Automotive engine maintenance汽车发动机维护维修文档格式.docx
- 文档编号:17069021
- 上传时间:2022-11-28
- 格式:DOCX
- 页数:16
- 大小:20.53KB
Automotive engine maintenance汽车发动机维护维修文档格式.docx
《Automotive engine maintenance汽车发动机维护维修文档格式.docx》由会员分享,可在线阅读,更多相关《Automotive engine maintenance汽车发动机维护维修文档格式.docx(16页珍藏版)》请在冰豆网上搜索。
structure
product
123
Generatorregulatorsingleconnectiontripleconnection
Forexample,typeFT121regulators:
2.models,specificationsandapplicablemodelsofdomesticgeneratorregulators
Themodels,specificationsandapplicablemodelsofthedomesticdirectandalternatorregulatorsarelistedintable2-1-14,2-1-15and2-1-16.
Three.Theworkingprincipleofgeneratorregulator
1.workingprincipleofDCgeneratorregulator
DCgeneratorregulatortype,specifications,maintechnicalparametersandapplicablevehiclemodel2-1-14
living
yield
factory
Themainelectricalparametersofgroundtypesandspecificationsapplicablemodels
Voltage
(V)
Electriccurrent
(A)
Polarmodeclosingvoltage
Regulatingvoltage
Limitingcurrent
Reversecurrent
Note:
themodelinthetableisinaccordancewiththemodelofthefactorybeforetheenactmentofthestandardofonemachinedepartment.
AsshowninFig.2-1-18andFig.2-1-19,respectively,thevoltageregulatorstructureandthevoltagefluctuationcurveareshown.
Whenthegeneratordoesnotrotate,thecontactsremainclosedundertheactionofthespringtorque.
Whenthegeneratorturns,thereisacertainelectromotiveforceinthearmature,andthenthereisanelectriccurrentinthemagnetizingcoil,whichgenerateselectromagnetictorquetoattractthearmature,andtriestoseparatethecontacts.Butwhenthegeneratorspeedislow,duetothelowvoltage,electromagnetictorquegeneratedbythemagnetizingcoilisnotenoughtoovercomeantitorquespringtension,sothecontactsremainclosed,additionalresistanceR1isshortcircuited,theexcitationcircuitforgenerator
Generator,positivepole,contactpoint,armature,excitationwinding,generatornegativepole
1-core;
2-magneticyoke;
3-coil;
4-insulatingsheet;
5-staticcontactsupport6-;
staticcontact;
7-contact;
8-keeper;
9-diamagneticnail;
10-springhinge;
11-;
12-generatorload
3)theworkingprincipleofthecut-offrelay
Therelayclosurefunctioniswhenthegeneratorvoltageishigherthanthebatteryelectromotiveforce,automaticallyswitchonthecircuitbetweenthegeneratorandthebattery,whenthebatteryvoltageislowerthanthegeneratorelectricpotentialandcanautomaticallydisconnectthecircuitbetweenthetwo,topreventthebatterytodischargealargenumberofgenerators.
Thestructuraldiagramofthecut-offrelayisshowninfigure2-1-22.
Whenthegeneratordoesnotrotate,thecontactisopenedundertheactionofthespring,andthecircuitbetweenthegeneratorandtheaccumulatorisnotconnected.
Whenthegeneratorrotates,whenthevoltageisslightlyhigherthantheelectromotiveforceofthebattery,theelectromagnetictorqueoftheparallelcoilisenoughtoovercomethespringtorque,thecontactisclosed,andthecircuitbetweenthegeneratorandtheaccumulatorisconnected.Atthistime,thegeneratorchargesthebatteryandatthesametimeitsuppliespowertotheelectricalequipment
Figure2-1-18voltageregulator
1-ironcore;
2-yoke;
3-magnetizationcoil;
4-insulationpiece;
5-staticcontactbracket;
6-staticcontact;
10-hinge;
11-spring;
12-stent;
13-magneticshuntpiece
long
sand
steam
vehicle
electric
implement
424littletriad
424Alittletriad
424Blittletriad
424Clittletriad
Twelve
Twenty-four
Eighteen
Twenty
Fourteen
within
12.2to13.2
24.4to26.4
13.8to14.8
27.6to29.6
17~18
19~20
13~15
19~21
0.5to6
Liberation,leapforward,guise150,Gil164
BeijingBJ212,Orientalredcar,Volga
Belie,8M3,10M3,MDX44M
HongyanCQ261,GCH,TBO,15M2belier
upper
sea
handover
through
FT81
FT81A,FT81D,FT81E,FT81S,FT81T
Thirty-six
Thirteen
Twenty-five
.
