In the breakdown of power supply system, accumulator builds Tie Duan to appear the occurence rate place that contacts undesirable breakdown holds proportion taller. When reason is undertaking the overhaul to power supply system, answer to eliminate accumulator to build Tie Duan to contact undesirable possibility first, this abecedarian must the convention with good nurturance.
01
Difficulty of corrective maintenance of power supply system
Examination of breakdown of the accumulator in power supply system is relatively easy, difficulty charges in what comprise by the alternator in systematic examination. If be below the condition that affirms accumulator is normal, car have more than is needed how long, accumulator can have a deficit report, criterion because charge,the problem is more the system is undesirable without the job or job those who cause, this kind of breakdown is very apparent, judgement is not difficult also, abecedarian must master this kind of method adroitly.
02
Common dynamo does not generate electricity breakdown diagnoses guidance of as solid as maintenance skill example
The fault rate in power supply system is higher is the dynamo does not generate electricity, cannot charge for accumulator, it is electricenergy production inadequacy next, both diagnosis and overhaul are very similar.
1.The type taking iron of electronic adjuster
Electronic voltage regulator is main iron is taken outside having model with inside take iron model two kinds big. It is between regulator of voltage of these two kinds of electrons cannot direct crossing-over uses, can create dynamo tension otherwise maladjusted or do not generate electricity.
(1) outside take following iron pictures (A) be shown, adjuster outfit is in electronic voltage dynamo excitation winding and take iron between, dynamo excitation winding did not build Tie Duan, by adjuster control excitation winding takes iron.
(2) inside take following iron pictures (B) be shown, adjuster outfit is in electronic voltage between dynamo and ignition switch, dynamo excitation winding has one aspect of the matter to take iron.
Dynamo of circuit of iron power supply is built not to generate electricity outside 2. breakdown is diagnosed with maintenance
Use detect the lamp detects this circuit does not generate electricity what following watches show the move of breakdown:
Dynamo of circuit of iron power supply is built not to generate electricity inside 3. breakdown is diagnosed with maintenance
Use detect the lamp detects this circuit does not generate electricity what following watches show the move of breakdown:
03
Without brush a dynamo not to generate electricity breakdown diagnoses guidance of as solid as maintenance skill example
Because do not have dynamo of the commutate that brush silicon to do not have brush and slip ring, reason won't wear away because of slip ring and brush, ablation cause excitation electric current flabby or do not generate electricity wait for breakdown, because this does not need to often be maintained, maintain, but when needing to be controlled in car travel 30000km or ravel the dynamo regularly overhaul, in order to ensure dynamo job is regular and on the safe side. Next graphs (A) be shown brush appearance of model of silicon commutate dynamo to not have.
Without model of dynamo of the commutate that brush silicon appearance and drive leather belt are checked
1.Charge indicator light often shines
Bring about without brush an alternator to charge the reason of breakdown of indicator light Chang Liang basically has the following sides: Without brush dynamo excitation winding to join the short circuit between iron or winding, the lead on column of neutral site wiring has line place; Charge demonstrative relay coil opens circuit, or contact oxidation appeared to contact undesirable phenomenon; The join lead of dynamo system and wiring column damage or undesirable wait. Provide check-up to measure a method to be as follows:
(1) detect lamp bond is in F of column of magnetic field wiring and build Tie Duan
When the overhaul, can detect with first lamp bond is in F of column of wiring of voltage regulator magnetic field and build Tie Duan, the lead observation that tears open F of next column of wiring of dynamo magnetic field to go up charges the circumstance of indicator light. If charge,indicator light goes out, it is dynamo breakdown, the likelihood joins iron or excitation winding short circuit for column of its F wiring. If charge,indicator light still shines, it is circuit breakdown, the lead that may be adjuster to go up to column of dynamo F wiring has the phenomenon that take iron to exist.
