Competition Engine Management Systems
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Competition Engine Management Systems |
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| The Very Latest from DTA |
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Feb 08 June 06 May 06 March 06 Feb 06 V40.00 Release:- Single and Twin VANOS Support V40.00 Release of the S series software and firmware adds the following abilities:- Single VANOS support for the BMW S50B30 engine using an S80. Full wiring instructions for crank and cam sensors as well as the cam actuation solenoids is on the wiring diagram. Twin VANOS support for the BMW S50B32 engine using an S100. A full map for this engine will be included in the software distribution soon. Special support for the Suzuki Hyabusa engine using existing 24 - 1 crank wheel. Sensor pin outs have been added to the wiring diagram. These new engine modes bring the total the S series supports to 19 besides the generic set up. 6 different types of variable cam shafts are now supported including BMW, Honda, Toyota, Rover and Ford ST170. All of these being complex multi-position systems. More will be added as soon as we can get test engines to verify each system in turn. V39.01 Release:- Various Enhancements V39.01 Release of the S series software and firmware adds the following abilities:- Improved starting of Honda K20A in very cold weather. Addition of Porsche 996 with 4 tooth cam target in the flywheel mode list. A generic CAN data stream for dashboards other than our own. Specification in the manuals section of this web-site. V38 Release:- Various Enhancements V38 Release of the S series software and firmware adds the following abilities:- Allow the VTEC control to use the shift light as output on the S40. Allow choice of tooth edge on the cam shafts of the Honda K20/K24 Modifications to the alternative ALS strategy when not using a valve Allow increase of idle valve PWM percentage when the cooling fan turns on Improvements to crankshaft oscilloscope Widen limits on throttle stop settings for marginal situations like the Suzuki Hyabusa Add fan switching in self test for the S40I V36 Release:- Measure Injector Dead Time and E85 Support V36 Release of the S series software and firmware adds the following abilities:- Injector dead time is the length of fuel pulse that must be given to an injector before any fuel delivery actually takes place. Below this time no fuel is delivered, above it injectors deliver fuel in a linear fashion with increasing pulse times. To measure it with great precision requires expensive injector testing equipment. The dead time varies with the injector design, fuel pressure, battery voltage and the detailed nature of the ECU injector switching circuitry. We have designed a means of getting a very good approximation to dead time for four stroke engines by automatically switching the engine between two and four stroke injection modes every five seconds. If the exhaust Lambda value stays the same while this is happening the injector dead time is right for that injector at the running voltage and fuel pressure. Accurate knowledge of dead time is important for all manifold pressure and air temperature compensations. Below are screen shots of the real time chart showing the instantaeous Lambda value of a correct and an incorrect dead time value on one of our test engines.  Incorrect Dead time ( = 0.7ms)  Correct dead Time ( = 1.15ms) E85 is a bio-fuel which contains a mix of petrol (gasolene) and ethanol. Nominally E85 is 15% petrol and 85% ethanol although this will vary with the time of year purchased and the differential rates evaporation from forecourt tanks. Petrol may also be added at any time to the vehicle tank. Because of these issues the ethanol percentage must be measured at all times the engine is running and fuelling and ignition advance adjusted to reflect this. We have implemented support for the GM ethanol sensor and will add more as soon as the technical information becomes available. In general injector and fuel pump capacity must be increased by up to 70% to guarantee the required fuel delivery is available. V35 Release:- Switch on Analogue 3 Function with MAP2 Switch V35 Release of the S series software and firmware adds the following abilities:- Only switch on Analogue 3 Function when MAP2 switch is on and above a certain throttle position. Turn off throttle transients when generating the base map. V33 Release:- Delayed Coil Per Plug Operation, VW 1.8T Sequential Support, Alternative ALS Strategy V33 Release of the S series software and firmware adds the following abilities:- For engines with inductive cam sensors that cannot be seen at cranking speed we have introduced the ability to run the engine in wasted spark, twin spark mode until a suitable RPM is reached, then seamlessly switch to handling the coils individually. A similar feature has long been available for sequential injection. Support for the four tooth cam sensor on VW and Audi 1.8T engines has been added, allowing the use of sequential injection and individual coil support without changing the cam