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Engine mapping actual value

English translation: Engine Mapping a function of input sensors record reactionary variations to map engine requiremts

15:35 May 16, 2009
English language (monolingual) [PRO]
Tech/Engineering - Electronics / Elect Eng / From a list with short messages about motor parts
English term or phrase: Engine mapping actual value
Can somebody tell me what this phrase actually means? "Mapping" seems to refer to the picture of an engine. Thanks.
solejnicz
Netherlands
Local time: 02:58
Selected answer:Engine Mapping a function of input sensors record reactionary variations to map engine requiremts
Explanation:
Engine mapping, How it is achieved.
Map Sensor.
An engine is fitted with a MAP Sensor, which measures the Manifold Absolute pressure. The pressure in the engine. This map sensor gives a fairly accurate reading back to a ECU to enable the ECU to calculate the correct amount of fuel to be delivered to the engine. This sensor maps what you are doing to the throttle by a diaphragm and translates this into a micro signal for the cars onboard ECU.

The ECU does the mapping, and it does this by received information from several functions, like the Air Temperature sensor, oxygen sensor, the crank angle sensor and the Throttle position valve, and these are recorded. These are received through a bus connector at over 200 times a second and the ECU creates a micrograph and reads the map or the graph (where it is going) of what it needs to do, Ie: where to fire the spark, the opening time of the injector, the amount of fuel, the amount of exhaust gas to recycle all to provide power, economy and emission control.
The manifold Absolute pressure sensor (MAP) sensor is a main requirement in providing the micrograph for the engines ECU for calculations. I am not saying the others are less important, as without either of them in the loop, the engine will not function correctly or not at all.
Engine Mapping is a function of input sensors, which record reactionary variations to map engine output requirements, to enable engine driveability.
I hope this is clear.. I put a MAP sensor as a link to show you just one of the sensors used for engine mapping.
ECU.. Engine Control Unit


http://www.bosch.com.au/content/language1/html/4596.htm

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Note added at 9 hrs (2009-05-17 00:53:23 GMT)
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Further your note:
"characteristic diagrams for the fuel tank" is just "an example of a diagram of a typical fuel tank." Fuel tanks now-a-days are not just drums under the back seat, they have valves, return lines, impact resistant ribbing, special non-atmosphere venting caps, and so many pipes and fittings some of them look like spaghetti bowls.

--------------------------------------------------
Note added at 18 hrs (2009-05-17 10:21:57 GMT) Post-grading
--------------------------------------------------

Thank you
Selected response from:

Gary D
Local time: 10:58
Grading comment
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
3 +4Actual values from engine mapping - see below for definitions
Jack Doughty
5Engine Mapping a function of input sensors record reactionary variations to map engine requiremts
Gary D
3finding out (indicating) the type(layout) of engine's actual usability
Yasutomo Kanazawa
2Actual power output
Bashiqa


Discussion entries: 2





  

Answers


35 mins   confidence: Answerer confidence 2/5Answerer confidence 2/5
engine mapping actual value
Actual power output


Explanation:
Low confidence on account of scant info. Mapping actual values would incicate bench trials where actual values can be measured as opposed to theoretical figures.

Bashiqa
France
Local time: 02:58
Works in field
Native speaker of: Native in EnglishEnglish
Login to enter a peer comment (or grade)

39 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5
engine mapping actual value
finding out (indicating) the type(layout) of engine's actual usability


Explanation:
I think mapping here means finding out or indicating the type or layout of the engine's actual usability.

