
  • Page 52 NIRA rk, whether you’re calibrating a table, showing gauges or reading help screens. Note: When logging is active, no parameters are updated in NIRA rk. The reason is that NIRA rk instead tries to sample the logging parameters as fast as possible. The operating point is updated, though, and all alarms are still active.
  • Page 53 You can open an existing log file by selecting ”Load log file…” under File in the main menu or by hitting on the keyboard. Ctrl-F8 Note: You can also load NIRA rk log files in MATLAB. 4.7.5 Graphical Presentation Select the ”Plot” tab to view the logging graphically.

  • Page 54: Locking The I3D Data Set

    Protect the i3d data file by choosing File  Lock i3d Data Set… A password can be entered that will disable access to the calibration data developed, unless the password is entered when the data is loaded to NIRA rk. FlexiPorts™ - Set up Example for setting up a FlexiPort for boost controller.
  • Page 55 E.g like below for a grounded switch. Positive values will be added to the boost setpoint and negative values will subtracted from the boost setpoint. If open loop control is used there is a correlating table for that. © 2005-2015 Nira Control AB...

  • Page 56: Fuel Handling

    NIRA i7r controls Fuel Mass, Injection angles for two injections (Pilot and Main) and Fuel Pressure. Fuel Mass NIRA i7r handles fuel mass by a percentage value, all percentage values refer to the value: Engine Setup -> Engine Specification -> Bv Fuel Mass Cycle Max [mg/cycle] The final output of fuel mass is Mappings ->...
  • Page 57 − Oil Temperature − Ambient air pressure − Ambient air temperature − Smoke (e.g. a certain A/F) − Exhaust gas temperature. − Engine speed (e.g. over speed or rev limit) − Fuel Mass Rate of change © 2005-2015 Nira Control AB...
  • Page 58 Ca FML ExTemp Int Max Overview of Fuel Mass limitation (except Rate Of Change) 5.1.3 Basic Fuel in NIRA rk Matrixes and labels related to Demand source. Mappings -> 1. Fuel -> 1. Basic -> Demand xxx − Demand Torque (Conversion from Acceleration Pedal Position to a fuel rate) −...
  • Page 59 − FMSP Fuel Mass Setpoint [Actual Fuel Mass after limitation] − FML Extemp Error [Indicates the ExTemp controller error] − FML Extemp Reg Output [Output from the ExTemp PI-Controller] − Estimates A/F Ratio [Calculated A/F Ratio] © 2005-2015 Nira Control AB...

  • Page 60: Injection Control

    Injection Control The injection control tables control the injection angles. One Pilot injection is supported. For extended Injection Control contact Nira. All injection angles relates to  Start of injection (SOI)  Crankshaft degrees (csd) Two revolutinos, 720 degrees Cyl 1 Tdc...
  • Page 61 − Inj Mass Pilot 1 [The main table of pilot mass, based Injected fuel mass / stroke] − Inj Mass Pilot 1 Engine Coolant Temp Compensation o Inj Mass Pilot 1 Ect [Maximum angle compensation] © 2005-2015 Nira Control AB...
  • Page 62 [Maximum angle compensation for ECT] o Inj Angle Pilot1 ECT Factor [% of Maximum angle to be used] − Inj Angle Pilot1 Comp. [General Compensation based on Fuel temp, Ambient Pressure and Manifold Air Temp] © 2005-2015 Nira Control AB...
  • Page 63 Inj Angle Main Comp = 0 csd Injection angle pilot 1: 12 + 3,2 + 0 = 15,2 csd Before Main Injection Injection Angle pilot 1: 12 + 3,2 + 0 + 6 = 21,2 csd BTDC © 2005-2015 Nira Control AB...
  • Page 64 5.2.3 Injection Control in NIRA rk Matrix and labels related to the Injection angles without pilot injections Mappings -> 1. Fuel -> 2. Injection Control-> Inj xx − Inj Angle Main [Inj angle main based on Requested fuel and Engine Speed] −...