disc. Note this only works on the variations of this engine with a hall effect cam sensor. Engines with an inductive cam sensor will need this changing to the hall effect item which is an identical physical size. An alternative anti lag feature is available when a valve cannot be fitted. This implements a low RPM limit when the throttle position is below a user defined value. If the engine would naturally idle at say 5000 rpm this will limit the speed when the throttle is closed artificially, providing higher manifold pressure when than would otherwise be the case. V32 Release:- Various Extensions V32 Release of the S series software and firmware adds the ability:- To use the ALS output instead of Aux3 for VTEC control Alter the cam advance control algorith for Honda, Toyota and Ford ST170 cam systems Add support for the Ford ST170 5 tooth cam signal Add support for the Ford Mustang 360 V8, 5 tooth cam pattern Add native support for two cylinder engines . V30 Release:- Idle Speed Increase During Air Conditioner Operation V30 Release of the S series software and firmware adds the ability to use the gear shift input to increase the idle base PWM increasing engine power at idle whilst the air conditioning compressor is working. See wiring diagram for implentation details. . V29 Release:- Support for 3 and 5 Cylinder Engines V29 Release of the S series software and firmware adds native support for three cylinder engines on an S60 and three and five cylinder engines on the S80/S100. An option to give out genuine three and five cylinder tachometer signals is also provided. S40 Starts Shipping
S80 Launch Goes Well S80 Starts Shipping in a Few
Days S60 V28.00 Release:- Many New
Additions Ability to run the crankshaft
oscilloscope while the engine is running. S60 V24.00 Release:-
Traction Control and Fuel Consumption Added V24.00 of the S60 Firmware
adds traction control and fuel consumption calculations. Traction control is implemented using a
wheel speed sensor on an undriven wheel and a gear dependent distance
table providing the raw data. A gearbox sensor must be fitted. The
aggression of the system, that is how much spark cut is implemented for
an amount of wheel spin can be either fixed in the map or controlled by
a potentiometer on the dashboard of the car. Fuel consumption in fuel used per hour
and MPG or L/100Km is calculated from the flow rate of the injectors.
DTASwin V23.03 Release:-
Cursor Added to Graphical Log Display V23.03 of the S60 PC software DTASwin
adds a cursor to the graphical log view to easily see the exact value
of the item at the cursor.
S60
V23.00 Release:- Idle Speed Control Using Ignition Advance V23.00 of the S60 Firmware allows the
use of ignition advance to control idle speed on vehicles where no idle
PWM valve is present and cannot be fitted. All features of the PWM
valve control are implemented but using advance as an alternative
control system. S60
V22.00 Release:- Real Time Turbo PWM adjustment Via Dyno Control
Box V22.00 of the S60 Firmware allows the
fuel knob of the dyno box to be used for setting the turbo control
valve PWM percentage. This is much quicker than typing numbers into the
map. When running the engine in closed loop fuelling the fuel knob is
redundant and it becomes available for the following functions. Turbo control valve PWM percentage. A variety of hot keys change the function of the knob during mapping. Pressing the enter button on the box logs the current active value in the relevant map.
A new option to switch to MAP2 on VTEC
activation is also added.
S60 V19.02 Release:- Honda CBR600 and Blackbird Support V19.02 of the S60 firmware now
implements support for the standard crank and cam sensors on Honda
CBR600 and the Honda "Blackbird" engines. These are late model engines,
originally on sequential injection, which have a twelve tooth crank
wheel and a 3 tooth cam wheel (pictured below). A map for a Formula
Student (SAE) engine is included in the software download but as these
engines use a 20mm inlet restrictor then it can only be used as a
starting point for a non restricted engine. As a matter of interest
this restricted engine made 85BHP at 11,000 RPM.
S60
V18.04 Release:- Rover K VVC Cam Control Support Added V18.04 of the S60 firmware now
implements cam control on a Rover K series VVC engine. A complete map
for a standard engine is included in the software download. This map
raised a standard (if tired 85,000 miles) engine from 109 BHP at the
wheels at 5500 RPM to 125 BHP at 6000 RPM. Peak at the wheels torque
went from 112 ft/lb at 5000 to 117 ft/lb at 4500. Injector duty cycle
is added as a loggable data option. S60
V17.08 Release:- Complete Lambda History of Current PC Session Available V17.08 of the DTASwin program now
stores the complete Lambda (Air/Fuel Ratio) history of the current PC
sesion. Average Lambda value in each cell is stored, The number of
records received for each cell and the software can calculate and apply
the difference between this and the Lambda target map. Pictures below
of Lambda history, count history and percentage differences from one of
our dyno sessions.
