Small (appr 4 liter) gas engine, 4 cylinder, 1500 RPM
(some comments on this page are Hungarian)
While 1st serial port is connected to VemsTune,
2nd serial port acts as a "modbus RTU slave" and accepts commands from a "modbus RTU master" device.
- Useful for external datalogger, powerplant master controller (shutdown, and commands to allow procedures to-grid-sync or go off-grid island mode with RPM-target based IAC control).
- currently dwell is same for all cylinders...
- per cylinder dwell would be nice to extend sparkplug life somewhat... as these controllers can run engines for 60000 + hours (possibly consuming multiple cylinder liners or even engines), equivalent to 4 million kilometers or more (in car "mindset"), 75+ set of sparks (and service intervals), even just a few percent gain in sparkplug life is significant.
ECU serialnr=... ?
Grounds
- EC36/5
- EC36/21
- EC36/22
- EC36/32
- EC36/26
See MembersPage/PhatBob/UserGuide
Supply +12V or +13.5V (not +24V !!!)
- EC36/25 (1-3A fuse, if stepper output not used)
Sensors
5 EGT (order comment: "5 EGT inputs") 4 individual + 1 mixed
- K-compensation cable (kompenzációs kábellel bekötni)
CLT Coolant Temperature (hengerfej víz temperature)
- EC36/14 (és a GND közé)
MAT Manifold Air Temperature (gázkeverék temperature osztócsoben) 0-5V signal
- EC36/2 (és a GND közé) not K-type
- to use with K-type (eg. EGT2 mcp3208/ch4) firmware modification would be needed... (maybe some special case of the 17-point curve, the 1000C area obviously won't be used)
TPS (folytószelep pozíció)
- EC36/1 (0-5V analog)
MAP : Manifold Absolute Pressure, pneumatic connector (szívócsonyomás, abszolút 0-300 kPa ?)
Trigger input
- EC36/27 Primary trigger, HALL 8-1 (or 12-1 or 12-2)
- configurable rising (felfutó) or falling (lefutó) edge
- after missing tooth, recommended pulse positions: 40-60 and 10-20 crankdegrees BTDC (BTDC == fotengely fokkal felso holtpont elott)
Warning: since this engine has primary trigger on the camshaft, not the crankshaft as usual, 6-1 is not suitable, only 8-1 or 12-1 or 12-2 (or some even higher toothcount).
- NO EC36/13 Secondary trigger: HALL, 0 pulse
- configurable rising (felfutó) or falling (lefutó) edge
- (vezermutengely jelado, a fotengely hianyzo fogatol legalabb 70 fokra)
EC36/28: +5V output for HALL sensors (max 50mA recommended)
Ignition outputs (1,3,4,2 firing order)
- EC36/34 (IGN/2) cyl1
- EC36/36 (IGN/3) cyl3
- EC36/24 (IGN/6) cyl4
- EC36/10 (IGN/7) cyl2
4A biztosítékon át a gyújtótrafó másik vége tápfeszre (+12V vagy +24V DC) van kötve
Starter config
- Primtrig 8-1 on cam, next_trigger_tooth=2, ignouts: 2,3,6,7 appr. 2.2 msec dwell
- fuelcut 1600, igncut 1700 RPM. They 'll have to adjust primtrig/rising/falling and TDC-delay of course.
- Maybe we need to cheat with the cylnr=2 (not 4) so that "double RPM" is shown so RPM shown correctly (8-1 on cam)
- req_fuel=16msec, VE=200 (near flat, or minor grassy knoll) because at 1500 RPM (80 msec / camrot) 32msec = 40% duty=8kW / 20kW
- with LPG, it should idle between 32 and 40 msec
- CLT and MAT enrichment all 100% for now
IAC PWM output
Possible PWM voltage for Woodward 5-32VDC
- Power Throttle Valve (teljesítmény pillangószelep)
- TPS in EC36/1 0,75-4,25VDC CORRECT??
- 0-90% (or 10-90% )
- EC36/pin11 (ign4) 0/5V (max: 1.1mA)
- alternatively: EC18/pin4 (Stepper A) 0/12V
Woodwars spec:
PWM Command Input (+PWM at pin 11, PWM ground at pin 3)—This actuator
can be configured to handle a PWM signal from a high-side or low-side opencollector
or open-drain source, as well as from a push-pull (customer pull-up)
source. The necessary pull-up and pull-down voltages to accommodate the
open-collector sources are handled within the L-Series actuator. Nominally, the
frequency of PWM is 1 kHz, but it will handle the full range of 300 to 1500 Hz.
