اخى العزيز
فى بلاد كثيرة معندهاش بنزين 92
عندهم 87 89 91 و 93
و كنت قد اوضحت هذا فى احد افلام ال youtube
octane rating explained3-
http://www.nilemotors.net/Nile/43251...post3875762754
اما عن الفرق بي 92 و 93 (بنزين خالى من الرصااص unleaded) فهو 1% كنسبة خليط المكونات و ﻻ يحدث كل هذه المشاكل.
فربما كما تقول يكون تعديل ال ECU هو اسرع و امثل حل .
لكن
Programmable ecu vs. non-programmable ecu.
Most Engine Management System’s fitted to production vehicles are not programmable, that is to say that the maps within the Engine Management System which determine the fuelling and ignition settings are fixed and cannot be varied by the owner. This makes good sense from a manufacturers point of view since the engine then runs within the permitted parameters which keeps the engine emissions and economy within known limits.
There is a burgeoning market for “chip tuning” where the chip containing the maps is replaced by another which has revised map settings providing better performance from the engine, the gains to be had here are fairly small except with turbo-charged engines where the EMS controls the boost. Chip changes on these engines can yield quite large increases in engine power. Some manufacturers go to great lengths to stop after market tuners from decoding the maps within their Engine Management System with varying degrees of success. Notable EMS which are difficult if not impossible to “chip” are the Rover MEMS and the Ford EECIV system.
All after-market Engine Management System are programmable since they have to be fitted to a variety of different engine installations in a variety of states of tune. If the map values could not be changed then the EMS would be useless for after market applications. Some manufacturers of these systems discourage home mapping and will only allow authorised dealers to undertake the mapping.
For clarity sake we will examine each of the two sub-systems within an Engine Management System separately, in practice there is a great deal of interaction between the two, both systems will utilize information from the various engine sensors.
المفضلات