Common Vehicles

[smitty124]

Hi Cali, I have an optra 5, which is somewhat of a sister car to the Daewoo Lacetti.

I had originally been using your predefined settings for that vehicle:

<vehicle id="Chevrolet-Lacetti-SX" make="Chevrolet" title="Lacetti-SX" year="2007" details="1.8l Delphi HV240">
<obd>
<engine>hobd.OBD2Engine</engine>
<engine-init>ATSP5; ATAL; ATSH8111F1; ATWM8111F13E</engine-init>
<sensors>hobd.OBD2Sensors</sensors>
<sensors>hobd.ELMSensors</sensors>
<sensors>ecuxml://ecu/delphi-mr240.ecuxml</sensors>
<sensors>hobd.InjectorSensors</sensors>
<sensors>hobd.CommonSensors</sensors>
</obd>
<injector-ccpm>97.5</injector-ccpm>
<tank>60</tank>
<liters>1.8</liters>
<cylinders>4</cylinders>
<volumetric-efficiency>75</volumetric-efficiency>
<weight>1200</weight>
<fuel-economy-reset-on-idle>true</fuel-economy-reset-on-idle>
<lph-filter-fss>true</lph-filter-fss>
<warning-coolanttemp>100</warning-coolanttemp>
</vehicle>


The fuel injector measurements were working etc, (and this is not a toyota) although the true gas consumption was underrated. Im wondering if I were to correct the values for the Optra 5, eg 2 litre displacement, D-TEC engine (opposed to 1.8), 55L tank, 1254kg weight, would this improve the accuracy of the gas readouts? Im also curious how you got the Volumetric efficiency for the Lacetti as well as the injector comp. I did speak to a technician at GM who did say the volumetric efficiency on the Optra should be 75. Although I had been using MAP sensors and needed to set it to 82 to get anything remotely accurate. They were unable to tell me the fuel injector settings however.

[cail]

Hi Smitty,

Normally all the extra parameters are none of importance for FE calculation.
Injector based calc. uses only pulse width, and RPM to calculate FE.
Both MAP and Injector constants were tuned up experimentally via calibration process.

For injector, you in theory can find partno of your injectors, then find similar injector replacement in f.e. bosch catalog, and there it has its performance numbers: http://www.bosch.com.au/content/language1/html/4554.htm