CONTROL SYSTEM [13B-MSP]
01-40–16
Air/fuel Ratio Control
x
Controls the fuel injection amount so that the actual air/fuel ratio is close to the target air/fuel ratio, to boost
purification of the catalytic converter.
x
air/fuel ratio feedback and target air/fuel ratio feedback are adopted for precise control of the air/fuel ratio.
x
The air/fuel ratio feedback compares the air/fuel ratio in the exhaust manifold detected by the A/F sensor and
the target air/fuel, and feeds back the air/fuel ratio difference to the final fuel pulse width (fuel injection amount).
x
The target air/fuel ratio feedback compares the air/fuel ratio in the catalytic converter detected by the HO2S
with the target air/fuel ratio and feeds back the air/fuel ratio difference to the stoichiometric air/fuel ratio (
O
= 1).
Due to this, the optimum target air/fuel ratio is determined.
x
Repeats feedback to the target air/fuel ratio and final fuel pulse width (fuel injection amount), and by constantly
calculating the optimum target air/fuel ratio and final fuel pulse width, purification of the catalytic converter at a
high level has been achieved.
FINAL FUEL PULSE WIDTH
(FUEL INJECTION AMOUNT)
CORRE-
CTION
FUEL INJECTOR
A/F SENSOR
HO2S
CATALYTIC CONVERTER
ENGINE
PCM
TARGET AIR/
FUEL RATIO
FEEDBACK
COMPARING
AIR/FUEL
RATIO
FEEDBACK
ACTUAL
AIR/FUEL RATIO
ACTUAL
AIR/FUEL RATIO
STOICHIOMETRIC AIR/
FUEL RATIO (
dz㧧
1)
TARGET AIR-FUEL RATIO
COMPARING
dz
(lambda) = (actual air/fuel ratio) / (stoichiometric air/fuel ratio)
ar8uun00000195
Содержание 2009 RX-8
Страница 8: ......
Страница 14: ......
Страница 36: ......
Страница 52: ......
Страница 66: ......
Страница 70: ......
Страница 76: ......
Страница 106: ......
Страница 116: ......
Страница 124: ......
Страница 128: ......
Страница 142: ......
Страница 156: ......
Страница 175: ......
Страница 183: ......
Страница 201: ......
Страница 203: ......
Страница 213: ......
Страница 285: ......