Description
ignition Timing Control:
The programmed ignition
employed in this engine provides optimum control of ignition timing by determining
the optimum timing using a microcomputer in response to engine speed and vacuum pressure in the intake manifold,
which are transmitted by signals from
sensor, throttle angle sensor, coolant temperature sensor and MAP
sensor. This system, not dependent on a governor or vacuum diaphragm, is capable of setting lead angles with compli-
cated characteristics which cannot be provided by conventional governors.
PGM-FI ECU
Battery voltage
Voltage compensation
Compensation
DIRECT
IGNITION
Current duration
SYSTEM
- - - - - - - -
MAP sensor
Thottle angle sensor
Compensation
Idling compensation
Igniter unit
I
I
I
I
I
Ignition coil
II
I
I
Spark plugs
I
Coolant temperature compensation
Coolant temperauture
sensor
Compensation at warm-up
Basic Control
Determination of ignition timing/current duration:
The control unit has stored within it the optimum basic ignition timing for operating conditions based upon engine speed
and intake manifold pressure. With compensation by signals from sensors, the system determines optimum timing for
ambient conditions and sends voltage pulses to the igniter unit.
Compensation of ignition timing:
Compensation Item
lding
Compensation at
warm-up
Related Sensor and Information
sensor
MAP sensor
Coolant temperature sensor
Coolant temperature
compensation
Coolant temperature sensor
Description
Ignition timing is controlled to the target speed
with compensation according to the idling speed.
Lag angle is adjusted in accordance with the
warming up conditions to bring about a good
balance between operating performance and
exhaust gas level.
Compensation for lead angle at low coolant
temperature and lag angle at high coolant
temperature.
Control at Start
Ignition timing is fixed at BTDC
for cranking. The cranking is detected by the CYL sensor (cranking revolution) and
starter signal.
23-89
Содержание Acura NSX 1991
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Страница 22: ...Special Tools Individual tool lists are located at the front of each section ...
Страница 23: ...Specifications Standards and Service Limits 3 2 Design Specifications 3 l 1 ...
Страница 39: ...Body Specifications m I 1 175 46 3 Unit mm in ...
Страница 40: ...Maintenance Lubrication Points 4 2 Maintenance Schedule 4 4 ...
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Страница 60: ...Engine Removal Installation ...
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Страница 162: ...Intake Manifold Exhaust System Intake Manifold 9 2 Exhaust Manifold 9 3 Exhaust Pipe and Muffler 9 4 ...
Страница 191: ... n EilEli3 A A A Cl51 c4 BLU 1 TACHO METER CONNECTOR Cl61 C478 C488 REDlYEL YELlRED J A GlOl ...
Страница 193: ... PGM FI 1 IDLE CONTROL 1 FUEL SUPPLY 1 EMISSION CONTROL II 17 ...
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Страница 482: ...Illustrated Index L Side Cover 14 100 ...
Страница 484: ...Illustrated Index Transmission Housing 14 102 ...
Страница 486: ...Illustrated Index Torque Converter Housing Valve Body ...
Страница 527: ...3 Assemble the transmission in the following numbered sequence Replace cont dl ...
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Страница 830: ...Types and Materials of Exterior Resin Parts Fuel filler lid HAS 2148 Gnylon PPO alloy Page 20 57 20 4 ...
Страница 876: ...UPPER FRAME Rear Bumper Disassembly BUMPER BEAM UPPER LICENSE PLATE SUPPORT SUMP R SKIRT 20 50 ...
Страница 888: ...Frame Repair Chart 20 62 ...
Страница 892: ...Heater Evaporator Door Position a C O L D KA type only VENT DOOR DEFROSTER EVAPORATOR HEATEd CORE CORE 22 4 ...
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Страница 1015: ...e RIGHT RETRACTOR SUB HARNESS I LEFT RETRACTOR SUB HARNESS I ...
Страница 1017: ...FLOOR WIRE HARNESS I Lx C 4 1 6 I C4b5 c 2 I LEFT KICK PANEL I I c422 C425 C424 C426 C423 I 0404 6701 kont d 23 31 ...
Страница 1019: ...C466 C465 C468 C464 c473 FLOOR WlFiE HARNESS co d 23 33 ...
Страница 1021: ... ITI RETRACTABLE HEADLIGHT CONTROL UNIT i FLOOR WIRE HARNESS 23 35 ...
Страница 1023: ...MAIN FUSE BOX I 23 37 ...
Страница 1027: ...DRIVER S DOOR WIRE HARNESS PASSENGER S DOOR WIRE 23 41 ...
Страница 1029: ...SRS CONTROL UN FUEL TANK WIRES 23 43 ...
Страница 1031: ... rl DRIVER S SEAT I DRIVER S POWER SEAT WIRE HARNESS PASSENGER S SEAT PASSENGER S POWER SEAT WIRE HARNESS 23 45 ...
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