(2) detect lamp bond nods wiring in neuter column and build Tie Duan
The engine that start, will detect lamp bond nods wiring in dynamo neutral column and build Tie Duan, observation detects of the lamp illume circumstance. If detect,the lamp does not shine, tear open next dynamo neutral to nod the lead of N wiring column, observation detects the circumstance of the lamp: If detect,the lamp still does not shine, it is circuit breakdown, the likelihood is down-lead of dot of voltage regulator neutral have open circuit place to dynamo wiring column; If detect,the lamp can shine, it is voltage regulator breakdown, should undertake the overhaul to voltage regulator or change again new.
If detect,the lamp can shine, reoccupy detects column of wiring of dot of neutral of regulator of lamp examination voltage and the end that take iron, observation detects lamp circumstance: If detect,the lamp does not shine, it is dynamo breakdown, the likelihood nods jumper and open circuit of its wiring column for neuter; If detect,the lamp can shine, it is circuit breakdown, the likelihood nods jumper to arrive between dynamo wiring column for voltage regulator neutral have the appearance that take iron.
2. charges when shining when indicator light, destroy
Bring about without brush an alternator to charge when shining when indicator light, destroy the reason of breakdown basically has the following sides: The thermal stability of diode of dynamo silicon commutate becomes poor, concerned wiring column and insert receive a contact undesirable; Circuit has a problem, the lead contact that if charge,indicator light nods wiring column to go up to dynamo neutral is undesirable, about receive plug-in unit to have shake a phenomenon to wait.
When the overhaul, as above pursues (B) be shown, should check dynamo drive leather belt to have first without become loose (usable hand is among leather belt the position is pressed downward, if can press 20mm of below 10 ～ , criterion degree of tightness is spent appropriate) , affirm without by accident hind, dismantle the wire on column of next dynamo F wiring, with detect lamp join is in B+ and F wiring column two end, in driving a dynamo to enter the course that middling speed runs when engine, observation charges the working circumstance of indicator light. It is normal that if charge,indicator light works, overhaul voltage regulator or wirning harness. If charge,destroy, criterion breakdown reason has the following two respects: Dynamo breakdown, the likelihood is character of silicon commutate diode becomes poor, contact of the lead on column of wiring of dynamo neutral dot is undesirable wait; Circuit breakdown, the likelihood has lead to contact undesirable, insert receive become loose wait for a circumstance.
The lead on column of wiring of 3. armature B+ is burned-out
Bring about without brush column of wiring of dynamo armature B+ to arrive starter " batteries " the reason with the burned-out lead on wiring column basically has the following sides: Circuit respect breakdown, if wirning harness is blocked by the line,worn-out, wiring harness installs burr the lead on column of wiring of B+ of armature of undeserved, dynamo meets the place engine exhaust manifold; Dynamo itself breakdown, if column of armature B+ wiring builds diode of iron, commutate,be waited for badly by leakage of electricity of puncture short circuit, concerned place.
(1) the examination of dynamo respect
Following graphs (A) be shown, when the overhaul, next detachable generating electricity the lead on column of wiring of Electromechanical center B+ , between accumulator anode and column of dynamo B+ wiring join detects only the lamp, observe next detect the glow circumstance of the lamp: If detect the light is tiny bright, criterion breakdown may be character of leakage of electricity of column of armature B+ wiring or silicon commutate diode become poor to wait; If detect,the lamp illumes, criterion breakdown may be column of armature B+ wiring take iron or silicon commutate diode be waited for by puncture short circuit.
The lead on column of armature B+ wiring is burned-out breakdown detects
(2) the examination of circuit respect
As above pursues (B) be shown, when the overhaul, involve battery main switch or the contact of positive electrode cable that tear open next accumulator first, dismantle the wire on column of next dynamo B+ wiring, string together between connect of accumulator anode cable and column of accumulator anode wiring receive to detect the lamp, if detect,the lamp illumes, show circuit existence trouble, the likelihood is a dynamo to starter " batteries " the lead between wiring column has the place that takes iron, or in starter " batteries " wiring column lead and power source, start the front line that reach a point there is the appearance that take iron between Shu Mou switch.
