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1、GEMS-K1 ECU hardware design Documentv 0.3 14nd Sep 2008GEMS-K1 ECU hardware design DocumentTianjin UniversityInfineon Automotive Electronic Joint LaboratoryAuthor: NengHui Zhou- 60 of 60 -TJU-IFX Joint LabRevision historyVersionByModificationsV0.1, 14st Aug 2007Nenghui ZhouFirst draftV0.2, 18st Jan
2、2008Nenghui ZhouAdd the contents (3.63.8, 79)V0.3, 14st sep 2008Nenghui ZhouUpdate the document after finishing the 2nd HW，Attention please!This document is only for internal use in the GEMS-K1 project. Tianjin university Infineon Automotive Electronics Joint Lab 2008.All Rights Reserved.Content1.Ge
3、neral description of ECU hardware42.Hardware design Requirements43.Differences between 1st version and 2nd version64.ECU configuration and each modules function64.1 Microcontroller module84.2 Power supply module154.3 Input signal conditioning184.4 Crank and Cam signal conditioning184.5 Ignition modu
4、le194.6 Low side switch module214.7 ETC module254.8 Serial Communication module (CAN and KWP)295.Designed for reliability345.1 Protection and diagnostics at Inputs345.2 Protection and diagnostics at Outputs356.Components list of the ECU417.Connector Pin Assignment of the ECU448.PCB layout479.Hardwar
5、e evaluation and test5110.Appendix5210.1 Schematic521. General description of ECU hardwareThis ECU is designed for four cylinders gasoline engine which based on infineons 32 bit microcontroller, power unit and other components. It can receive signals from sensors, process them with software, and the
6、n transmit the converted controlling messages to actuator so as to fulfill the target of controlling the injection and ignition and so on. When the engine management system has faults, this ECU can self-protect and diagnose the faults position and type, store the fault codes in ECU for maintenance a
7、nd communication with other equipments via KWP2000 and CAN bus protocol. This ECU is a full reference design which can meet the need of different gasoline engines and customers.2. Hardware design RequirementsGEMS-K1 ECUs hardware design must have high level requirement as fellow:1. ECU based on TC17
8、662. Monitor and fail safe based on PCP ( inside TC1766 )3. 4 cylinder4. 4 On board IGBTS (drive with only 2 or 4) or 4 discrete EST (for external smart pencil coil).5. ETC control with optional ISCV6. VVT actuation7. Stepper Motor option for cable/spring driven throttle blade control8. VR crank int
9、erface/option for Hall interface 5V or 12V pull-ups.9. DSP knock filter (reuse PSK interface )10. 2 lambda and heaters (normal)11. Charcoal Canister Purge12. Cooling Fan( by relay)13. Fuel Pump ( by relay)14. Air conditioning (relay)15. Single CAM phase on intake16. 5V sensor interface by level shif
10、ting to 3.3V17. 4 layer FR4 PCB provision of mounting with spacers or onto casing18. Ambient temperature -40 to 105C continual operation19. Able to be protected against static voltage of 24V for a duration of 1 min 20. Reverse battery protection with standard car battery potential for a duration of
11、1 min21. All ECU I/O connector pins except supply and GND pins are to be protected against short to ground and Short to battery scenarios.22. All sensor Inputs have default operation in case of fault.23. All load inputs and outputs have diagnostics in case of fault (except Diagnostic lamp 1, 2, and
12、engine speed but protection is needed for their driver.)24. All inputs signal conditioning must be able to cope with transient operations and the frequency of voltage change. Low/ pass filters used in signal conditioning should not attenuate the voltage value in the operating range of the sensor inp
13、uts25. All ECU pins must have bypass caps consideration to protect against ESD (SAEJ113-13 direct contact discharge +/-10KV, Airgap discharge +/-18KV).26. ECU must be able to pass load dump scenario of 80V for a duration of 400ms(the rise and fall time of this 80V peak is within the duration of 400m
14、s.27. There must be a circuitry implementation regardless with on-chip or with discrete solution to allow TC1766 to detect the coil current.28. ECU must make provision of a pin from the connector that could be pulled high/low for ease of diagnostic with lamp29. ECU must have three operation mode. (m
15、ode= application/functional/manufacture test). 30. ECU able to accept two pedal position signals31. Size of ECU ( together with casing ) should be of the same size or smaller than a existing 4 cylinder controller in the market32. ECU must make considerations to pass the various tests mentioned in the Hardware test checklist. (for those that are not mentioned here)33. Supply pins of ICs, regardless of voltage value, should be considered to have decoupling caps to handle voltage dip senarios during sudden draw
