What it means for the car driver is that the ECM controls how the car engine runs, or more accurately how much the throttle valve opens, without full regard for the driver's commands issued through the throttle pedal.
This issue is caused by what one major car maker describes as "non-linear throttle control". It is worth noting that ECM control of the combustion process has brought motorists many benefits (cheaper unit cost, lower emissions, reduced fuel consumption, improved driveability, no need for regular tune ups and improved reliability, to name just a few) but it also gave rise to features like the rev hang.
ECM TITANIUM ALL DRIVERS CODE
spring to mind, but there are many others) and ECM program code is complex, proprietary and generally kept secret. Specialist electronics companies usually build ECMs for world car makers (European Bosch and Siemens and Japanese Denso and Mitsubishi Electric Co. These days car ECMs are even coded to individual vehicles by their VINs (vehicle identification numbers) and this makes them non-transferable between vehicles. Typically, a car ECM is suitable for just one particular car make, type, model and variant. Unlike PC software, the code in ECM is written by its designers just for that ECM version.
ECM TITANIUM ALL DRIVERS SOFTWARE
Now it is much easier for car designers to control many aspects of EFI (electronically fuel injected) engine operation, including prevention of sudden drop in engine speed by embedded software control. It was before cars with fuel injected engines became common. It is a known fact that NOx tend to rise with sudden leaning of fuel mixture as it happens when throttle is closed abruptly.Ĭar manufactures tried since late '70s of the last century to prevent such a condition by installing vacuum operated dashpots on carburetted cars just for the purpose of slowing down the closing of carburettor butterfly valve. When throttle is closed quickly, engine speed does not drop instantly but decays slowly due to artificial delay programmed in the engine control module (ECM) by car manufacturers.Ĭar makers are forced by legislation to build cars meeting ever tighter exhaust emission limits, typically defined in grams/km of test for HC (hydrocarbons), CO (carbon monoxide) and NOx (oxides of nitrogen). Rev hang is colloquial expression describing an undesirable characteristic of modern cars. 2011 Honda Civic Si (K20 engine) is covered here, 2007 Mazda 3 SP23 (元 engine) is covered here, 2012 Honda Accord Euro (K24 engine) is covered here and 2012 Toyota Yaris (1NZ engine ) is covered here.
The text is mostly the same but diagrams and videos refer to different car makes and models.
This website has been updated several times in recent months and there are 4 versions of it.
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