13.8to14.6
17~19
34~38
12~14
23~27
0.5to5
Redflagcar
Shanghai58-1lighttruck
The200,210,theVolgaandBeijingBJ212
2135dieselengine
JN150,theYellowRiver,SriLanka
day
Tianjin
city
JT301
JT308
JT309
JT314
JT401
Twenty-one
Seventeen
+
-
14.8to15.5
16to17.5
Liberation,leapforward
SriLankacanreach706RBJ212
Thisis706ROXD250,J111Rautoaccessories
thelistmodelisusedinthefactorymodelbeforeJB1546-75.
AlternatorRegulatortype,specifications,maintechnicalparametersandapplicablevehiclemodel2-1-15
Modelspecification,mainelectricalparameter,applicablemodelandgenerator
power
(W)
Relay
Actionelectric
Press(V)
FT61
Threehundredandfifty
Fivehundred
13.2to14.2
Liberation,leapforward,Beijing,BJ212,Dongfeng
FT212
Twenty-eight
27~29
Allkindsof24Vcars
FT1221450013.5~14.5JF13,JF15seriesalternator,inaccordancewiththehair
W50L
FT61AFT70
FT70AFT111
FT211
FT121
FT221
十四
二十八
五百
4~5
8~10
—
13.8~14.5
27.6~29
13.8~14.8
27.6~29.6
13.5~14.5
27~29
柴油发动机,固定式发动机
jf01、jf11、jf21系列发电机
、jf22系列发电机JF12
、jf22、系列发电机JF12
天
津
汽
车
电
器
厂
6114350
13.5~14.5解放,跃进,东风140、BJ212
ft12114350
13.5~14.5jt130以及带充电指示灯的各种12
V汽车
ft21228350
27~29黄河以及各种24v汽车
ft22128350
27~29五十铃以及带充电指示灯的各种24
注:
表中部分型号系沿用一机部标准颁布前生产厂的型号。
汽车用发电机都配有调节器与其联合工作。
对于直流发电机,其调节器由电压调节器、电流限制器、截流继电器三部分组成,故又称三联调节器。
而交流发电机仅需电压调节器与其配合工作。
1)电压调节器的工作原理
电压调节器的功用是,当发动机转速发生变化时,自动调节发电机激磁电流,使其电压保持不变,以防电压过高损坏用电设备和使蓄电池过充电。
交流发电机晶体管调节器规格及性能表2-1-18
生
产
型号规格调节电压
(五)
配用发电机型号适用车型
电压
功率
上
海
交
通
jft103
jft106
jft204
jft207
28v
jft121
jft126
14v500jf15系列
jft244500jf25a24v系列交流发电机
jft241
jft246
1000272928v~jf28斯堪尼亚lt-110运
材车,奔驰2624牵
引车
表中型号系沿用一机部标准颁布前生产厂的型号。
图2-1-18、图2-1-19所示分别是电压调节器的结构及电压脉动曲线图。
当发电机未转动时,触点在弹簧力矩的作用下保持闭合。
当发电机转动时,在电枢中便产生一定的电动势,这时磁化线圈中就有电流通过,产生电磁力矩吸引衔铁,并力图使触点分开。
但当发电机转速较低时,由于电压较低,磁化线圈所产生的电磁力矩还不足以克服弹簧拉力的反力矩,故触点仍保持闭合,附加电阻R1被短路,此时发电机的激磁电路为
发电机正极→触点→衔铁→激磁绕组→发电机负极
1铁芯;
2磁轭;
3磁化线圈;
4绝缘片;
5静触点支架;
6静触点;
7动触点;
8衔铁;
9抗磁钉;
10铰链;
11弹簧;
12发电机负载
3)截流继电器的工作原理
截流继电器的功用是当发电机电压高于蓄电池电动势时,自动接通发电机与蓄电池之间的电路,而当发电机电压低于蓄电池电动势时又能自动截断两者之间的电路,
Topreventthebatteryfromdischargingalargeamountofelectricitytothegenerator.
Fig.2-1-19voltagefluctuationcurve
WhenthegeneratorspeedincreasesandthevoltageincreasestoacertainvalueofU2,becausetheelectromagnetictorqueofthecoreisgreaterthanthespringtorque,thearmatureissuckeddown,sothecontactissepa
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- Automotive engine maintenance汽车发动机维护维修 maintenance 汽车发动机 维护 维修