CN102213140B - Repairing protection circuit of engine - Google Patents
Repairing protection circuit of engine Download PDFInfo
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- CN102213140B CN102213140B CN201110129201A CN201110129201A CN102213140B CN 102213140 B CN102213140 B CN 102213140B CN 201110129201 A CN201110129201 A CN 201110129201A CN 201110129201 A CN201110129201 A CN 201110129201A CN 102213140 B CN102213140 B CN 102213140B
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- starting
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- switching relay
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- engine
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Abstract
The invention discloses a repairing protection circuit of an engine. By the circuit, the automatic switching of front and back starting states of the engine can be realized without manual setting. The repairing protection circuit of the engine comprises a front starting button, a back starting button, a starting relay, a starting motor, a switching relay and a travel switch, wherein a starting trigger end of the starting motor is connected with an anode of a power supply by a normally open contact group of the starting relay; a control end of the switching relay is connected with the anode of the power supply; respective grounding ends of the starting relay and the starting motor are connected with a cathode of the power supply; stirring contacts of the switching relay are connected with the control end of the starting relay; normally open contacts of the switching relay are connected with the anode of the power supply by the back starting button; normally closed contacts of the switching relay are connected with the anode of the power supply by the front starting button; and the grounding end of the switching relay is connected with the cathode of the power supply by the travel switch. In the repairing protection circuit of the engine, by arranging the travel switch which is used for detecting the opening and closing of an engine compartment door, the engine is in a normal starting state.
Description
Technical field
The present invention relates to the motor of automobile, refer more particularly to the maintenance protective circuit of motor.
Background technique
Mostly modern bus is rear engine vehicle, for ease of the maintenance to rear engine, all is provided with the back in the engine compartment and starts blanket, is convenient to the maintenance man and when motor has fault, overhauls use.Start diverter switch before and after all being provided with on the general apparatus for examination and repair, starting state after when the maintenance man is overhauling motor, need diverter switch being switched to, operator cabin personnel misoperation enable switch before preventing causes the unexpected injury to the maintenance man.The apparatus for examination and repair that has even be provided with key formula rotary switch can better have been protected maintenance safety as key is just pulled out.But sometimes the maintainer forgets that switch is switched setting perhaps to be pulled out key, if misoperation at this moment just might damage the person owing to be busy with maintenance.
Summary of the invention
Technical problem to be solved by this invention is: a kind of artificial maintenance protective circuit that the motor of the automatic conversion that just can realize motor front and back starting state is set that do not need is provided.
In order to solve the problems of the technologies described above; The technological scheme that the present invention adopted is: the maintenance protective circuit of motor; Comprise: forward and backward startup knob, starting relay, starting motor, switching relay and the position limit switch that is used for the keying of detection of engine hatch door; The startup trigger end of starting motor links to each other with positive source through the normally opened contact group of starting relay, and the control end of switching relay links to each other with positive source, and starting relay all links to each other with power cathode with starting motor grounding end separately; The contact of stirring of switching relay links to each other with the control end of starting relay; The normally opened contact of switching relay links to each other with positive source through the back start button, and the normally-closed contact of switching relay links to each other with positive source through preceding start button, and the grounding end of switching relay links to each other with power cathode through position limit switch.
Described maintenance protective circuit also includes: transmission neutral switch, the contact of stirring of said switching relay links to each other with the control end of starting relay through transmission neutral switch.
Described position limit switch is contactless position limit switch.
The invention has the beneficial effects as follows: the present invention is through being provided for the position limit switch that the detection of engine hatch door opens and closes; Make when opening engine compartment door; Position limit switch is closed, and switching relay gets electric, and the normally-closed contact of switching relay breaks off; Normally opened contact is closed; Become the back and start thereby the starting state of motor started in the past, realized the automatic switchover of starting state, prevented effectively switch to be switched misoperation possibly damage the person under the situation that is provided with or key is pulled out forgetting.In addition, transmission neutral switch has been sealed in the control loop of starting relay, guaranteed that motor is in neutral state, made that maintenance is safer.In addition, the employing of contactless position limit switch has prolonged working life of position limit switch greatly.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1, back start button, 2, preceding start button, 3, transmission neutral switch, 4, switching relay, 5, starting relay, 6, position limit switch, 7, starting motor.
Embodiment
Below in conjunction with accompanying drawing, describe specific embodiments of the present invention in detail.