  • Page 65: Fuel Pressure Control

    Fuel Pressure Control NIRA i7r controls either one or two control valves for fuel pressure control. One in an open loop mode (VCV-valve) and one in closed loop condition (PCV-valve). If a system with one control valve is used, that one should be connected to the output that supports closed loop control.
  • Page 66 Fuel Mass Request Fuel Pressure Setpoint Base FPC_PS_Min FPC_PS_Rate_Min Colant temperature Pressure Setpoint Correction Coolant Water Temperature Pressure Setpoint Correction Intake Air Temperature Fuel Temperature Pressure Setpoint Correction Fuel Temperature Pressure Setpoint Correction Intake Air Pressure © 2005-2015 Nira Control AB...
  • Page 67 5.3.2 Fuel Pressure Controller The layout of the FPC PID follows Nira General PID controller (see Appendix A). The PID controller output is transferred through a linearization matrix which makes it possible to both invert the output and compensate for non-linear behaviour of the actuator as well as changing battery voltage which affect the current going through the actuator coil.
  • Page 68 5.3.3 Fuel Pressure Control in Nira Rk Input/sensors Engine Setup -> Sensors -> xxx − BV Fuel Pressure [Setup of fuel pressure sensor (volt/pressure conversion)] Actuator Control Mappings -> 1. Fuel -> 4. Pressure Control -> xxx − Fpc VCV Duty [Duty cycle for the VCV-valve (open loop)] −...

  • Page 69: Boost Controller

    Boost Controller The NIRA i7r boost control calculates a regulator output using a closed loop PID controller. The regulator output can be used to control either a vacuum valve or a electric motor actuator, the latter is commonly used on e.g. VGT turbo systems.

  • Page 70: Boost Actuator Control Mode

    BAC OutX Ctrl Mode BAC OutX Fixed duty Bac OutX Duty Bac OutX Max BC Reg Output Bac OutX Setpoint BAC OutX Setp Scale Bc Setp Boost Engine Speed BAC OutX Setp Scale Comp Boost Actuator Control Mode © 2005-2015 Nira Control AB...

  • Page 71: Boost Controller

    BC_surge will handle a timer for how long the surge label can be set to TRUE. Time out or increment rate of fuel over a limit value will set the surge label to FALSE. © 2005-2015 Nira Control AB...
  • Page 72 The reg output is limited to user defined values. The maximum reg output value is taken from a matrix and the minimum reg output is a constant. This limitation is always done as a last step of calculation. © 2005-2015 Nira Control AB...
  • Page 73 6.3.4 Boost Controller in NIRA rk Boost Controller Actuator Output Mappings -> 3. Boost Controller -> 1. Fixed Duty -> xxx − BAC OutX Ctrl Mode [Actuator control mode] − BAC OutX Fixed Duty [Duty cycle used when Ctrl Mode is set to fixed duty] Mappings ->...

  • Page 74: Starting The Engine

    If you’ve read the previous chapters and followed the installation instructions, NIRA i7r should be installed in your vehicle and you have an understanding of how NIRA rk is used. This chapter describes how to start the engine in a safe manner.
  • Page 75  Tpu Cam Window Start: From this point the system looks for a cam sensor transition. The transition should occur within number of csd set in TPU Cam Window Width  Tpu Cam Window Width: Set the distance from TPU Cam Window Start that the transition should occur within © 2005-2015 Nira Control AB...
  • Page 76 Rising 7.1.2 Engine Setup -> Engine Specifications Engine Specifications is related to the engine hardware. Values entered in this section are used for air mass, fuel mass calculations and cylinder individual timing. © 2005-2015 Nira Control AB...
  • Page 77 Bv Fuel Mass Cycle Max Maximum total fuel mass that would be injected during one cycle (eg. two revolutions). All percentage fuel mass values in Nira Rk relates to this value. Bv Key Source 0 = Normal Key operation by ignition key.
  • Page 78 The injector has to be measured in a test rig to determine the injector characteristic. It’s crucial that injector drivers is properly set up to make the injector correspond to the Conv table The Injector Conv is individual for each type of injector. Contact Nira for more information © 2005-2015 Nira Control AB...
  • Page 79 +20V (MAX190 V) Typical values of injector voltage Adjusting these values could make permanent damage of the unit. Contact Nira for more information Pz Sup Pwm Max / Min On Time (i7rs & i7rp) Controlling limits for the internal voltage regulator.
  • Page 80 Pressure output will be linearized for voltage measurement in between the min and max voltage value. Note: It’s only allowed to edit axis value while you’re offline. © 2005-2015 Nira Control AB...
  • Page 81 Example calibration data for a pressure sensor from the sensor data sheet P1 = 50kPa, P2 = 400kPa Example of pressure sensor characteristic in NIRA rk Each pressure sensors has a low pass (LP) filter possibility for smoothing out and filtering disturbances.
  • Page 82 Resistive Bv EGT Resistive Resistance measurement of Pt200 or Pt1000 Acceleration Pedal Position (APP) For Throttle calibration the system needs to be switched on. The procedure is described in the Online Chapter © 2005-2015 Nira Control AB...
  • Page 83 7.1.6 Mapping -> AUX -> Output -> NIRA i7r provides two fully customable relay controls. Name Controlled by Comment Related pin 2D matrix with user Do Rly2 The output pin is active low V55, Fan RLY defined axis Relay Control uses hysteresis. The Relay Control only switches when the matrix output is one or zero.
  • Page 84 Between 80 and 90 degrees the output from the matrix will be in between one and zero and the output will not be affected. Change the values in the matrix axis to achieve a more narrowband hysteresis. © 2005-2015 Nira Control AB...