See Figure 3-5 below, which describes the possible input types and
configurations for the PWM input.
Mixture valve
- PWM or 0-5V analog signal (with RC filtering):
- EC36/12 (ign/5 logiclevel). Low current signal, do not load. (max: 1.1mA)
Alternatively:
- Or EC36/7 injch/1 (ez a kimenet külso felhúzót igényel, max 30V-ra mivel ez a kimenet csak földre húz).
- EC36/23 Flyback = +12V (or +24V) -ra is be kell kötni az induktív terhelés tápját, ha induktív terhelés van valamelyik injch-n (EC36/6,7,8,9,17,18,19,20) pl. mágnesszelep vagy gázinjektor
2nd RS232 for CRC protected special commands
2nd RS232TX (EC18/14)
2nd RS232RX (EC18/15)
GND
2nd RS232TX (EC18/6)
2nd RS232RX (EC18/12)
GND
- Modbus RTU 9600-38400(115200?),8n1 recommended, configurable up to 115200,8n1 (8e1 also possible, but rarely used)
- Modbus address configurable (2 in the examples: ALS_deactivation time=0.2 sec means modbus address=2)
Examples:
(02) 06 00 XX VV 00 (CRC CRC)
XX table:
- 0x31 iac forced pw = VV (IAC PWM output)
- 0x32 debug.enable_flags = VV ("mde02" also covers wbo2 sensor heatup before engine start ?)
- 0x33 debug.disable_flags = VV
- 0x34 debug.forced_boost_tgt = VV; boost target (2kPa)
- 0x35 lambda target = VV
- 0x36 engine.prohibit_status = VV (00: reenables everything ... 0x42 for IGN_PROHIBIT, 0x41 for INJ_PROHIBIT, 0x50 for FUELPUMP_PROHIBIT)
- other functions that should be available (if not covered by above):
- engine.prohibit_status ... _BV(IGN_PROHIBIT) preferrable also: _BV(INJ_PROHIBIT) _BV(STEPPER_PROHIBIT)
- Disable Fuel pump ... see prohibit above
read all runtime vars command
Example: (02) 44 (00 e3)
where 02 is modbus addr, and last 2 bytes is CRC. ('D'=0x44 is actual command)
Register/Address for reading/writing
read:
- lambda érték
- fojtó állás
- EGT1, EGT2
- knock values 0..7
- errors, trigger error (hibák)
- MAT manifold temp
- sparkadv gyújtásszög
- RPM (fordulatszám)
- lambda target
- individual power (gyújtás kihagyás)
- iac duty (fojtó parancsolt)
write:
- alap gyújtásszög
- lambda SP
- fojtó parancsolt
K-Thermocouple. Andor, Viktor, please fill in mcp3208 channel names from your paper, or device behavior
- EGT1 (mcp3208/4) used for EGT
- EGT2 (mcp3208/3) used for MAT
- EGT3 (mcp3208/..) used for (engine inlet water temperature)
- EGT4 (mcp3208/..) used for (engine outlet water temperature)
"analog inputs calibrated" can be used to show MAT, CLT-in and CLT-out values.
- CLT will be configured to 17 point curve, with -1Celsius starting point... That way it will measure CLT-out acquired from above mcp3208 channel, using egt1 calibration values.
WBO sensor connection
- 7 WBO2 Pump-
- 9 WBO2 Pump+
- 13 WBO2 Nerst signal
- 17 WBO2 Ground
- 18 WBO2 Heater
Digital inputs
- Generator mains paralell mode ON (1=GCB closed/0=GCB open)
- From Standby to ready to start (1=ready/0=standby)
Digital output
- ECU ok (1=ok/0=fail or not ready) (in stanby ECU this signal=0)
Knock sensor 1pcs.
- EC18/6 and GND
Base Config made; Configured for:
- 1.2.23 firmware
- trigger: 8-1 on cam, cheated cyl nr 8 instead of 4 for good rpm reading
- ignition outputs 2,3,6,7 (in that order)
- req_fuel of 16 msec
- safe defaults for all other settings
- TODO:
- setup firing order
- calibrate ignition
- check if selected injector outputs match wiring