Yasutomo Kanazawa
Japan
Local time: 09:58
Works in field
Native speaker of: Native in JapaneseJapanese
PRO pts in category: 12
Login to enter a peer comment (or grade)

58 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +4
engine mapping actual value
Actual values from engine mapping - see below for definitions


Explanation:
Engine mapping is a process carried out in the auto industry with the aim of modelling engine outputs as functions of engine inputs; output variables are often torque and noxious emissions, while input variables include spark, rpm, load (fuel flow rate), airfuel ratio and exhaust gas recycling ratio. The work has required some novel modelling to recognise the data collection units as spark- sweeps. The objective is to provide results of optimum spark timing for the electronic engine controller, in order to ensure optimum fuel usage subject to constraints on exhaust emissions and exhaust temperature.
http://www2.warwick.ac.uk/fac/sci/statistics/staff/academic/...

OBD Engine mapping is the modern version of chipping. When you "chip" a car you basically put in a chip that has a set of data already burnt onto it, into your ECU. When you OBD remap an ECU, you save off the data currently stored on the chip and overwrite it with the performance data. This then allows you to apply different maps where applicable and also restore the original data should you require it. The benefit obviously of this is that it means you have not changed any standard part of the car and therefore warranty is unaffected etc.
http://www.angeltuning.co.uk/ai_faq.asp

Jack Doughty
United Kingdom
Local time: 01:58
Native speaker of: English
PRO pts in category: 16
Notes to answerer
Asker: Thanks a lot!


Peer comments on this answer (and responses from the answerer)
agree  Tony M: Brilliant!
54 mins
  -> Thank you, Tony!
agree  Gary D: Agree mostly, but spark fuel rate and others are outputs, chips change absolute inputs into false input signals so the ECU changes its caculations, usually to give more power or fuel efficency.
8 hrs
  -> Thank you.
agree  Phong Le
8 hrs
  -> Thank you.
agree  chaman4723
11 hrs
  -> Thank you.
Login to enter a peer comment (or grade)

9 hrs   confidence: Answerer confidence 5/5
engine mapping actual value
Engine Mapping a function of input sensors record reactionary variations to map engine requiremts


Explanation:
Engine mapping, How it is achieved.
Map Sensor.
An engine is fitted with a MAP Sensor, which measures the Manifold Absolute pressure. The pressure in the engine. This map sensor gives a fairly accurate reading back to a ECU to enable the ECU to calculate the correct amount of fuel to be delivered to the engine. This sensor maps what you are doing to the throttle by a diaphragm and translates this into a micro signal for the cars onboard ECU.

The ECU does the mapping, and it does this by received information from several functions, like the Air Temperature sensor, oxygen sensor, the crank angle sensor and the Throttle position valve, and these are recorded. These are received through a bus connector at over 200 times a second and the ECU creates a micrograph and reads the map or the graph (where it is going) of what it needs to do, Ie: where to fire the spark, the opening time of the injector, the amount of fuel, the amount of exhaust gas to recycle all to provide power, economy and emission control.
The manifold Absolute pressure sensor (MAP) sensor is a main requirement in providing the micrograph for the engines ECU for calculations. I am not saying the others are less important, as without either of them in the loop, the engine will not function correctly or not at all.
Engine Mapping is a function of input sensors, which record reactionary variations to map engine output requirements, to enable engine driveability.
I hope this is clear.. I put a MAP sensor as a link to show you just one of the sensors used for engine mapping.
ECU.. Engine Control Unit


http://www.bosch.com.au/content/language1/html/4596.htm

--------------------------------------------------
Note added at 9 hrs (2009-05-17 00:53:23 GMT)
--------------------------------------------------

Further your note:
"characteristic diagrams for the fuel tank" is just "an example of a diagram of a typical fuel tank." Fuel tanks now-a-days are not just drums under the back seat, they have valves, return lines, impact resistant ribbing, special non-atmosphere venting caps, and so many pipes and fittings some of them look like spaghetti bowls.

--------------------------------------------------
Note added at 18 hrs (2009-05-17 10:21:57 GMT) Post-grading
--------------------------------------------------

Thank you

Gary D
Local time: 10:58
Native speaker of: Native in EnglishEnglish
PRO pts in category: 28
Login to enter a peer comment (or grade)



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