S60
V17.00 Release:- Support for Honda S2000 Engine, Suzuki GSXR1000 K5 map
included V17.01 of the S series software suite
adds support for all of the original sensors of the Honda F20C (S2000)
engine. A complete map for this 250 BHP engine is included in the
software download. Engine on the dyno below. A complete map for the
Suzuki GSXR1000 K5 and K6 is included in the software download.
S60
V16.00 Release:- Useability Improvements V16.03 of the S series software and
V16.00 of the firmware add some small useability improvements. Highly
visible flags are on screen when the PC map needs sending to the ECU,
current sensor selection buttons are "remembered" between sessions,
single button map saving and for long mapping sessions which stretch
overnight when the PC is switched off, the ability to save the "Traced
Cells" list ("Green Squares").
S60
V15.00 Release:- Cranking Oscilloscope V15.00 of the S series software and
firmware adds a very useful tool for people fitting the S60. It now has
a cranking "oscilloscope" built in to assist in determining the
crankshaft flywheel pattern and crank and cam sensor positions. Not all
modes are supported in automatic determination yet but the
visualisation of the pattern is a very useful aid. A Suzuki K5 bike
engine, Ford and an
Opel/Vauxhall cranking pattern are shown below. Note the Ford and the
Suzuki have a cam
sensor and the arrival time is marked. The Opel does not have a cam
sensor. The result gives two positions for a four cylinder as we cannot
determine which cylinder is number one, however, in the case of these
two engines the result is correctly determined to within the limits of
tooth resolution. To be sure about which is number 1 cylinder all you
have to do is remove all the other spark plugs before cranking. A side effect of this picture is that
you can compare cylinder compressions without using a compression
tester.
S60 V14.00 Release:- More Throttle
Transients, VTEC improvements V14.00 release of S series software and
firmware adds separate cold and hot throttle transient maps. User
selectable switch over temperature between maps is available. VTEC
control has been divorced from cam advance control so it can be used on
engines with only VTEC such as the S2000. Real
Time Cam Sweep From V13.00 The target cam advance
can be swept from our dyno control unit in real time when mapping.
Using the fuel running in closed loop Lambda (O2) control, the fuel
knob becomes available for other functions. Injector phasing and cam
angle sweep are good examples of when this can be extremely useful.
Real time chart of requested cam angle and resulting cam advance is
shown below.
The Honda K20A is now
programmed into the S60 from Version 13.00 of the software and firmware
(see downloads section). Using all the original cam, crank and engine
sensors an easy route to a fully adjustable system for this engine is
now available. A carefully constructed base map for a completely
standard engine is included in the software download. With this map a
standard engine made 195 BHP @ 7500 RPM (and still climbing at this
RPM!) at the wheels, assuming only 10% transmission loss that is 215BHP
at the flywheel with a
maximum of 166 ft/lb torque @ 4500 RPM and a very flat curve.
K20A2
used in our development, not in a Honda obviously!
Second Nissan Cam Sensor From
V12.00 Compatibilty with a
second Nissan 360 tooth cam sensor has been added to the S60 from
V12.00. This is used on Nissan engine code SR20DET and others in both
four and six cylinder versions.
The
S60PRO is undergoing rapid developments. Latest Version 11.00 of the
firmware and
software (available in the downloads section) adds an “Engine Use
Histogram”,
picture below. This provides a visualisation of engine history. Maximum
18 ½
hours in each “bin” with 1 second resolution. This is stored in FRAM is
not part of the normal logging.  Dealer Training
and Development Suite DTA
has installed a fully equipped dyno facility for dealer training.
Training is
available by appointment and we provide a suitable vehicle mounted on a
Rototest chassis dyno. Equipment on this engine enables us to
give full understanding of closed loop fuel control, autotune, idle
control and
the procedures for gaining maximum power as well as at the same time
meeting emissions regulations if required.  Nissan Camshaft Mounted Sensor System
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