CN106873483B - Preheating fault alarm system and control method - Google Patents
Preheating fault alarm system and control method Download PDFInfo
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- CN106873483B CN106873483B CN201710091811.0A CN201710091811A CN106873483B CN 106873483 B CN106873483 B CN 106873483B CN 201710091811 A CN201710091811 A CN 201710091811A CN 106873483 B CN106873483 B CN 106873483B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
A preheating fault alarm system comprises a power main switch S, a key switch SW, a preheating starting switch SW1 and a low-temperature electric heating switch SW2 which are arranged in a loop of a power supply and a starting motor M, and forms a graded power control logic, wherein: the power supply main switch S is used as a power supply main switch; the key switch SW is used as a power supply switch for starting the system; the preheating starting switch SW1 is used for preheating and starting and stopping the motor; the low-temperature electric heating switch SW2 is used for starting and stopping the electric heat source; and starting the starting motor when the preheating requirement is met. According to the preheating fault alarm system and the control method, the functions of the open circuit of the electric heating wire and the short circuit fault alarm of the air inlet preheating system are smoothly realized, and the possibility of sintering and breaking of the preheating heating wire caused by misoperation and the like is avoided. The potential safety hazard that the broken residues of the heating wire are sucked into the combustion chamber of the cylinder of the engine along with air is eliminated.
Description
Technical Field
The present invention relates to a signal control system and a control method thereof, and more particularly, to a signal control system and a control method thereof for a heating state.
Background
In order to ensure that the engine can be started quickly and smoothly under the extremely low temperature starting environment, an air inlet preheating system is required to be arranged on a chassis of the vehicle.
The system adds an electric heating mode in the air inlet channel. The device for heating the air in the air inlet channel by the electric heating plate and the electric heating wire additionally arranged in the air inlet channel consists of the electric heating plate, the heating wire and a control system, and has the characteristics of short heating time, high heating heat efficiency, simple structure, small influence on the air inlet of an engine and the like.
The problem that follows is that when the intake air preheating device is frequently used, or the vehicle is in a severe working environment, the vibration impact is large, and the long-time abnormal operation is caused by misoperation, the preheating electric heating wire is possibly sintered and broken. Once this occurs, the broken heating wire residue is sucked into the combustion chamber of the engine cylinder along with air, so that the engine cylinder is worn and the service life of the engine is affected.
Disclosure of Invention
The invention aims to provide a preheating fault alarm system and a control method, which are used for solving the technical problem that the abnormal working condition of a preheating system component cannot be sensed in time.
The preheating fault alarm system of the invention comprises a power supply main switch S, a key switch SW, a preheating starting switch SW1 and a low-temperature electric heating switch SW2 which are arranged in a loop of a power supply and a starting motor M, and forms a graded power control logic, wherein:
the power supply main switch S is used as a power supply main switch;
the key switch SW is used as a power supply switch for starting the system;
the preheating starting switch SW1 is used for preheating and starting and stopping the motor;
the low-temperature electric heating switch SW2 is used for starting and stopping the electric heat source;
and starting the starting motor when the preheating requirement is met.
The output end of the power supply is connected with the power signal input end of the starting motor M after being connected with the power supply main switch S in series; the output end of the power supply is connected with the main power switch S in series, then is connected with the fuse F and the key switch SW in series in sequence, then is connected with the contact a of the preheating starting switch SW1, the contact c of the preheating starting switch SW1 is connected with the control signal input end of the starting motor M, and the contact b of the preheating starting switch SW1 is connected with the low-temperature electric heating switch SW2 in series, then is connected with the fuse F and the glow plug which are connected in series in sequence. The glow plug operates when the contact a and the contact b of the warm-up start switch SW1 are turned on and the low temperature electric heating switch SW2 is closed, and the motor is started when the contact a, the contact b, and the contact c of the warm-up start switch SW1 are turned on.
A control relay K1, a main relay K2, a first failure alarm relay K3 and a second failure alarm relay K4 which comprise controlled circuits are arranged in a loop connecting a power supply and a starting motor M, the control relay K1 and the main relay K2 comprise normally open circuits, and the first failure alarm relay K3 and the second failure alarm relay K4 comprise normally closed circuits;
one end of a controlled circuit of the control relay K1 is connected with the low-temperature electric heating switch SW2, the other end of the controlled circuit is grounded, one end of a normally open circuit of the control relay K1 is connected with the power main switch S, the other end of the normally open circuit of the control relay K1 is connected with one end of a controlled circuit of the main relay K2, and the other end of the controlled circuit of the main relay K2 is grounded; one end of a normally open circuit of the main relay K2 is connected with a power supply main switch S, and the other end of the normally open circuit of the main relay K2 is connected with a fuse F and a glow plug which are sequentially connected in series; the controlled circuit of the first fault alarm relay K3 and one end of the normally closed circuit are connected with a key switch SW, the other end of the controlled circuit of the first fault alarm relay K3 is connected on a line between the normally open circuit of the main relay K2 and a glow plug, the other end of the normally closed circuit of the first fault alarm relay K3 is connected with one end of the normally closed circuit of the second fault alarm relay K4, the other end of the normally closed circuit of the second fault alarm relay K4 is connected with an alarm, one end of the controlled circuit of the second fault alarm relay K4 is connected with a low-temperature electric heating switch SW2, and the other end of the controlled circuit is grounded.
The control method of the preheating fault alarm system comprises the following steps:
the vehicle power supply main switch S is switched on, the vehicle key switch SW is switched on, the control switches and the relays are electrified, the first fault alarm relay K3 is switched on by a controlled circuit, the normally closed circuit is switched off, if the glow plug branch circuit has an open circuit fault, the controlled circuits of the first fault alarm relay K3 and the second fault alarm relay K4 are not electrified, the normally closed circuit maintains a passage, and the alarm rings.
The control method of the preheating fault alarm system comprises the following steps:
under the condition of no open circuit fault, the contact a and the contact b (preheating gear) of the low-temperature electric heating switch SW2 and the preheating starting switch SW1 are closed, the controlled circuit of the control relay K1 is conducted to enable the normally open circuit to be closed, the controlled circuit of the main relay K2 is further conducted, the normally open circuit of the main relay K2 is closed, and the heating plug is electrified to be normally heated. The controlled circuits of the first fault alarm relay K3 and the second fault alarm relay K4 are turned on, and the normally closed circuit is turned off.
The control method of the preheating fault alarm system comprises the following steps:
if meet heating plug circuit short circuit trouble in the heating process, the fuse on the circuit can fuse protection circuit rapidly, and the controlled circuit of first fault alarm relay K3 and second fault alarm relay K4 breaks off, and normally closed circuit closes, and the alarm rings.
The control method of the preheating fault alarm system comprises the following steps:
after the heating plug finishes heating air in the air inlet channel, the low-temperature electric heating switch SW2 is switched off, meanwhile, the first fault alarm relay K3 is used for detecting whether the circuit of the heating plug has an open circuit fault, if the circuit is open, the first fault alarm relay K3 connected with the corresponding circuit is switched off by the controlled circuit, the normally closed circuit is recovered, and the alarm sounds.
The preheating fault alarm system and the control method thereof are based on the common electric devices in the automobile industry, and through simple and effective circuit design, the functions of the air inlet preheating system such as the open circuit of the electric heating wire and the short circuit fault alarm are smoothly realized, and after the system is put into use along with the loading of an engine, the operation is convenient, the operation is reliable, the maintenance is easy, and good effect is achieved.
Drawings
Fig. 1 is a schematic circuit diagram of a preheat fault alarm system according to an embodiment of the present invention.
FIG. 2 is a signal determination flowchart of an embodiment of a preheat fault alarm system according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1, in the present embodiment, a main power switch S, a key switch SW, a warm-up start switch SW1, and a low-temperature electric heating switch SW2 are provided in a circuit connecting a power source (a battery) and a starter motor M.
The power main switch S is used as a power main switch, the key switch SW is used as a power supply switch of a starting system, the preheating starting switch SW1 is used for the preheating process and the starting and stopping process of motor starting, and the low-temperature electric heating switch SW2 is used for the starting and stopping process of an electric heat source (a glow plug). The switches form a hierarchical power control logic and start the starter motor when the preheating requirement is met.
In the specific connection, the output end of the power supply is connected with the power signal input end of the starting motor M after being connected with the power supply main switch S in series; the output end of the power supply is connected with the main power switch S in series, then is connected with the fuse F and the key switch SW in series in sequence, then is connected with the contact a of the preheating starting switch SW1, the contact c of the preheating starting switch SW1 is connected with the control signal input end of the starting motor M, and the contact b of the preheating starting switch SW1 is connected with the low-temperature electric heating switch SW2 in series, then is connected with the fuse F and the glow plug which are connected in series in sequence. The glow plug operates when the contact a and the contact b of the warm-up start switch SW1 are turned on and the low temperature electric heating switch SW2 is closed, and the motor is started when the contact a, the contact b, and the contact c of the warm-up start switch SW1 are turned on.
A control relay K1 containing a controlled circuit (generally comprising a controlled electromagnetic coil), a main relay K2, a first fault alarm relay K3 and a second fault alarm relay K4 are arranged in a loop connecting a power supply (a storage battery) and a starting motor M, the control relay K1 and the main relay K2 comprise normally open circuits (generally normally open contacts), and the first fault alarm relay K3 and the second fault alarm relay K4 comprise normally closed circuits (generally normally closed contacts).
One end of a controlled circuit of the control relay K1 is connected with the low-temperature electric heating switch SW2, the other end of the controlled circuit is grounded, one end of a normally open circuit of the control relay K1 is connected with the power main switch S, the other end of the normally open circuit of the control relay K1 is connected with one end of a controlled circuit of the main relay K2, and the other end of the controlled circuit of the main relay K2 is grounded; one end of a normally open circuit of the main relay K2 is connected with a power supply main switch S, and the other end of the normally open circuit of the main relay K2 is connected with a fuse F and a glow plug which are sequentially connected in series; the controlled circuit of the first fault alarm relay K3 and one end of the normally closed circuit are connected with a key switch SW, the other end of the controlled circuit of the first fault alarm relay K3 is connected on a line between the normally open circuit of the main relay K2 and a glow plug, the other end of the normally closed circuit of the first fault alarm relay K3 is connected with one end of the normally closed circuit of the second fault alarm relay K4, the other end of the normally closed circuit of the second fault alarm relay K4 is connected with an alarm, one end of the controlled circuit of the second fault alarm relay K4 is connected with a low-temperature electric heating switch SW2, and the other end of the controlled circuit is grounded.
As shown in fig. 2, in the control process in practical application, when the engine is started in an extremely low temperature environment and needs to be electrically heated for air intake and preheated, the vehicle power main switch S is firstly switched on, the vehicle key switch SW is switched on (each control switch and relay are powered on), the controlled circuit of the first fault alarm relay K3 is switched on, the normally closed circuit is switched off, if an open circuit fault exists in a glow plug branch, the controlled circuit of the first fault alarm relay K3 and the second fault alarm relay K4 is not powered on, the normally closed circuit maintains a passage, and the alarm sounds.
Under the condition of no open circuit fault, the contact a and the contact b (preheating gear) of the low-temperature electric heating switch SW2 and the preheating starting switch SW1 are closed, the controlled circuit of the control relay K1 is conducted to enable the normally open circuit to be closed, the controlled circuit of the main relay K2 is further conducted, the normally open circuit of the main relay K2 is closed, and the heating plug is electrified to be normally heated. The controlled circuits of the first fault alarm relay K3 and the second fault alarm relay K4 are turned on, and the normally closed circuit is turned off.
If meet heating plug circuit short circuit trouble in the heating process, the fuse on the circuit can fuse protection circuit rapidly, and the controlled circuit of first fault alarm relay K3 and second fault alarm relay K4 breaks off, and normally closed circuit closes, and the alarm rings.
After the heating plug finishes heating air in the air inlet channel, the low-temperature electric heating switch SW2 is switched off, meanwhile, the first fault alarm relay K3 is used for detecting whether the circuit of the heating plug has an open circuit fault, if the circuit is open, the first fault alarm relay K3 connected with the corresponding circuit is switched off by the controlled circuit, the normally closed circuit is recovered, and the alarm sounds.
The preheating fault alarm system is based on electric devices commonly used in the automobile industry, the functions of the air inlet preheating system such as the open circuit of an electric heating wire and the short circuit fault alarm are smoothly realized through simple and effective circuit design, and the system is convenient to operate, reliable to operate, easy to maintain and achieve good effects after being loaded and used along with an engine.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A preheating fault alarm system comprises a power main switch S, a key switch SW, a preheating starting switch SW1 and a low-temperature electric heating switch SW2 which are arranged in a loop of a power supply and a starting motor M, and forms a graded power control logic, wherein:
the power supply main switch S is used as a power supply main switch;
the key switch SW is used as a power supply switch for starting the system;
the preheating starting switch SW1 is used for preheating and starting and stopping the motor;
the low-temperature electric heating switch SW2 is used for starting and stopping the electric heat source;
starting the starting motor when the preheating requirement is met;
the output end of the power supply is connected with the power signal input end of the starting motor M after being connected with the power supply main switch S in series; the output end of the power supply is connected with a main power switch S in series, then is sequentially connected with a fuse F and a key switch SW in series and then is connected with a contact a of a preheating starting switch SW1, a contact c of a preheating starting switch SW1 is connected with the control signal input end of a starting motor M, and a contact b of a preheating starting switch SW1 is connected with a low-temperature electric heating switch SW2 in series and then is connected with the fuse F and a glow plug which are sequentially connected in series; the glow plug operates when the contact a and the contact b of the preheating starting switch SW1 are conducted and the low-temperature electric heating switch SW2 is closed, and the starting motor starts when the contact a, the contact b and the contact c of the preheating starting switch SW1 are conducted;
a control relay K1, a main relay K2, a first failure alarm relay K3 and a second failure alarm relay K4 which comprise controlled circuits are arranged in a loop connecting a power supply and a starting motor M, the control relay K1 and the main relay K2 comprise normally open circuits, and the first failure alarm relay K3 and the second failure alarm relay K4 comprise normally closed circuits;
one end of a controlled circuit of the control relay K1 is connected with the low-temperature electric heating switch SW2, the other end of the controlled circuit is grounded, one end of a normally open circuit of the control relay K1 is connected with the power main switch S, the other end of the normally open circuit of the control relay K1 is connected with one end of a controlled circuit of the main relay K2, and the other end of the controlled circuit of the main relay K2 is grounded; one end of a normally open circuit of the main relay K2 is connected with a power supply main switch S, and the other end of the normally open circuit of the main relay K2 is connected with a fuse F and a glow plug which are sequentially connected in series; the controlled circuit of the first fault alarm relay K3 and one end of the normally closed circuit are connected with a key switch SW, the other end of the controlled circuit of the first fault alarm relay K3 is connected on a line between the normally open circuit of the main relay K2 and a glow plug, the other end of the normally closed circuit of the first fault alarm relay K3 is connected with one end of the normally closed circuit of the second fault alarm relay K4, the other end of the normally closed circuit of the second fault alarm relay K4 is connected with an alarm, one end of the controlled circuit of the second fault alarm relay K4 is connected with a low-temperature electric heating switch SW2, and the other end of the controlled circuit is grounded.
