Ignition System Changes in Ignition Systems1/4 1.Breaker points type Ignition switch Governoradvancer DistributorIG High-tension cord High-tension cord Sparkplug BreakerpointsCam Vacuum
Trang 1Ignition System Description
(1/2)
1.Powerful sparks/
2.Proper ignition timing/
3.Sufficient durability
Trang 2Ignition System Description
Spark plugSensors
: Secondary circuit: Primary circuit
Trang 3Ignition System Changes in Ignition Systems
(1/4)
1.Breaker points type
Ignition switch
Governoradvancer
DistributorIG
High-tension cord
High-tension cord
Sparkplug
BreakerpointsCam
Vacuum advancerResistor
ST
Ignitioncoil
Capasitor
Trang 4Ignition System Changes in Ignition Systems
SignalgeneratorVacuum advancer
Ignition coil
Igniter
Trang 5Ignition System Changes in Ignition Systems
ECU
Sensors
Ignitioncoil
Igniter
Transistor
Trang 6Ignition System Changes in Ignition Systems
High-tensioncode
Ignition coil(with igniter)
Ignition coil
Igniter
Ignitioncoil
Sparkplug
Trang 7Ignition System Necessity of Ignition Timing Control
Trang 8Ignition System Necessity of Ignition Timing Control
Trang 9Ignition System Necessity of Ignition Timing Control
Trang 10Ignition System Necessity of Ignition Timing Control
•Ignition timing
control
(2/3)BDC
TDC
Trang 11Ignition System Necessity of Ignition Timing Control
Flame propagation periodTiming advance
Crankshaft rotational angle
ESAGovernor advancer(2) BTDC10° ATDC10° (3) BTDC10° ATDC10°
High
Trang 12Ignition System Necessity of Ignition Timing Control
(2/3)
ECU
Ignition timingTiming that produces the maximum combustion forceBoundary between the ignition delay period and flame propagation speedIgnition delay period
Flame propagation periodTiming retard
Crankshaft rotational angle
HighEngine load Low
Trang 13Ignition System Necessity of Ignition Timing Control
Fuel consumptionrate
Retard
Knocking Large
(Engine load and engine speed are constant)
Trang 14Ignition System Description
ON
Trang 15Ignition Coil Operation of Ignition Coil
Primary coillgniter
igniter
Trang 16Ignition Coil Operation of Ignition Coil
Primary coillgniter
igniter
Trang 18Igniter Operation
(1/2)Primary voltage
Constant currentcontrol
Trang 19Igniter Operation
(1/2)Primary voltage
Constant currentcontrol
Trang 20Driver
IGF signalgenerationcircuit
IGT
IF1
IF2Primary current
Trang 21Spark Plug Description
(1/1)Ground electrode
Resistor
Center electrode
Terminal
Glass sealCorrugations
Insulator nose
Ceramic insulator
Copper core
CasingUpper stem
Gasket
Trang 22Spark Plug Ignition Mechanism
(1/1)
Trang 23Spark Plug Ignition Performance
Trang 24Spark Plug Heat Range
Range for cold plug
Hot plug
Cold plugSelf-cleaning temperature
Trang 25Spark Plug Heat Range
Trang 26Spark Plug Platinum/Iridium-tipped Plug
Platinum-tippedPlatinum-tipped
Trang 27Iridium-Spark Plug Platinum/Iridium-tipped Plug
(2/2)
Trang 28TDI (TOYOTA Direct Ignition System) Description
Spark plug
Crankshaft position sensor
Trang 29TDI (TOYOTA Direct Ignition System) Description
Trang 30TDI (TOYOTA Direct Ignition System) Components
1 Crankshaft position sensor
2 Camshaft position sensor
3 Knock sensor
4 Throttle position sensor
5 Air flow meter
6 Water temp sensor
7 Ignition coil with igniter
ECU
9 Spark plug
Trang 31TDI (TOYOTA Direct Ignition System) Components
2 Camshaft position sensor
3 Knock sensor
4 Throttle position sensor
5 Air flow meter
Trang 32TDI (TOYOTA Direct Ignition System) Components
Core
Plug cap
Trang 33TDI (TOYOTA Direct Ignition System) Operation
(1/1)
Crankshaft position sensor
Camshaft position sensor
Knock sensor
Throttleposition sensor
Airflow meter
Water temperature sensor
Trang 34Reference Operation Principle of the
Trang 35Reference Operation Principle of the
Trang 36Reference Operation Principle of the
Advance
Trang 37Reference Operation Principle of the Transistorized
Type with ESA
Trang 39Inspection Inspection
(2/3)
2.Check spark plug
Normal Carbon fouling
Oil fouling Overheating