LinkBack URL
About LinkBacks
Ответить с цитированием
Ты же сам написал - отсечка на 2.279 абсолютного давления... Мап, насколько мне известно, меряет абсолютное давление (которое по факту у тебя во впуске и присутствует... Турбина ж давление атмосферное не отменяет). Релэйтив (корректед) - это вычисляемый параметр... он равен Абсолют - Атмосферное давление. На некоторых моделях атмосферное давление меряется тоже мапом. На некоторых отдельным датчиком.
Чем отличается (и чем самое главное меряется Релейтив прешшуре) я пока сообразить не могу....
http://forums.nasioc.com/forums/archive ... 83627.html
Еще вот:
Q I’m trying to log boost but there are more than a few parameters for manifold pressure. Which do I choose?
Note: The ECU has no effective limit as far as storing manifold pressure. However, the ECU performs a narrowing conversion for the standard SSM parameters which results in these parameters having a limit in which higher values cannot be represented (the value will appear to be frozen at the limit during logging when manifold pressure exceeds the limit).
‘Manifold Absolute Pressure’ - this standard SSM parameter will read no higher than about 37 psia.
‘Manifold Relative Pressure’ - this standard SSM parameter is limited to about 18.4 psig regardless of atmospheric pressure.
‘Manifold Relative Pressure (Corrected)’ - This is a calculated parameter (still based on standard parameters) that is limited to about 22.3 psig at sea level. The actual limit will depend on the local atmospheric pressure (37psia - atmospheric pressure). For example, if atmospheric pressure is 13 psi, then this parameter would be limited to 24 psig (37psia - 13 psi = 24 psig).
‘Manifold Absolute Pressure (Direct)*’ - This extended parameter reads the manifold pressure value directly as used by the ECU. As such, it has no effective limit.
‘Manifold Relative Pressure (Direct)*’ - This extended parameter also has no effective limit. It is not the actual relative pressure, however. This parameter assumes sea level atmospheric pressure (14.7 psi). Although this will not match actual relative pressure if local atmospheric pressure is different from 14.7 psi, it will match the standard units ECU definitions in relation to relative manifold pressure (ex. Target Boost).
