CN101797906B - DC voltage reducing device - Google Patents
DC voltage reducing device Download PDFInfo
- Publication number
- CN101797906B CN101797906B CN2009102508402A CN200910250840A CN101797906B CN 101797906 B CN101797906 B CN 101797906B CN 2009102508402 A CN2009102508402 A CN 2009102508402A CN 200910250840 A CN200910250840 A CN 200910250840A CN 101797906 B CN101797906 B CN 101797906B
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- CN
- China
- Prior art keywords
- switch
- power supply
- ecu
- relay
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The invention discloses a DC voltage reducing device, which comprises a combined switch arranged on a reversing column, wherein the combined switch is provided with a 24V power supply end, a car audio switch, an ignition switch and an ECU start switch, one end of the car audio switch is connected with the 24V power supply end, the other end of the car radio switch is connected with a power supply voltage reducer, and the 12V DC output end of a power supply voltage reducer is connected with a car radio. The invention is characterized in that one end of the ignition switch is connected with the 24V power supply end, the other end of the ignition switch is connected with one end of the ECU start switch, the other end of the ECU start switch is grounded after being connected with a coil winding of a relay in series, one end of a normally open switch of the relay is connected with the 12 DC output end of the power supply voltage reducer, and the other end of the normally open switch is connected with an electronic control ECU of an engine. The invention has the advantages of simple structure and low cost, can integrate the requirements of working power supplies of a car audio system and the electronic control ECU of the engine, reasonably utilizes a power supply voltage reducer to reduce the voltage and avoids resource waste.
Description
Technical field
The invention belongs to the passenger vehicle power management techniques, specifically, is a kind of DC voltage reducing device 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 switching-over 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 VR to the output of combined switch, as shown in Figure 1: combined switch is provided with 24V power end, combined switch and also is provided with the wherein said 24V power end of a termination of vehicle audio switch of vehicle audio switch, and the other end of vehicle audio switch 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 supplies 12V.Combined switch also is provided with ignition lock and ECU starting switch; When ignition lock is after firing circuit is connected the 24V power supply, to connect the ECU starting switch again, just can power supply be provided for engine electric-controlled ECU; But because engine electric-controlled ECU only needs 12V; Therefore, another power supply reducing transformer be between logical ECU starting switch and engine electric-controlled ECU, connect again, engine electric-controlled ECU power supply could be.
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.
Summary of the invention
The purpose of this invention is to provide a kind of DC voltage reducing device, can comprehensive car audio system and the working power requirement of engine electric-controlled ECU system, can reasonably utilize the efficient resource of power supply reducing transformer, avoid the wasting of resources.
For achieving the above object; The invention provides a kind of DC voltage reducing device, comprise the combined switch that is installed on the switching-over post, this combined switch is provided with 24V power end, combined switch and also is provided with vehicle audio switch, ignition lock and ECU starting switch; The said 24V power end of a termination of vehicle audio switch wherein; The other end of vehicle audio switch is connected the power supply reducing transformer, and the 12V dc output end of this power supply reducing transformer is connected on the vehicle audio, it is characterized in that: the said 24V power end of a termination of said ignition lock; One end of another termination ECU starting switch of ignition lock; Ground connection after the coil winding of the other end string relay of ECU starting switch, the 12V dc output end of the said power supply reducing transformer of a termination of this relay normally open switch, the automatically controlled ECU of other end sending and receiving motivation of this relay normally open switch.
The 24V direct current (DC) of combined switch output, be reduced to 12V by the power supply reducing transformer after, can supply power for vehicle audio, can after firing circuit is opened, be engine electric-controlled ECU power supply again.
Said combined switch is installed in the top of passenger vehicle switching-over post, and near bearing circle.
Said relay is fixed on the power supply reducing transformer.Saved the wiring space, reduced and safeguarded separately.
Remarkable result of the present invention is: a kind of simple in structure, DC voltage reducing device that cost is low is provided, can comprehensive car audio system and the working power requirement of engine electric-controlled ECU system, and reasonably utilized the step-down of a power supply reducing transformer, avoid the wasting of resources.
Description of drawings
Fig. 1 is the circuit connection diagram of prior art;
Fig. 2 is this inventive circuit connection diagram.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done further explain.