As shown in Figure 1; The maintenance protective circuit of motor according to the invention; Comprise: preceding startup knob 2, back start button 1, starting relay 5, starting motor 7 and switching relay 4, transmission neutral switch 3 and be used for the position limit switch 6 that the detection of engine hatch door opens and closes; The startup trigger end of starting motor 7 links to each other with positive source through the normally opened contact group of starting relay 5; The control end of switching relay 4 links to each other with positive source; Starting relay 5 all links to each other with power cathode with starting motor 7 grounding end separately, and the contact of stirring of switching relay 4 links to each other with the control end of starting relay 5 through transmission neutral switch 3, and the normally opened contact of switching relay 4 links to each other with positive source through back start button 1; The normally-closed contact of switching relay 4 links to each other with positive source through preceding start button 2, and the grounding end of switching relay 4 links to each other with power cathode through position limit switch 6.Described position limit switch 6 is contactless position limit switch, and what select for use in the present embodiment is the photoelectricity non-contact switch, and its model is PK8-2C.
Working procedure of the present invention is: at first, when gearbox must be in neutral state, transmission neutral switch 3 closures, starting relay 5 gets the electrician and does, just can ato unit.When engine compartment door was closed, position limit switch 6 broke off, switching relay 4 dead electricity, the normally-closed contact of switching relay 4 with stir make contact, at this moment, can be through start button 2 normal ato units before pressing; And open after the engine compartment door, position limit switch 6 closures, switching relay 4; The normally opened contact of switching relay 4 with stir make contact; The preceding loop that starts is cut off, and at this moment, just can overhaul motor; In maintenance process, can be through pressing back start button 1 ato unit.
Claims (2)
1. the maintenance protective circuit of motor; Comprise: forward and backward startup knob (2,1), starting relay (5), starting motor (7) and switching relay (4); The startup trigger end of starting motor (7) links to each other with positive source through the normally opened contact group of starting relay (5); The control end of switching relay (4) links to each other with positive source; Starting relay (5) all links to each other with power cathode with starting motor (7) grounding end separately; It is characterized in that: this maintenance protective circuit also includes and is used for the position limit switch (6) that the detection of engine hatch door opens and closes, and the contact of stirring of said switching relay (4) links to each other with the control end of starting relay (5), and the normally opened contact of switching relay (4) links to each other with positive source through back start button (1); The normally-closed contact of switching relay (4) links to each other with positive source through preceding start button (2); The grounding end of switching relay (4) links to each other with power cathode through position limit switch (6), and this maintenance protective circuit also includes transmission neutral switch (3), and the contact of stirring of said switching relay (4) links to each other with the control end of starting relay (5) through transmission neutral switch (3).
2. maintenance protective circuit according to claim 1 is characterized in that: described position limit switch (6) is contactless position limit switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110129201A CN102213140B (en) | 2011-05-18 | 2011-05-18 | Repairing protection circuit of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110129201A CN102213140B (en) | 2011-05-18 | 2011-05-18 | Repairing protection circuit of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102213140A CN102213140A (en) | 2011-10-12 |
| CN102213140B true CN102213140B (en) | 2012-10-03 |
Family
ID=44744631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110129201A Active CN102213140B (en) | 2011-05-18 | 2011-05-18 | Repairing protection circuit of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102213140B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110962594A (en) * | 2019-12-12 | 2020-04-07 | 安徽安凯汽车股份有限公司 | Bus safety control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179920A (en) * | 1992-03-12 | 1993-01-19 | Navistar International Transportation Corp. | Circuit for automatic shut-down of electronically controlled diesel engine |
| TW200846547A (en) * | 2007-05-23 | 2008-12-01 | Sanyang Industry Co Ltd | Engine start apparatus |
| CN202125353U (en) * | 2011-05-18 | 2012-01-25 | 江苏友谊汽车有限公司 | Overhauling protection circuit for engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62152946A (en) * | 1985-12-26 | 1987-07-07 | Niles Parts Co Ltd | Data protection circuit for automobile arithmetic unit |
| JPH0560025A (en) * | 1991-08-30 | 1993-03-09 | Toyota Autom Loom Works Ltd | Engine protection device for industrial vehicle |
-
2011
- 2011-05-18 CN CN201110129201A patent/CN102213140B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5179920A (en) * | 1992-03-12 | 1993-01-19 | Navistar International Transportation Corp. | Circuit for automatic shut-down of electronically controlled diesel engine |
| TW200846547A (en) * | 2007-05-23 | 2008-12-01 | Sanyang Industry Co Ltd | Engine start apparatus |
| CN202125353U (en) * | 2011-05-18 | 2012-01-25 | 江苏友谊汽车有限公司 | Overhauling protection circuit for engine |
Non-Patent Citations (3)
| Title |
|---|
| JP昭62-152946A 1987.07.07 |
| JP特开平5-60025A 1993.03.09 |
| 周敦杰.后置式发动机起动保护电路原理.《汽车电器》.2000,(第2期), * |
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| Publication number | Publication date |
|---|---|
| CN102213140A (en) | 2011-10-12 |
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