CN101780782B - Voltage-reduction protection device for passenger vehicle audio - Google Patents
Voltage-reduction protection device for passenger vehicle audio Download PDFInfo
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- CN101780782B CN101780782B CN2009102508417A CN200910250841A CN101780782B CN 101780782 B CN101780782 B CN 101780782B CN 2009102508417 A CN2009102508417 A CN 2009102508417A CN 200910250841 A CN200910250841 A CN 200910250841A CN 101780782 B CN101780782 B CN 101780782B
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- switch
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- vehicle audio
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Abstract
The invention discloses a voltage-reduction protection device for a passenger vehicle audio, which comprises a combined switch and a vehicle audio. The combined switch is provided with a 24V power supply end, a power supply switch group and a starting switch group, wherein a first end of the power supply switch group is connected with the 24V power supply end; and a second end of the power supply switch group is connected with a 24V power supply input end of a power supply voltage reducer. The voltage-reduction protection device for the passenger vehicle audio is characterized in that: a 12V direct-current output end of the power supply voltage reducer is connected with an audio protection circuit; and the audio protection circuit is connected with the vehicle audio. The voltage-reduction protection device for the passenger vehicle audio has the advantages of integrating the requirements for working power supply of a vehicle audio system and an electronic control unit (ECU) system of an engine, reasonably utilizing the effective resources of the power supply voltage reducer, supplying power to the electronic control unit (ECU) of the engine and the vehicle audio and reducing the cost, along with simple structure and low cost.
Description
Technical field
The invention belongs to the passenger vehicle power management techniques, specifically, is a kind of voltage-reduction protection device for passenger vehicle audio that is used to coordinate passenger coach load sound equipment power supply and engine electric-controlled ECU working power.
Background technology
After chaufeur starts automobile, often by the combined switch that is installed on the commutation post, carry out the work and the power supply supply of each onboard system, but because the working power of each onboard system has nothing in common with each other, just need carry out voltage-regulation to the output of combined switch, as shown in Figure 1: combined switch is provided with the 24V power end, the ignition lock group, the described 24V power end of first termination of ignition lock group wherein, second end of ignition lock group is connected the power supply reducing transformer, the 12V dc output end of this power supply reducing transformer is connected on the vehicle audio, and the 12V dc output end of this power supply reducing transformer is that vehicle audio is for 12V.The 3rd end of ignition lock group is controlled engine electric-controlled ECU work again, but because engine electric-controlled ECU only needs 12V, therefore, open between switches set and the engine electric-controlled ECU at logical ECU and connect another power supply reducing transformer again, could be engine electric-controlled ECU power supply.
When bus engine started, the starting current that needs was bigger, if the 24V power supply of storage battery output will influence engine starting simultaneously also to the vehicle audio power supply.And the moment behind engine starting but can produce rush current on circuit, burns out vehicle audio easily.
Such shortcoming is: two working powers require almost completely consistent onboard system, adopt an independently power supply reducing transformer separately, reasonably do not utilize the efficient resource of power supply reducing transformer, cause the wasting of resources, and existing power circuit does not have to guarantee that driving engine normally starts yet, and the rush current that can avoid the launched machine of vehicle audio to start the back generation again burns out.
Summary of the invention
The purpose of this invention is to provide a kind of voltage-reduction protection device for passenger vehicle audio; can comprehensive car audio system and the working power requirement of engine electric-controlled ECU system; can guarantee that driving engine normally starts, the rush current that can avoid the launched machine of vehicle audio to start the back generation again burns out.
