Outline The Dwell Angle

Outline

The Dwell Angle

Relationship Between the dwel angle with the breaker contact slot

In conventional ignition systems that still use platinum (breaking point) there is a platinum slit that affects the size of the dwell angle. There are two commonly known angles on the vehicle especially on the ignition system, namely dweel angle and ignition angle. Then what is the understanding of these two angles? Here's an explanation:

Understanding of Ignition Angle

The ignition angle is the cam rotation angle of the distributor from when the platinum begins to open until it begins to open again on the next protrusion of the cam. Which is the angle of ignition is a blue angle.

Understanding the Dwell Angle

The dwell angle is the turning angle of the distributor cam formed at the time the platinum begins to close until it begins to open on the next bulge (red). The dwell angle can also be called the long angle of platinum closing or the length of the primary current flowing. Specifications dwell angle on the 4-cylinder engine is 52 plus minus 6 (toyota kijang). Here is a formula to calculate the dwell angle.

Following the speakers:

Contact The Breaker

Function:

to connect and break the current flowing to the primary coil, in order to occur induced voltage on the secondary coil.

Parts Of The Breaker Contact

1.      Kam distributor

2.      Fixed contact (tungsten)

3.      Contacts off (tungsten)

4.      The contact spring breaker

5.      Arm breaker contact

6.      Screw fastener

7.      An ebonite heel

8.      Cable (from coil)

9.      Setup

Small breaker contact gap

· Small opening angle (b)

· Large Dwel angle (a)

Large dwel angle -> small breaker contact latch

Large breaker contact gap

* Large opening angle (b)

* Small Dwel corner (a)

Small Dwel angle -> large breaker contact latch

Great Dwell angle and ignition capability

The ignition capability is determined by the strong primary current.

In order to achieve maximum primary current, a sufficient interruption is required.

Small dwell angle

Short shutdown contact closing time -> Primary current not reaching maximum -> Less ignition capability

•Large dwel angle

Good ignition capability, but the current flows too long * the breaker contacts become hot * the breaker breaks quickly wear out.

Conclusion: The dwel angle is a compromise between the ignition ability and the breaker contact life

Tools and materials:

O Fuller gauge

O Lock T 12 "

O Screwdriver - +

O Dwell tester

O Timing light

Setting the Platina Gap

1) Prepare tools and materials

2) Unscrew the distributor

3) Check for platinum slits, if burnt or hollow, platinum should be replaced

4) Platel slit and block gap block (platinum ebonite): 0.45mm

Installing Timing Light and Reading at Ignition

See flashing strobe lights on the coil / sign on the crankshaft pulley

Stel when ignition by rotating Distributor / Delco

Dwell Angle Examination

5) Check the dwell angle with the dwell tester

O dwell angle: 52⁰ ± 2⁰

6) Check the ignition time and set the engine rotation on idle rotation. The Octan selector must be set to the default position

O at ignition: at 750 + 50 rpm, 2K, 3K, 4K series; 8⁰ before TMA

7) Stel when ignition and match the time signs by rotating the body distributor

O when ignition machine series 2K, 3K, 4K: 8⁰ before TMA

8) Check the workings of the governor with the terms;

O the rotor must return shortly after the rotor is rotated clockwise and removed

9) Start the engine and remove the vacuum hose from the distributor. Time marks change according to the engine speed.

CONCLUSION

The dwel angle is the angle of the long platinum contact closing,

And corresponds to the breaker contact slot, Large Dwell angle and ignition capability for the engine to run with this ignition adapter