Цитата:
Сообщение от 013
Последняя ссылка действительно то что надо, полезная и очень проста для понимания, приму на вооружение)
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Только обратите внимание на то, что там написано... Про то, что угол зажигания (из-за того, что датчики разные) "уползает"... И на оборотах, близких к отсечке эта разница достигает 3-4 градусов. Хотя на такие "мелочи" у нас вообще не принято внимание обращать... лишь-бы ехало
There is one aspect of using 1991-1992 sensors with a 1993+ engine control unit (ECU), or 1993+ sensors with a 1991-1992 ECU that must be considered. Brian Geddes and Matt Jannusch (on the Team3S email list) pointed out that the two different types of sensor have different latency. Latency is the amount of time it takes the sensor to respond to the optical disk or vane and send a voltage change to the ECU. The ECU is programmed to accomodate the sensor latency. As determined from the AEM standalone engine management calibrations, the latency for the 1991-1992 sensors is 50 microseconds (us), or 0.050 millisecond (ms). The 1993 sensors have a 130 us latency (0.130 ms). What this means is that if you install the 1991-1992 optical pickup sensor and use a 1993+ ECU there will be more ignition timing advance than the ECU wants. If using 1993+ Hall effect sensors with a 1991-1992 ECU, there will less timing advance than what the ECU has determined is correct for the engine operating conditions. The AEM software allows a user to adjust the latency for the different types of sensor to assure the actual timing advance matches programmed advance.
This latency difference in sensor types causes a few degrees difference in timing at high rpm. For example, at 7000 rpm, a single degree of crank rotation takes place in 0.0238 ms (23.8 us); 7000 rpm = ~116.667 rps ==> ~8.57 ms/rev = 0.0238 ms/degree. There is a difference of 80 us between the two types of sensor, leading to a 3 to 4 degree difference in timing.
, но 3-4 градуса не страшно для атмодвижка, да и до отсечки не постоянно же крутят, а так датчик детонации думаю поправит ситуацию если что
