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2005년 2학기 기말고사 (자동차 전기)
아래 문제중 2개의 문제 출제.
1. 점화 장치의 시정수(T)에 대하여 설명하라.
2. 캠 샤프트 엥글센서(Cam shaft angle sensor)와 크랭크 샤프트 엥글센서(Crank Shaft Angle Sensor)가 점화장치에 어떠한 정보를 제공하는지 설명하라.
3. 교류 발전기(Alternator)에서 스테이터(Stator)와 로터(Rotor)의 역할에
대해 설명하라.
4. 점화장치(Ignition system)의 전체 회로를 그리고 각 부분의 역할에 대하여
설명하라.
단, 회로에는 Battery, IG switch, primary coil, secondary coil, igniter, distributor 그리고 spark plugs가 그려져야 한다.
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http://kr.blog.yahoo.com/rainwood65/trackback/3498524/1241135
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중간 고사 - 다음 5문제중 2문제 출제. (3, 4반 문제 상이)
1. Motor와 Alternator의 같은 점과 다른점을 설명하라.
2. 역기전력에 대하여 설명하라.
3. 직권 전동기와 분권전동기에 대하여 설명하라.
4, Starter의 Pull-in coil 과 Hold-in coil의 역할에 대하여 설명하라.
5. Battery의 한 cell의 비중과 그 전압과의 관계를 설명하라.
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http://kr.blog.yahoo.com/rainwood65/trackback/3498524/1241065
-
 김무스 2005.10.18 00:08 [61.77.237.224]
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잘 보고 갑니다~교수님~ㅋ
답글쓰기
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Function
When the switch is closed, current passes through the coil in the starter relay to ground and
makes contact (P2) in the starter relay.
After contact (P2) is made, the current passes through the contact to coils P and H.
The control piston then withdraws, causing the starter pinion to be forced out to engage with the
gear ring on the flywheel.
When coil (P) is energized, the rotor will begin to turn.
Once the pinion is fully meshed with the gear ring on the flywheel, the contact (P1) will be made. Current is then allowed to pass at full strength from the battery via the contact to the starter motor
and the rotor will turn as full speed.
When contact (P1) is made, coil P will have no current and the control piston will be held in place by coil H.
When the switch is open (once the engine has started), contact P2 will open and cause contact
P1 to open also. The starter motor is disengaged and stops.
The starter pinion is disengaged from the flywheel by the force of the return spring and the control piston in the engagement switch
1. Battery (24V)
2. Key switch
3. Thermal protection
4. Starter relay
5. Control relay
6. Coil P
7. Coil H
8. Starter motor
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http://kr.blog.yahoo.com/rainwood65/trackback/3498524/1241053
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Starter motor.
Design
The starter motor is a gear reduction motor with planetary gear of smooth starting type,
which means that it does not attain full power until the starter pinion is fully meshed with the
flywheel gear ring.
The pinion and gear ring can in this way be saved from damage and excessive wear.
With this type of starter motor, the ignition switch cannot convey current directly to the P-coil
because the current is too high.
For this reason, a starter relay is fitted to the starter motor on the control relay.
Other starter relay locations can occur.
The starter motor comprises the following main components/parts: rotor, stator coil, brush,
front and rear bearing housing, freewheel shaft, overrunning clutch, fork arm, starter pinion, ring
gear, planetary gear, control relay and starter relay.
The reduction mechanism comprises a ring gear, planetary gear and rotor gear.
The engagement mechanism comprises a control relay, starter pinion and a fork arm.
The front bearing housing is fitted with a sealing ring to prevent dust entering the starter motor.
Thermal protection is located in the brush retainer and breaks the ground connection to the starter relay.
1. Starter relay
2. Bolt for brush retainer
3. Brushes
4. Rear bearing housing
5. Control relay
6. Gasket
7. Washer
8. Fork arm
9. Overrunning clutch (disengage)
10. Drive shaft
11. Front bearing housing
12. Dust seal
13. Starter pinion spring
14. Starter pinion
15. Freewheel clutch (shaft)
16. Ball
17. Ring gear
18. Planetary gear
19. Gasket
20. Metal cover
21. O-ring
22. Rotor
23. Stator
24. O-ring
25. Through bolt
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http://kr.blog.yahoo.com/rainwood65/trackback/3498524/1241052
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순금 2005.10.10 14:35 [218.147.102.192]
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와.우~~
답글쓰기
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Maintenance-free battery with test indicator
The plates of these batteries are made up of a lead-calcium alloy. The batteries have, therefore,
purse-like separators (identical to the positive and negative plates placed in separate purses). In
batteries like these there is no need of space to accumulate the residues from the plates.
There is no need to fill this type of battery with electrolyte.
Some vehicles are provided with free-maintenance batteries.
Charge these only when necessary.
The test indicator assembled on the battery cap has a transparent rod dived in the electrolyte.
There is a “cage” fixed on the lower rod end, with a green ball inside it. As charge changes,
The green ball can move downwards or upwards within the “cage”. When battery charge is 65 %
or more, the green ball floats up, touching the rod edge. When looking at the test indicator,
a green point can be seen.
When battery load is below 65%, the green ball sinks in the electrolyte, and remains at the bottom of the “cage”. The test indicator gets a dark appearance, and the green point disappears.
If the level of electrolyte gets below the test indicator lower edge, the test indicator will get pale or
light yellow. Under normal conditions, the electrolyte level will only fall below the rod edge after
battery life-time end.
The abnormal conditions which can cause a premature electrolyte loss are:
Careless handling, with resulting cracking or breaking of the battery box, with consequent
electrolyte leakage.
Battery inclination above 45 degrees in either direction, provoking leakage through the vent hole.
Reloading high voltage caused by faulty loading system, thus resulting in overloading.
Overloading of an external re-loader.
Note: There is only one test indicator in each battery.
The indicator may show three different colors, which mean:
Green Battery load is above 65%.
Dark color - green point is not visible Battery load is below 65%, which means it must be
reloaded.
Light yellow The battery is totally unloaded (end of its life-time) or faulty (electrolyte leakage),
and must therefore be replaced.
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http://kr.blog.yahoo.com/rainwood65/trackback/3498524/1241016
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