As shown in Figure 2: a kind of DC voltage reducing device; Comprise the combined switch that is installed on the switching-over post; This combined switch is provided with 24V power end, combined switch and also is provided with vehicle audio K switch 1, ignition lock K2 and ECU starting switch K3, the said 24V power end of a termination of vehicle audio K switch 1 wherein, and the other end of vehicle audio K switch 1 is connected power supply reducing transformer 1; The 12V dc output end of this power supply reducing transformer 1 is connected on the vehicle audio 3; The said 24V power end of the termination of said ignition lock K2, the end of another termination ECU starting switch K3 of ignition lock K2, ground connection after the coil winding of the other end string relay J of ECU starting switch K3; The 12V dc output end of the said power supply reducing transformer 1 of one termination of this relay J normal open switch, the automatically controlled ECU2 of other end sending and receiving motivation of this relay J normal open switch.
Said combined switch is installed in the top of passenger vehicle switching-over post, and near bearing circle.
Said relay J is fixed on the power supply reducing transformer 1.Shorten the electric wire that is connected between power transfer relay J3 and the power supply reducing transformer 1, avoided too much on the car and cross the complicated circuitry wiring, 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.
Push power supply shelves ACC to combined switch, after vehicle audio K switch 1 was connected the 24V direct supply, power supply reducing transformer 1 dropped to 12V with the 24V power supply, and at this moment, power supply reducing transformer 1 provides working power for vehicle audio separately.
Push a fire screen ON to combined switch; Behind ignition lock K2 and ECU starting switch K3 connection 24V direct supply, the relay J coil gets electric, and its normal open switch is closed; Power supply reducing transformer 1 is connected with engine electric-controlled ECU2, and power supply reducing transformer 1 just can be engine electric-controlled ECU2 power supply at this moment.
Claims (3)
1. DC voltage reducing device; Comprise combined switch; This combined switch is provided with 24V power end, combined switch and also is provided with vehicle audio switch (K1), ignition lock (K2) and ECU starting switch (K3); The said 24V power end of a termination of vehicle audio switch (K1) wherein; The other end of vehicle audio switch (K1) is connected power supply reducing transformer (1), and the 12V dc output end of this power supply reducing transformer (1) is connected on the vehicle audio (3), it is characterized in that: the said 24V power end of a termination of said ignition lock (K2); One end of another termination ECU starting switch (K3) of ignition lock (K2); Ground connection after the coil winding of the other end string relay (J) of ECU starting switch (K3), the 12V dc output end of the said power supply reducing transformer of a termination (1) of this relay (J) normal open switch, the automatically controlled ECU of other end sending and receiving motivation (2) of this relay (J) normal open switch.
2. DC voltage reducing device according to claim 1 is characterized in that: said combined switch is installed in the top of passenger vehicle switching-over post, and near bearing circle.
3. DC voltage reducing device according to claim 1 is characterized in that: said relay (J) is fixed on the power supply reducing transformer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102508402A CN101797906B (en) | 2009-12-30 | 2009-12-30 | DC voltage reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102508402A CN101797906B (en) | 2009-12-30 | 2009-12-30 | DC voltage reducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101797906A CN101797906A (en) | 2010-08-11 |
| CN101797906B true CN101797906B (en) | 2012-01-11 |
Family
ID=42593792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102508402A Expired - Fee Related CN101797906B (en) | 2009-12-30 | 2009-12-30 | DC voltage reducing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101797906B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6775119B2 (en) * | 2001-08-07 | 2004-08-10 | Yazaki Corporation | Electrical connection system for vehicle |
| CN1834672A (en) * | 2005-03-18 | 2006-09-20 | 丰田自动车株式会社 | Highly reliable vehicle system start controller |
| CN2845152Y (en) * | 2004-02-20 | 2006-12-06 | 彭小毛 | Automotive audio player volume controller |
| WO2007003967A2 (en) * | 2005-07-06 | 2007-01-11 | Cambridge Semiconductor Limited | Switch mode power supply control systems |
| CN201580334U (en) * | 2009-12-30 | 2010-09-15 | 力帆实业(集团)股份有限公司 | Direct current voltage reduction circuit |
-
2009
- 2009-12-30 CN CN2009102508402A patent/CN101797906B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6775119B2 (en) * | 2001-08-07 | 2004-08-10 | Yazaki Corporation | Electrical connection system for vehicle |
| CN2845152Y (en) * | 2004-02-20 | 2006-12-06 | 彭小毛 | Automotive audio player volume controller |
| CN1834672A (en) * | 2005-03-18 | 2006-09-20 | 丰田自动车株式会社 | Highly reliable vehicle system start controller |
| WO2007003967A2 (en) * | 2005-07-06 | 2007-01-11 | Cambridge Semiconductor Limited | Switch mode power supply control systems |
| CN201580334U (en) * | 2009-12-30 | 2010-09-15 | 力帆实业(集团)股份有限公司 | Direct current voltage reduction circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101797906A (en) | 2010-08-11 |
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| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20191230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |