CN102745149A - Method for controlling starting and power system of passenger car by utilizing passenger car switching device box - Google Patents
Method for controlling starting and power system of passenger car by utilizing passenger car switching device box Download PDFInfo
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- CN102745149A CN102745149A CN2011101022540A CN201110102254A CN102745149A CN 102745149 A CN102745149 A CN 102745149A CN 2011101022540 A CN2011101022540 A CN 2011101022540A CN 201110102254 A CN201110102254 A CN 201110102254A CN 102745149 A CN102745149 A CN 102745149A
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Abstract
The invention discloses a method for controlling starting and power system of a passenger car by utilizing a passenger car switching device box. According to the method, a system voltage/current detection circuit is used for detecting a system voltage and a starting current, when the system voltage and the starting current are abnormal, signals are respectively sent to an instrument processor by virtue of a CAN (controller area network) bus and corresponding indicator lights on an instrument panel are lightened, and a corresponding power supply is cut off according to the situation; and the instrument processor also can be connected with each ECU (electronic control unit) of a vehicle power transmission chain and acquires the situation of the vehicle power transmission chain, and the ECU of the switching device box cuts off a relay of a starter and the power supply of the control system of the starter. By adopting the method disclosed by the invention, the safety and reliability of the passenger car can be thoroughly improved.
Description
Technical field
The present invention relates to the passenger vehicle electric field, relate to a kind of passenger vehicle device for switching box in particular through the method for CAN bussing technique control passenger vehicle starting with power-supply system, it is used the CAN bussing technique and the car load electric system is detected and protects electric system safety.
Background technology
Electric equipment additional on the passenger vehicle is more and more complete, and function also becomes increasingly abundant, because the operating characteristic of bus driving; The power supply of its electrical equipment comes from the storage battery on the passenger vehicle, and the energy source in the storage battery is in electrical generator, when electrical generator can't normal operation; Electric energy can a large amount of losses and can't be replenished in the storage battery behind the vehicle launch, if the power shortage overlong time, will exhaust the electric weight of storage battery; Make the vehicle can't normal starting, have a strong impact on the life-span of storage battery.In addition; When vehicle power chain (main mean engine, Automatic Transmission) when having major failure to be not suitable for starting; Because instrument can't obtain the actv. failure message through the CAN bus, chaufeur also can't be judged the vehicle current state, will cause invalid starting and electric energy loss if start vehicle this moment; Reduce the starter service efficiency, influence the service life of starter.
The device for switching box is control and the critical component of protecting car load electric systems such as comprising storage battery, electrical generator, starter and battery isolator control, and it is the key factor of car load electric system reliability.But; Conventional switch electrical equipment kit function is single and structure is simple and crude; Its often run into when the car load day-to-day operation such as: it is powerless that problems such as major failure and device for switching box aging speed be fast appear in discharged or defective battery overlong time, electrical generator superpressure generating fault, starter loop short trouble, vehicle power chain, and can't play connections, control veritably, in all directions and protect the effect of passenger vehicle electric system key equipment.
In view of this, the inventor has this case to produce to the defective in-depth study on the existing device for switching box performance then.
Summary of the invention
The object of the present invention is to provide the method for a kind of passenger vehicle device for switching box control passenger vehicle starting and power-supply system; Its checking system voltage and in time warning reminding chaufeur exactly, and can control the break-make of cranking signal simultaneously through car load parts communication such as CAN bus and driving engine, Automatic Transmission, instrument in good time.
For realizing above-mentioned purpose, technical scheme of the present invention is:
The method of passenger vehicle device for switching box control passenger vehicle starting and power-supply system wherein, comprises the steps:
Step S100: whether judge key switch at the ACC shelves, if not whether confirm repeatedly at the ACC shelves;
Step S110: closed battery isolator control, and whether judge key switch at the ON shelves, if not whether confirm repeatedly at the ON shelves;
Step S120: whether detection of engine is moved, if move, then carries out following step S200;
Step S130: through a CAN bus interface dynamofluidal message that returns the vehicle to the garage and knock off, and judge whether the vehicle power chain exists major failure,, system's start-up function is under an embargo, and sends major failure information to instrument through the CAN bus if there is major failure;
Step S140: judge whether starter starts, if be in starting state, then monitor the state of starter, and after starter stops, being back to step S100;
Step S150: detect current power source voltage, and judge whether voltage is lower than the low voltage set value, if be not less than the low voltage set value then be back to step S100;
Step S160: send the undervoltage warning signal to instrument through the CAN bus;
Step S200: detect charging circuit and whether open circuit, if do not open circuit then carry out following step S300;
Step S210: send warning through the CAN bus to instrument, point out current can't charging the battery;
Step S220: detect current power line voltage;
Step S230: judge whether voltage is lower than the low voltage set value, if otherwise be back to step S110, if then send the undervoltage warning signal to instrument, and be back to step S110 through the CAN bus;
Step S300: detect current power line voltage;
Step S310: judge whether voltage is higher than the high potential setting value, if be not higher than then return step S110;
Step S320: send system's over voltage alarm signal through the CAN bus to instrument, and return step S110.
Further, in step S140, also comprise step 141: when starter does not stop, then on the CAN bus, sending the power supply status message.
Further, in step S160, comprise also whether judge to continue low pressure surpasses setting-up time, if do not surpass then be back to step S100; And
Step S170: cut off total power switch, and whether judge switch, if not confirming repeatedly that then whether switch is at the OFF shelves at the OFF shelves; If then be back to step S100.
After adopting said structure, the passenger vehicle device for switching box control passenger vehicle starting that the present invention relates to and the method for power-supply system, it can gather the current vehicle power supply status in real time, and when electric voltage exception takes place, reports to the police; And when the vehicle power chain had major failure and is not suitable for starting, system's start-up function was under an embargo, and sends major failure information through the CAN bus to instrument, and need behind trouble-shooting, just can play, thereby fundamentally improves the safety and the reliability of passenger vehicle.
Description of drawings
Fig. 1 is the structured flowchart of control method microbus device for switching box of the present invention preferred embodiment;
Fig. 2 is the structural representation of (not comprising ambient temperature detection module and electrical equipment box ventilating fan) during device for switching box ECU inner structure in the displayed map 1;
Fig. 3 is the scheme drawing of physical relationship between ambient temperature detection module among Fig. 1, electrical equipment box ventilating fan and the device for switching box ECU;
Fig. 4 is the diagram of circuit that the present invention relates to the method for a kind of passenger vehicle device for switching box control passenger vehicle starting and power-supply system.
Among the figure:
Passenger vehicle device for switching box 100 device for switching box ECU 1 microprocessor 11
CAN transceiver 15
System voltage/current detection circuit 2 cranking-motor relays and control system 3 thereof
Battery isolator control and control system 4 ambient temperature detection modules 5 thereof
The outer temperature sensor 52 of temperature sensor 51 boxes in the box
Processes temperature signal circuit 53 electrical equipment box ventilating fans 6 CAN buses 7
The specific embodiment
In order further to explain technical scheme of the present invention, come the present invention is set forth in detail through specific embodiment below.
As depicted in figs. 1 and 2; A kind of passenger vehicle device for switching box 100 that it relates to for control method of the present invention; The device for switching box ECU1 and the system voltage/current detection circuit 2, cranking-motor relay and the control system 3 thereof that all link to each other and battery isolator control and the control system 4 thereof that comprise band CAN bus communication function with device for switching box ECU1, wherein:
These system voltage/current detection circuit 2 checking system voltages, and the system voltage detected value that obtains transferred to device for switching box ECU1; Be provided with the value range of system voltage in this device for switching box ECU1, promptly comprise high potential setting value and low voltage set value; Too high or cross when low when system voltage, this device for switching box ECU1 can send signal with the too high or too low warning indicator lamp of the system voltage of lighting instrument face plate to instrument treater 300 through CAN bus 7, reminds the chaufeur fault that checks vehicles; If this moment, vehicle was in non-driving states, this device for switching box ECU1 then can cut off or delay cutting power main supply switch and control system 4 thereof, to ensure the safety and stability of storage battery and car load current consumer;
This system voltage/current detection circuit 2 also detects starting current, and the starting current detected value that obtains is transferred to device for switching box ECU1; Be provided with the value range of starting current in this device for switching box ECU1; When detecting the unusual breakdown signal of starting current; The power supply that this device for switching box ECU1 cuts off cranking-motor relay and control system 3 thereof immediately; Thereby make system's fail to start, send signal to light the start system major failure indicator lamp of instrument face plate, remind chaufeur inspection car load start system circuit to instrument treater 300.
