I'm curious what tricks car manufacturers use in their engine management, and who makes the best / most advanced.
I drive a Saab 9-5. Although the car is 16 years old, I'm really impressed with the Trionic engine management.
It is a 2.3l turbo, 5 speed manual. Drag coefficient is 0.29. CURB WEIGHT 3360 lbs.
With no modifications, & 190+k miles on the clock, it is averaging 34.1mpg. EPA 18/27 mpg. My commute is 28 miles each way.
(Once did 702 miles on one tank of fuel)
my Saab (Saab 9-5) | Fuelly
......9-5
From Eeuroparts tech corner:
"Trionic does things fundamentally differently. In combination with a critical component called a Direct Ignition Cassette, the computer is able to very precisely control everything that is going on with each individual cylinder and spark plug. The critical difference from a knock sensor is the system’s ability to detect the ionization in each cylinder and relay that info back to the computer individually.
To do this, the computer uses the DIC to send a signal between the spark plug electrodes to measure the electrical resistance of the air in between. Depending on how well the flame envelope is burned, and what is left over after the main combustion, the computer can deduce a lot. "
Tech Corner: SAAB Trionic and Ionization Sensing - eEuroparts.com Blog
Considering the age of my car, I figure there are better, more advanced systems in today's cars, at least until I hear someone talking about needing to replace knock sensors or cam sensors, and then I wonder