  • Page 85: Going Online

    Later you can select Read NIRA i7r if you want to download all the settings from NIRA i7r into NIRA rk so you can save them as an i3d file. (This is very handy if, for some reason, your PC were to hang while you’re in the middle of calibrating the engine since you can always go back and download the most recently used calibration.)
  • Page 86 100% when you depress the pedal fully. This can be done with the help of the “Accelerator Calibration Wizard” in NIRA rk. If you want to calibrate the Throttle Sensor manually, follow the steps below.
  • Page 87 Your engine should start fairly quickly and show reasonable values on the dash. If any instrument is showing an unreasonable value or if an Alarm icon appears, something is wrong in one of the parameters in Engine Setup, or the electrical installation is problematic. © 2005-2015 Nira Control AB...

  • Page 88: Quick Troubleshooting Guide

    2 seconds every time the ignition key is turned to the Key On Engine Off position (KOEO) position if the fuel pump and fuel pump relay are connected correctly. The pump also runs whenever the engine cranks and NIRA i7r sees a correct signal from the CKP sensor ...

  • Page 89: Other Adjustments

    Other Adjustments Since you were able to start the engine you are now ready to begin adjusting parameter values in order to improve engine performance. © 2005-2015 Nira Control AB...

  • Page 90: Electrical Specifications

    Pull Up 1.5 kohm 12 bit A/D Boost Actuator position Input voltage range 0-5V Pull Up 3.0 kohm 12 bit A/D signal Boost temperature Rnominal = 2-3 Kohm @ 25°C Pull Up 3.0 kohm 12 bit A/D © 2005-2015 Nira Control AB...
  • Page 91 Pull Up 3.0 kohm 12 bit A/D signal APP 1 signal Input voltage range 0-5V Pull Down 100 kohm 12 bit A/D APP 2 signal Input voltage range 0-5V Pull Down 100 kohm 12 bit A/D © 2005-2015 Nira Control AB...

  • Page 92: Output

    Rout = 0.12 ohm @ Boost Actuator H-bridge M- H-bridge, 5A 25°C Fuel injector 1 Fuel injector 2 Fuel injector 3 Vout_lo approx 0.5V Fuel injector 4 @ Iout = 10A Fuel injector 5 Fuel injector 6 © 2005-2015 Nira Control AB...

  • Page 93: Communication

    Iout = 5mA Ignition 6 Vout (typ) < 0.3V @ Ignition 7 Iout = -30mA Ignition 8 Communication Electric Communication Type Comment charachteristic CAN HI Termination resistor Compliant to ISO between signals 120 11898-2 CAN LO © 2005-2015 Nira Control AB...

  • Page 94: Appendix A

    Appendix A Nira General PID functionality. SetPoint Actual Value (measured) P-term Integrator handling Integrator handling I-term D-term EXE_TIME Fuel mass request Feed Forward Nira General PID controller...

  • Page 95: Appendix B

    = 2 ^ scale Integrator Scale Aritmetic shift A ≠ B Tracking Error Tracking Gain = 2 ^ scale Tracking scale Aritmetic shift Tracking Nira General PID controller Integrator handling Appendix B Schematics: See schematics_i7r_revA.pdf or later version © 2005-2015 Nira Control AB...

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