This device for switching box ECU1 is connected with vehicle power chain 200 each ECU through CAN bus 7; And know the situation of vehicle power chain 200; When vehicle power chain 200 is not suitable for starting; Be vehicle power chain 200 when major failure occurring, this device for switching box ECU1 cuts off the power supply of cranking-motor relay and control system 3 thereof, and device for switching box ECU1 also sends signal to instrument treater 300 and with the corresponding warning indicator lamp of lighting instrument face plate instrument can be shown from the alarm failure information of device for switching box ECU1 with the prompting vehicle driver fault that checks vehicles in real time; Guarantee the normal operation of passenger vehicle, prolong the service life of key components and parts.
In order to let passenger vehicle device for switching box 100 have the ponding of being difficult for, corrosion prevention and aging-resistant effect; This passenger vehicle device for switching box 100 also comprises ambient temperature detection module 5 and electrical equipment box ventilating fan 6; This ambient temperature detection module 5 all links to each other with device for switching box ECU1 with electrical equipment box ventilating fan 6; As shown in Figure 3; This ambient temperature detection module 5 has temperature sensor 51 in the box, the outer temperature sensor 52 of box and processes temperature signal circuit 53; Temperature sensor 51, the outer temperature sensor 52 of box are monitored the internal and external temperature variation of device for switching box box in real time and through processes temperature signal circuit 53 temperature signal that obtains are sent into device for switching box ECU1 in this box; This device for switching box ECU1 makes relatively to obtain in real time both numerical difference between with device for switching box internal and external temperature, and this device for switching box ECU1 also is built-in with preset value, and this device for switching box ECU1 is in numerical difference between control apparatus box ventilating fan 6 work during greater than preset value.Temperature sensor 51 all preferably adopts AD590 with the outer temperature sensor 52 of box in this box; And through sending into device for switching box ECU1 with voltage form behind the temperature signal processor; Device for switching box ECU1 does device for switching box internal and external temperature in real time relatively; If both numerical value differences are greater than preset value △ T1; Then device for switching box ECU1 drives 6 work of electrical equipment box ventilating fan to realize the circulation of box inner air and outer air, less than preset value △ T2 (△ T2＜△ T1), guarantees that the operating temperature and the ambient temperature of passenger vehicle device for switching box 100 keeps relative stability up to box internal and external temperature numerical value difference.Thus, solved because the too high component aging problem that causes of temperature rise in the box is generated heat in the interior components and parts work of device for switching box; The acidic gas long-term existence that interior water with fixed attention of electrical equipment box that has caused when having avoided electrical equipment box internal and external temperature difference big simultaneously and storage battery discharge also slowly corrodes the problem of components and parts in the box in switch enclosure, so make the device for switching box have the ponding of being difficult for, corrosion prevention and aging-resistant characteristics.
Particularly; This device for switching box ECU1 comprises microprocessor 11 and the CAN controller 12 that all links to each other with microprocessor 11, sampling interface circuit 13 and control interface circuit 14; This CAN controller 12 also is connected with CAN transceiver 15, and this CAN transceiver 15 links to each other with CAN bus 7 and receives fault and the status signal that vehicle power chain 200 each ECU send in real time; This sampling interface circuit 13 links to each other with system voltage/ current detection circuit 2, and 14 in this control interface circuit also links to each other with battery isolator control and control system 4 thereof with cranking-motor relay and control system 3 thereof.So; When microprocessor 11 detects that system voltage is too high or too low, system opens circuit, electrical generator can not charge, during complete vehicle fault signal such as ON shelves electric power disconnection or starting current are unusual, lights corresponding warning signal indicator lamp and cut off or corresponding failure part power supply is cut off in time-delay through device for switching box ECU1 control interface through instrument treater 300 through system voltage/current detection circuit 2.During practical implementation, CAN controller 124 is selected PHILIPS 82C200 for use, and CAN transceiver 155 is selected PHILIPS TJA1050 for use, and adopts the communications protocol of SAE J1939 as CAN bus 7.
In order to let the process of 100 control passenger vehicles startings of the passenger vehicle device for switching box that the present invention relates to and power-supply system more clearly embodied; The present invention also provides the method for a kind of passenger vehicle device for switching box 100 control passenger vehicle startings and power-supply system; Its checking system voltage and in time warning reminding chaufeur exactly, and can control the break-make of cranking signal simultaneously through car load parts communication such as CAN bus 7 and driving engine, Automatic Transmission, instrument in good time.
As shown in Figure 4, this method comprises the steps:
Step S100: whether judge key switch at the ACC shelves, if not whether confirm repeatedly at the ACC shelves;
Step S110: closed battery isolator control, and whether judge key switch at the ON shelves, if not whether confirm repeatedly at the ON shelves;
Step S120: whether detection of engine is moved, if move, then carries out following step S200;
Step S130: the message that receives vehicle power chain 200 (being transmitting set and Automatic Transmission) through CAN bus 7; And judge whether vehicle power chain 200 exists major failure; If there is major failure; System's start-up function is under an embargo, and sends major failure information to instrument through CAN bus 7;
Step S140: judge whether starter starts, if be in starting state, then monitor the state of starter, and after starter stops, being back to step S100; Preferably, also comprise step 141: when starter does not stop, then on CAN bus 7, sending the power supply status message;
Step S150: detect current power source voltage, and judge whether voltage is lower than the low voltage set value, if be not less than the low voltage set value then be back to step S100; Concrete this low voltage set value is 24V;
Step S160: send the undervoltage warning signal through CAN bus 7 to instrument, and judge whether continue low pressure surpasses setting-up time, if do not surpass then be back to step S100, in the present embodiment, what this setting-up time was selected for use is 4 minutes;
Step S170: cut off total power switch, and whether judge switch, if not confirming repeatedly that then whether switch is at the OFF shelves at the OFF shelves; If then be back to step S100;
Step S200: detect charging circuit and whether open circuit, if do not open circuit then carry out following step S300;
Step S210: send warning through CAN bus 7 to instrument, point out current can't charging the battery;
Step S220: detect current power line voltage;
Step S230: judge whether voltage is lower than the low voltage set value, if otherwise be back to step S110, if then send the undervoltage warning signal to instrument, and be back to step S110 through CAN bus 7;
Step S300: detect current power line voltage;
Step S310: judge whether voltage is higher than the high potential setting value, if be not higher than then return step S110; Concrete this high potential setting value is 32V;
Step S320: send system's over voltage alarm signal through CAN bus 7 to instrument, and return step S110.
Be elaborated in the face of the independent functional module in the above-mentioned steps down:
At first, the real-time current power supply status of collection vehicle, the power supply status when it comprises the vehicle unstart after power supply status and the starting, it specifically is divided into three kinds of states again:
State one, the power supply status when rim brake closure and vehicle unstart:
Vehicle is by storage battery power supply at this moment, and the car load power line voltage that is collected should be not less than low voltage set value 24V, is the judgement among the step S150;
State two, the power supply status during the passenger vehicle starting:
When starter started, because battery tension can reduce rapidly, this moment, power-supply management system only sent the CAN message to instrument controller, did not take any safety method, was step S141.
State three, starter stop and the power supply status of generator operation:
Vehicle is by generator powered at this moment, and the car load power line voltage that is collected should be (positive and negative deviation 1V all belongs to normal condition) about 28V, and promptly step S200 is to step S320.
Secondly, when power supply overvoltage occurs, opens circuit, during unusual condition such as under-voltage, take the corresponding protection measure:
When vehicle is in state three, when detecting system voltage, send the too high warning of system voltage to instrument through CAN bus 7 above 32V; Be step S310 and step S320.
When vehicle is in state for the moment, system voltage is lower than when setting the value of putting 24V, sends warning through CAN bus 7 to instrument, above 4 minutes main supply switchs of cutting off the electricity supply, when opening key switch again to the ON shelves, can reclose battery isolator control 4 minutes; Instrument prompting chaufeur starts as early as possible; Be step S150, S160 and S170.
When the system of detecting opens circuit, when electrical generator can not charge, send warning to instrument through CAN bus 7, remind chaufeur to note the current vehicle power supply status, be step S210.
When vehicle power chain 200 has major failure and can't start the time, system's start-up function is under an embargo, and sends major failure information through CAN alignment instrument, need could start behind the trouble-shooting, be step S130.
Structure below in conjunction with Fig. 2 specifies once more:
When key switch closure and vehicle do not start; CAN transceiver 15 can receive fault and the status signal that vehicle power chain 200 each ECU send through CAN bus 7 in real time; Send into microprocessor 11 via CAN controller 12; Microprocessor 11 judges whether vehicle power chain 200 is in the major failure state that is not suitable for starting at this moment, and when vehicle power chain 200 had major failure to be not suitable for starting, system can cut off the car load power supply relay automatically; And send vehicle power chain 200 major failure information to instrument treater 300 through CAN bus 7, need could start behind the trouble-shooting.
After the key switch closure; This moment, car load was in the power connection state, and the switch control capsule can be gathered vehicle voltage value under the current state in real time through sampling interface circuit 13, sends into microprocessor 11; Simultaneously compare calculating with VREF (Voltage Reference); When the system voltage value was lower than 24V, system can break off through control interface circuit 14 output high level control car load power supply relay coils, thus control car load power supply; Behind vehicle launch, if microprocessor 11 detects system voltage and is higher than 32V, the CAN controller 12 in the switch control capsule will send the too high warning of system voltage to instrument through CAN bus 7 with CAN transceiver 15.
The method of the passenger vehicle device for switching box 100 that the present invention relates to and starting of control passenger vehicle and power-supply system, it can gather the current vehicle power supply status in real time, and when electric voltage exception takes place, reports to the police; And when vehicle power chain 200 has major failure and is not suitable for starting; System's start-up function is under an embargo; Send major failure information through CAN bus 7 to instrument, and need behind trouble-shooting, just can play, thereby fundamentally improve the safety and the reliability of passenger vehicle.In addition, the present invention makes whole device for switching box can be in real-time state of a control through the above-mentioned on-cycle process step of design, and checks very accurately with in time to various hidden danger and problem.
The foregoing description and graphic and non-limiting product form of the present invention and style, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (3)
1. the method for starting of passenger vehicle device for switching box control passenger vehicle and power-supply system is characterized in that, comprises the steps:
Step S100: whether judge key switch at the ACC shelves, if not whether confirm repeatedly at the ACC shelves;
Step S110: closed battery isolator control, and whether judge key switch at the ON shelves, if not whether confirm repeatedly at the ON shelves;
Step S120: whether detection of engine is moved, if move, then carries out following step S200;
Step S130: through a CAN bus interface dynamofluidal message that returns the vehicle to the garage and knock off, and judge whether the vehicle power chain exists major failure,, system's start-up function is under an embargo, and sends major failure information to instrument through the CAN bus if there is major failure;
Step S140: judge whether starter starts, if be in starting state, then monitor the state of starter, and after starter stops, being back to step S100;
Step S150: detect current power source voltage, and judge whether voltage is lower than the low voltage set value, if be not less than the low voltage set value then be back to step S100;
Step S160: send the undervoltage warning signal to instrument through the CAN bus;
Step S200: detect charging circuit and whether open circuit, if do not open circuit then carry out following step S300;
Step S210: send warning through the CAN bus to instrument, point out current can't charging the battery;
Step S220: detect current power line voltage;
Step S230: judge whether voltage is lower than the low voltage set value, if otherwise be back to step S110, if then send the undervoltage warning signal to instrument, and be back to step S110 through the CAN bus;
Step S300: detect current power line voltage;
Step S310: judge whether voltage is higher than the high potential setting value, if be not higher than then return step S110;
Step S320: send system's over voltage alarm signal through the CAN bus to instrument, and return step S110.
2. the method for passenger vehicle device for switching box control passenger vehicle starting as claimed in claim 1 and power-supply system is characterized in that, in step S140, also comprises step 141: when starter does not stop, then on the CAN bus, sending the power supply status message.
3. the method for passenger vehicle device for switching box as claimed in claim 1 control passenger vehicle starting and power-supply system is characterized in that, in step S160, also comprises judging whether continue low pressure surpasses setting-up time, if not above be back to step S100; And
Step S170: cut off total power switch, and whether judge switch, if not confirming repeatedly that then whether switch is at the OFF shelves at the OFF shelves; If then be back to step S100.
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| CN2011101022540A CN102745149A (en) | 2011-04-22 | 2011-04-22 | Method for controlling starting and power system of passenger car by utilizing passenger car switching device box |
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| CN2011101022540A CN102745149A (en) | 2011-04-22 | 2011-04-22 | Method for controlling starting and power system of passenger car by utilizing passenger car switching device box |
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| CN111405721A (en) * | 2019-11-13 | 2020-07-10 | 浙江凯耀照明有限责任公司 | Wireless control L ED intelligent power supply |
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Application publication date: 20121024 |