For achieving the above object, the invention provides a kind of voltage-reduction protection device for passenger vehicle audio, comprise combined switch and vehicle audio, this combined switch is provided with 24V power end, combined switch and also is provided with source switch group, starting switch group, the described 24V power end of first termination of source switch group wherein, second end of source switch group is connected the 24V power input of power supply reducing transformer, its key is: the 12V dc output end of this power supply reducing transformer is connected with the sound equipment protective circuit, and this sound equipment protective circuit connects described vehicle audio;
Described sound equipment protective circuit is provided with protective relay, second end of the described starting switch group of one end string of this protective relay coil, the described 24V power end of first termination of this starting switch group, connect the 24V power end after this protective relay coil string starting switch group, the positive supply mouth of the other end sending and receiving motor of this protective relay coil, the 12V dc output end of the described power supply reducing transformer of one termination of this protective relay normally closed switch, the described vehicle audio of another termination of this protective relay normally closed switch;
The 12V dc output end of the described power supply reducing transformer of one termination of this protective relay normal open switch, ground connection behind the coil of the other end string ignition relay of this protective relay normal open switch;
The 3rd end of the described source switch group of one termination of described ignition relay normal open switch connects described 24V power end after the ignition relay normal open switch crosstalk source switch group, and the other end of ignition relay normal open switch is connected on the control end of starter motor.
Described combined switch also is provided with the ignition lock group, the described 24V power end of first termination of this ignition lock group, the 24V power input of the described power supply reducing transformer of second termination of ignition lock group, the front end of the 3rd termination power switching relay coil winding of ignition lock group, the rear end ground connection of this power transfer relay coil winding, the front end of this power transfer relay coil winding also connects the 3rd end of described starting switch group, the 12V dc output end of the described power supply reducing transformer of one termination of this power transfer relay normal open switch, the automatically controlled ECU of other end sending and receiving motivation of this power transfer relay normal open switch.
Start ignition key, after combined switch pushes power supply retaining, make the source switch winding of combined switch logical after, the 24V power input of power supply reducing transformer gets, the power supply reducing transformer drops to 12V with the 24V power supply, and at this moment, the power supply reducing transformer provides working power for vehicle audio separately.
After combined switch pushed the igniting retaining, source switch group and ignition lock group were all connected, and the 24V power input of power supply reducing transformer still has electricity, and vehicle audio continues to obtain working power, and simultaneously, the coil winding of power transfer relay also obtains the 24V power supply.The normal open switch closure of power transfer relay, engine electric-controlled ECU gets electric work.
Combined switch push start shelves after, source switch group, ignition lock group and starting switch group are all connected, the power supply reducing transformer continues as engine electric-controlled ECU power supply.Simultaneously; the protective relay coil gets; its normally closed switch disconnects, and the vehicle audio outage is protected the normal open switch closure of protective relay; the ignition relay coil gets; the normal open switch closure of ignition relay, this normal open switch make the 3rd termination of starter motor and source switch group logical, and starter motor obtains the 24V power initiation; engine starting, ignition key unclamps.
After ignition key unclamps, but this moment, driving engine drove the electrical generator rotation, and the positive supply mouth of electrical generator also generates the 24V power supply.Combined switch is got back to igniting retaining, power supply retaining from starting shelves, the unsettled power down of ignition relay coil, and its normally closed switch closure, vehicle audio gets electric reworking.
This circuit can guarantee that driving engine normally starts, and the rush current that can avoid the launched machine of vehicle audio to start the back generation again burns out.
The 24V direct current (DC) of combined switch output, be reduced to 12V by the power supply reducing transformer after, can power for vehicle audio, can after firing circuit is opened, be engine electric-controlled ECU power supply again.
Described power transfer relay is fixed on the power supply reducing transformer.
Described combined switch is installed in the top of passenger vehicle commutation post, and near bearing circle.
Shorten the electric wire that is connected between power transfer relay and the power supply reducing transformer, avoided too much complicated excessively wiring on the car, be convenient to vehicle maintenance.
Remarkable result of the present invention is: a kind of simple in structure, voltage-reduction protection device for passenger vehicle audio that cost is low is provided; can guarantee that driving engine normally starts; the rush current that can avoid the launched machine of vehicle audio to start the back generation again burns out; reasonably utilize the efficient resource of power supply reducing transformer; can comprehensive car audio system and the working power requirement of engine electric-controlled ECU system; be the power supply of engine electric-controlled ECU and vehicle audio simultaneously, reduced cost.