2. The control method of the warm-up failure warning system according to claim 1, comprising:
the vehicle power supply main switch S is switched on, the vehicle key switch SW is switched on, the control switches and the relays are electrified, the first fault alarm relay K3 is switched on by a controlled circuit, the normally closed circuit is switched off, if the glow plug branch circuit has an open circuit fault, the controlled circuits of the first fault alarm relay K3 and the second fault alarm relay K4 are not electrified, the normally closed circuit maintains a passage, and the alarm rings.
3. The control method of the warm-up failure warning system according to claim 1, comprising:
under the condition of no open circuit fault, closing a contact a and a contact b (preheating gear) of a low-temperature electric heating switch SW2 and a preheating starting switch SW1, controlling the controlled circuit of a relay K1 to be conducted so as to close a normally open circuit, further conducting the controlled circuit of a main relay K2, closing the normally open circuit of the main relay K2, and enabling a heating plug to be electrified for normal heating; the controlled circuits of the first fault alarm relay K3 and the second fault alarm relay K4 are turned on, and the normally closed circuit is turned off.
4. The control method of the warm-up failure warning system according to claim 1, comprising:
if meet heating plug circuit short circuit trouble in the heating process, the fuse on the circuit can fuse protection circuit rapidly, and the controlled circuit of first fault alarm relay K3 and second fault alarm relay K4 breaks off, and normally closed circuit closes, and the alarm rings.
5. The control method of the warm-up failure warning system according to claim 1, comprising:
after the heating plug finishes heating air in the air inlet channel, the low-temperature electric heating switch SW2 is switched off, meanwhile, the first fault alarm relay K3 is used for detecting whether the circuit of the heating plug has an open circuit fault, if the circuit is open, the first fault alarm relay K3 connected with the corresponding circuit is switched off by the controlled circuit, the normally closed circuit is recovered, and the alarm sounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710091811.0A CN106873483B (en) | 2017-02-21 | 2017-02-21 | Preheating fault alarm system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710091811.0A CN106873483B (en) | 2017-02-21 | 2017-02-21 | Preheating fault alarm system and control method |
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| Publication Number | Publication Date |
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| CN106873483A CN106873483A (en) | 2017-06-20 |
| CN106873483B true CN106873483B (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710091811.0A Active CN106873483B (en) | 2017-02-21 | 2017-02-21 | Preheating fault alarm system and control method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919034A (en) * | 2018-08-01 | 2018-11-30 | 浙江方圆电气设备检测有限公司 | A kind of preheating conversion equipment and pilot system for photovoltaic fuse-link short-circuit test |
| CN110816446A (en) * | 2019-10-24 | 2020-02-21 | 湖南行必达网联科技有限公司 | Double-battery control system and fuel vehicle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979655A (en) * | 2012-11-23 | 2013-03-20 | 三一重机有限公司 | Preheating control system and engineering machinery |
| CN203747366U (en) * | 2014-01-27 | 2014-07-30 | 长城汽车股份有限公司 | Preheating relay |
| CN104948331A (en) * | 2015-06-29 | 2015-09-30 | 李欣 | Automobile preheating method and system |
-
2017
- 2017-02-21 CN CN201710091811.0A patent/CN106873483B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979655A (en) * | 2012-11-23 | 2013-03-20 | 三一重机有限公司 | Preheating control system and engineering machinery |
| CN203747366U (en) * | 2014-01-27 | 2014-07-30 | 长城汽车股份有限公司 | Preheating relay |
| CN104948331A (en) * | 2015-06-29 | 2015-09-30 | 李欣 | Automobile preheating method and system |
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| CN106873483A (en) | 2017-06-20 |
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