Description of drawings
Fig. 1 is the circuit connection diagram of prior art;
Fig. 2 is a circuit connection diagram of the present utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
As shown in Figure 2: a kind of voltage-reduction protection device for passenger vehicle audio, comprise combined switch and vehicle audio 3, this combined switch is provided with 24V power end, combined switch and also is provided with source switch group K1, starting switch group K3, the described 24V power end of first termination of source switch group K1 wherein, second end of source switch group K1 is connected the 24V power input of power supply reducing transformer 1, it is characterized in that: the 12V dc output end of this power supply reducing transformer 1 is connected with the sound equipment protective circuit, and this sound equipment protective circuit connects described vehicle audio 3;
Described sound equipment protective circuit is provided with protective relay J2, second end of the described starting switch group of the one end string K3 of this protective relay J2 coil, the described 24V power end of first termination of this starting switch group K3, connect the 24V power end behind this protective relay J2 coil string starting switch group K3, the positive supply mouth of the other end sending and receiving motor 2 of this protective relay J2 coil, the 12V dc output end of the described power supply reducing transformer 1 of one termination of this protective relay J2 normally closed switch, the described vehicle audio 3 of another termination of this protective relay J2 normally closed switch;
The 12V dc output end of the described power supply reducing transformer 1 of one termination of this protective relay J2 normal open switch, ground connection behind the coil of the other end string ignition relay J1 of this protective relay J2 normal open switch;
The 3rd end of the described source switch group of the one termination K1 of described ignition relay J1 normal open switch, connect described 24V power end behind the ignition relay J1 normal open switch crosstalk source switch group K1, the other end of ignition relay J1 normal open switch is connected on the control end of starter motor 4.
This circuit can guarantee that driving engine normally starts, and the rush current that can avoid the launched machine of vehicle audio to start the back generation again burns out.
Described combined switch also is provided with ignition lock group K2, the described 24V power end of first termination of this ignition lock group K2, the 24V power input of the described power supply reducing transformer 1 of second termination of ignition lock group K2, the front end of the 3rd termination power switching relay J3 coil winding of ignition lock group K2, the rear end ground connection of this power transfer relay J3 coil winding, the front end of this power transfer relay J3 coil winding also connects the 3rd end of described starting switch group K3, the 12V dc output end of the described power supply reducing transformer 1 of one termination of this power transfer relay J3 normal open switch, the automatically controlled ECU5 of other end sending and receiving motivation of this power transfer relay J3 normal open switch.
The 24V direct current (DC) of combined switch output, be reduced to 12V by power supply reducing transformer 1 after, can be vehicle audio 3 power supplies, can after firing circuit is opened, be engine electric-controlled ECU5 power supply again.
Described power transfer relay J3 is fixed on the power supply reducing transformer 1.
Described combined switch is installed in the top of passenger vehicle commutation post, and near bearing circle.
Shorten the electric wire that is connected between power transfer relay J3 and the power supply reducing transformer 1, avoided too much complicated excessively wiring on the car, be convenient to vehicle maintenance.
Its principle of work is: the 24V power end of combined switch receives the 24V direct supply that storage battery provides.
Start ignition key, after combined switch pushes power supply retaining, the source switch group K1 of combined switch is connected after, the 24V power input of power supply reducing transformer 1 gets, power supply reducing transformer 1 drops to 12V with the 24V power supply, and at this moment, power supply reducing transformer 1 provides working power for vehicle audio separately.
After combined switch pushes the igniting retaining, source switch group K1 and ignition lock group K2 connect, and the 24V power input of power supply reducing transformer 1 still has electricity, and vehicle audio continues to obtain working power, simultaneously, the coil winding of power transfer relay J3 also obtains the 24V power supply.The normal open switch closure of power transfer relay J3, engine electric-controlled ECU5 gets electric work.
Combined switch push start shelves after, source switch group K1, ignition lock group K2 and starting switch group K3 connect, power supply reducing transformer 1 continues as engine electric-controlled ECU5 power supply.Simultaneously; protective relay J2 coil gets; its normally closed switch disconnects, and the vehicle audio outage is protected the normal open switch closure of protective relay J2; ignition relay J1 coil gets; the normal open switch closure of ignition relay J1, this normal open switch make starter motor 4 logical with the 3rd termination of source switch group K1, and starter motor 4 obtains the 24V power initiation; engine starting, ignition key unclamps.
After ignition key unclamps, but this moment, driving engine drove electrical generator 2 rotations, and the positive supply mouth of electrical generator 2 also generates the 24V power supply.Combined switch is got back to igniting retaining, power supply retaining from starting shelves, the unsettled power down of ignition relay J1 coil, and its normally closed switch closure, vehicle audio gets electric reworking.
Claims (4)
1. voltage-reduction protection device for passenger vehicle audio, comprise combined switch and vehicle audio (3), this combined switch is provided with 24V power end, combined switch and also is provided with source switch group (K1), starting switch group (K3), the described 24V power end of first termination of source switch group (K1) wherein, second end of source switch group (K1) is connected the 24V power input of power supply reducing transformer (1), it is characterized in that: the 12V dc output end of this power supply reducing transformer (1) is connected with the sound equipment protective circuit, and this sound equipment protective circuit connects described vehicle audio (3);
Described sound equipment protective circuit is provided with protective relay (J2), second end of the described starting switch group of one end string (K3) of this protective relay (J2) coil, the described 24V power end of first termination of this starting switch group (K3), connect the 24V power end after this protective relay (J2) coil string starting switch group (K3), the positive supply mouth of the other end sending and receiving motor (2) of this protective relay (J2) coil, the 12V dc output end of the described power supply reducing transformer of one termination (1) of this protective relay (J2) normally closed switch, the described vehicle audio of another termination (3) of this protective relay (J2) normally closed switch;
The 12V dc output end of the described power supply reducing transformer of one termination (1) of this protective relay (J2) normal open switch, ground connection behind the coil of the other end string ignition relay (J1) of this protective relay (J2) normal open switch;
The 3rd end of the described source switch group of one termination (K1) of described ignition relay (J1) normal open switch, the other end of ignition relay (J1) normal open switch is connected on the control end of starter motor (4).
2. voltage-reduction protection device for passenger vehicle audio according to claim 1, it is characterized in that: described combined switch also is provided with the described 24V power end of first termination of ignition lock group (K2), this ignition lock group (K2), the 24V power input of the described power supply reducing transformer of second termination of ignition lock group (K2) (1), the front end of the 3rd termination power switching relay (J3) coil winding of ignition lock group (K2);
The rear end ground connection of this power transfer relay (J3) coil winding, the front end of this power transfer relay (J3) coil winding also connects the 3rd end of described starting switch group (K3), the 12V dc output end of the described power supply reducing transformer of one termination (1) of this power transfer relay (J3) normal open switch, the automatically controlled ECU of other end sending and receiving motivation (5) of this power transfer relay (J3) normal open switch.
3. voltage-reduction protection device for passenger vehicle audio according to claim 2 is characterized in that: described power transfer relay (J3) is fixed on the power supply reducing transformer (1).
4. voltage-reduction protection device for passenger vehicle audio according to claim 1 is characterized in that: described combined switch is installed in the top of passenger vehicle commutation post, and near bearing circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102508417A CN101780782B (en) | 2009-12-30 | 2009-12-30 | Voltage-reduction protection device for passenger vehicle audio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102508417A CN101780782B (en) | 2009-12-30 | 2009-12-30 | Voltage-reduction protection device for passenger vehicle audio |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101780782A CN101780782A (en) | 2010-07-21 |
| CN101780782B true CN101780782B (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102508417A Expired - Fee Related CN101780782B (en) | 2009-12-30 | 2009-12-30 | Voltage-reduction protection device for passenger vehicle audio |
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| CN (1) | CN101780782B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9694769B2 (en) * | 2013-06-21 | 2017-07-04 | GM Global Technology Operations LLC | Smart power distribution unit |
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2009
- 2009-12-30 CN CN2009102508417A patent/CN101780782B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101780782A (en) | 2010-07-21 |
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Granted publication date: 20110629 Termination date: 20191230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |