CN104661360A - Device for achieving lighting function of daytime running lamp for dipped headlight of vehicle - Google Patents
Device for achieving lighting function of daytime running lamp for dipped headlight of vehicle Download PDFInfo
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- CN104661360A CN104661360A CN201310578321.5A CN201310578321A CN104661360A CN 104661360 A CN104661360 A CN 104661360A CN 201310578321 A CN201310578321 A CN 201310578321A CN 104661360 A CN104661360 A CN 104661360A
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- dipped headlights
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Abstract
The invention provides a device for achieving a lighting function of a daytime running lamp for a dipped headlight of a vehicle. A system network signal is input into a headlight control module; the headlight control module comprises an information processing unit, a control algorithm unit and an output control module; the information processing unit receives the system network signal, performs analysis and processing by taking the signal as a control variable, identifies working modes of the dipped headlight, and forms an analysis result; the control algorithm unit calls a control algorithm based on the analysis result to form a control strategy; the output control module outputs a control signal based on the control strategy to control the dipped headlight to be in different working modes, and adopts PWM (Pulse-Width Modulation) output control; the control strategy comprises the step of allowing the control signal to adjust the brightness of the dipped headlight according to different duty ratios to achieve switching between the different working modes; and the working modes include a dipped headlight lighting mode and a daytime running lamp lighting mode. The device conveniently and quickly allows the dipped headlight of the vehicle to switch between the different working modes by the information processing unit and the control algorithm module.
Description
Technical field
The present invention relates to the device that a kind of dipped headlights for vehicle realizes daytime running lamps illumination functions.
Background technology
Daytime running lamps are contained in front part of vehicle, and vehicle is more easily recognized during daytime running.Daytime running lamps, its effect not for illumination, and be to make vehicle to be easy to by around pedestrian and vehicle identify.Therefore, daytime running lamps belong to a kind of signal lamp, and its illumination intensity and emission type need the requirement meeting specific regulation.
Daytime running lamps drive a vehicle time can produce suggesting effect, remind other drivers or pedestrian to discover better and to identify vehicle, raising vehicle by identification.Vehicle, after installation daytime running lamps, effectively can reduce traffic accident, and reduce the dead probability of traffic accident.
Under normal circumstances, the control of daytime running lamps adopts independent bulb or LED to design.But current, the control method for daytime running lamps is still too simple, cannot contain the requirement of respective standard (such as ECE Regulation No.48) for daytime running lamps work operating mode.
Usually, in vehicle, daytime running lamps can only adopt independent light fixture to realize, and cannot be multiplexing with other light fixtures (such as dipped headlights).
To this, a kind of headlamp module was once mentioned in Chinese patent CN10247079A, the mode lighting the LED of a different number in this headlamp module, to realize different brightness, can realize the multiplexing of daytime running lamps and dipped headlights thus in headlamp module.But the shortcoming that this method exists is: 1, need many LED lamp to realize brightness regulation, required cost is larger; 2, plurality of LEDs lamp needs accurate distribution at diverse location, arranges that precision is higher, installs and comparatively bother, and then propose very high requirement to the moulding of lamp.
Summary of the invention
The invention provides the device that a kind of dipped headlights for vehicle realizes daytime running lamps illumination functions, be intended to realize dipped headlights easily between various different working modes (especially dipped headlights light illumination mode and daytime running lamps light illumination mode), carry out convenience conversion.
Specifically, the invention provides the device that a kind of dipped headlights for vehicle realizes daytime running lamps illumination functions, in said device, grid signal is transfused to large lamp control module, and wherein, described large lamp control module comprises: information process unit, this information process unit is for receiving described grid signal, carry out analyzing and processing using described grid signal as control variables, thus identify the mode of operation that dipped headlights should have, form analysis result thus; Control algolithm unit, control algolithm unit calls control algolithm formation control strategy on the basis at described analysis result; Output control module, this output control module exports control signal based on described control strategy and is in different mode of operations to control dipped headlights, output control module adopts PWM to export and controls, the control strategy that its control algolithm unit is formed comprises: the control signal that described PWM output control module exports according to different duty ratios to adjust the brightness of dipped headlights, realize the switching of dipped headlights between different working modes thus, the mode of operation of dipped headlights at least comprises dipped headlights light illumination mode and daytime running lamps light illumination mode.
Preferably, the mode of operation of dipped headlights comprises further: cut-off (OFF) state, high speed dipped headlights light illumination mode.
Preferably, large lamp control module is independently controller, or the outer lamp control section of car body controller.
More preferably, described grid signal comprises the speed of a motor vehicle, Der StandlichtScheinwerfer und Parkleuchtenschalter, engine operating status, TR signal, parking brake signal, parking brake state and ambient light sensor signal.
More preferably, information process unit carries out analyzing and processing using Der StandlichtScheinwerfer und Parkleuchtenschalter, ambient light sensor as control variables, if meet any one in following condition: (1) Der StandlichtScheinwerfer und Parkleuchtenschalter is opened; Or (2) Der StandlichtScheinwerfer und Parkleuchtenschalter is in " AUTO " shelves, and ambient light sensor is shown as state at night; (3) vehicle speed signal, then the analysis result of information process unit is: large lamp control module controls dipped headlights and is in dipped headlights light illumination mode, and its output control module exports the control signal of the first duty ratio to control the lighting intensity of dipped headlights.
More preferably, described first duty ratio sets according to the light distribution requirements of dipped headlights light illumination mode.
More preferably, in dipped headlights light illumination mode, when the speed of a motor vehicle is greater than particular value, output control module exports the control signal of the second duty ratio to control the lighting intensity of dipped headlights, now, switch to high speed lower beam illumination pattern from dipped headlights light illumination mode, wherein, the second duty ratio is greater than the first duty ratio.
More preferably, described second duty ratio sets according to the light distribution requirements of high speed lower beam illumination pattern.
Preferably, information process unit carries out the illumination of analyzing and processing identification daytime running lamps using Der StandlichtScheinwerfer und Parkleuchtenschalter, ambient light sensor, engine operating status, TR signal, parking brake signal as control variables, if meet following condition: (1) Der StandlichtScheinwerfer und Parkleuchtenschalter is in cut-off state or " AUTO " shelves, and ambient light sensor sensing is state on daytime; (2) engine is in operating condition; (3) TR is not at " P " shelves; (4) parking brake function un-activation, then the analysis result of information process unit is: large lamp control module controls dipped headlights and is in daytime running lamps pattern, and the control signal that output control module exports the 3rd duty ratio controls the lighting intensity of dipped headlights to meet daytime running lamps requirement.
More preferably, the 3rd duty ratio sets according to the light distribution requirements of daytime running lamps pattern.
To sum up, the present invention is by large lamp control module, especially information process unit and control algolithm module, can switch between various different working modes vehicle dipped headlights easily, it is controlled that its advantage is to make the brightness of dipped headlights, and increasing the illuminating effect of super expressway traveling, the program can also make dipped headlights play the function of daytime running lamps simultaneously simultaneously.Especially, in the handoff procedure of dipped headlights pattern and daytime running lamps pattern, do not need to install that plurality of LEDs lamp can realize between dipped headlights and daytime running lamps is multiplexing.
Accompanying drawing explanation
Fig. 1 illustrates according to the control chart realizing the selection switching between different mode for dipped headlights of the present invention;
Fig. 2 shows the control flow chart that dipped headlights realizes daytime running lamps illumination functions.
Embodiment
Hereinafter, identical Reference numeral refers to identical element.
The present invention considers to adopt dipped headlights to realize the control of the illumination functions of daytime running lamps.Specifically, the present invention according to different illumination intensity requirements, based on the function policy difference of dipped headlights and daytime running lamps, by controlling dipped headlights, the selection between different mode dipped headlights being realized to dipped headlights and switching.
Fig. 1 illustrates according to the control chart realizing the selection switching between different mode for dipped headlights of the present invention.In the embodiment depicted in fig. 1, grid signal 101 is input to large lamp control module 102 by CAN, draft control strategy to control dipped headlights 103 by large lamp control module 102 again, impel dipped headlights 103 to carry out selecting and switching between different mode.
Specifically, as shown in Figure 1, grid signal 101 comprises the speed of a motor vehicle, Der StandlichtScheinwerfer und Parkleuchtenschalter, engine operating status, gear signal, parking brake signal, parking brake state and ambient light sensor signal etc.Large lamp control module 102 subsequently realizes corresponding control strategy using these grid signals as control variables just.
Grid signal 101, by CAN, via the CAN interface of large lamp control module 102, inputs large lamp control module 102.Large lamp control module 102 can be independently controller, also can be the outer lamp control section of car body controller (BCM).
Large lamp control module 102 can comprise information process unit 201, control algolithm unit 202, PWM output control module 203,204.Information process unit 201, from CAN interface to corresponding grid signal, carries out analyzing and processing using these grid signals as control variables, thus identifies the mode of operation that dipped headlights should have.On the basis of the analysis result of information process unit 201, control algolithm unit 202 calls corresponding control algolithm formation control strategy.PWM output control module 203,204 exports control signal based on formed control strategy and controls dipped headlights 103, thus control dipped headlights 103 realizes dipped headlights mode of operation and/or daytime running lamps mode of operation.
Especially, large lamp control module 102 can judge according to current required grid signal 101 and identify four kinds of mode of operations that dipped headlights throws light on, and is respectively: cut-off (OFF) state, dipped headlights light illumination mode, high speed dipped headlights light illumination mode, daytime running lamps light illumination mode.
For different mode of operations, the duty ratio of the output signal of the PWM output control module 203,204 of large lamp control module 102 is different.By different duty ratios, just can adjust the brightness of dipped headlights, realize different light illumination modes thus.Not be fixed in an absolute constant value in this " duty ratio " sayed, preferably, duty ratio can be set according to the light distribution requirements of dipped headlights and daytime running lamps.
Specifically, dipped headlights light illumination mode is described below for the control logic of control variables: 1, Der StandlichtScheinwerfer und Parkleuchtenschalter is opened; Or 2, Der StandlichtScheinwerfer und Parkleuchtenschalter is in " AUTO " shelves, and ambient light sensor is shown as state at night.As long as meet one of above-mentioned two conditions, namely large lamp control module controls dipped headlights and is in dipped headlights light illumination mode.
But, in dipped headlights light illumination mode, when information process unit 201 analysis finds that the speed of a motor vehicle is greater than certain value (such as 90 kilometers/hour), the control signal that PWM output control module can export high duty ratio suitably controls the lighting intensity of dipped headlights, thus promotes the fail safe of running at high speed night.Now namely large lamp control module controls dipped headlights and is in high speed lower beam illumination pattern.
Control logic corresponding to daytime running lamps pattern then can be described below: 1, Der StandlichtScheinwerfer und Parkleuchtenschalter is in cut-off (OFF) state or " AUTO " shelves, and ambient light sensor is shown as state on daytime; 2, engine is in operating condition; 3, TR is not at " P " shelves; 4, parking brake or the un-activation of EPB function.As met above all conditions, then large lamp control module controls dipped headlights and is in daytime running lamps light illumination mode.
Fig. 2 shows the control flow chart that dipped headlights realizes daytime running lamps illumination functions.As shown in Figure 2, after total system initialization, large lamp control module reads network signal, carries out analyzing and processing subsequently using network signal as control variables.First " Der StandlichtScheinwerfer und Parkleuchtenschalter " this state variable in control variables is investigated.
If Der StandlichtScheinwerfer und Parkleuchtenschalter state is " opening (ON) ", then investigate " speed of a motor vehicle " further, as now, " speed of a motor vehicle " is greater than particular value (such as, as shown in the figure 90 kilometers/hour), then dipped headlights enters high speed lower beam illumination pattern; As now " speed of a motor vehicle " be not more than as described in particular value, then dipped headlights enters lower beam illumination pattern.
If Der StandlichtScheinwerfer und Parkleuchtenschalter state is " AUTO ", then investigate " ambient light sensor " further, as " ambient light sensor " is shown as state at night, then when the speed of a motor vehicle is greater than particular value, dipped headlights enters high speed lower beam illumination pattern, and dipped headlights enters lower beam illumination pattern when the speed of a motor vehicle is not more than particular value.
If Der StandlichtScheinwerfer und Parkleuchtenschalter state is for " automatically (AUTO) " and ambient light sensor is shown as state on daytime, if or Der StandlichtScheinwerfer und Parkleuchtenschalter state be " ending (OFF) ", then investigate engine operating status further.Now, as engine does not also operate, then dipped headlights enters cut-off (OFF) pattern.As engine operates, then row investigates TR again.As TR is in P shelves, then dipped headlights also enters cut-off (OFF) pattern.As speed changer is not in P shelves, then investigate parking brake or EPB function again.As parking brake or EPB function are activated, then dipped headlights also enters cut-off (OFF) state.As parking brake or EPB function are not activated, then dipped headlights enters daytime running lamps pattern.
As described above, according to the various different modes that dipped headlights adopts, the duty ratio that PWM can be adopted to export adjusts or controls lighting intensity.Such as, as shown in Figure 2, for high speed lower beam illumination pattern, the PWM output duty cycle adopted is 90%, and for lower beam illumination pattern, the PWM output duty cycle adopted is 80%, for daytime running lamps pattern, the PWM output duty cycle adopted is 30%, and for cut-off mode, PWM output duty cycle is 0%.As can be seen here, in the present invention, under high speed lower beam illumination pattern, PWM output duty cycle is the highest, for lower beam illumination pattern, then takes second place, and for daytime running lamps pattern, then more take second place, and when dipped headlights is under cut-off mode, then PWM output duty cycle is 0%.
In sum, the present invention is by large lamp control module, especially the setting of information process unit and control algolithm module, and be aided with the control of PWM output duty cycle, just can switch between various different working modes vehicle dipped headlights easily, dipped headlights especially can be made simultaneously to play the function of daytime running lamps.
Those skilled in the art will also be appreciated that protection scope of the present invention is not limited in above-described embodiment, allly all fall within the scope of the invention to equivalents of the present invention.
Claims (10)
1. realize a device for daytime running lamps illumination functions for the dipped headlights of vehicle, it is characterized in that: in said device, grid signal is transfused to large lamp control module,
Wherein, described large lamp control module comprises:
Information process unit, this information process unit, for receiving described grid signal, carries out analyzing and processing using described grid signal as control variables, thus identifies the mode of operation that dipped headlights should have, and forms analysis result thus;
Control algolithm unit, control algolithm unit calls control algolithm formation control strategy on the basis at described analysis result;
Output control module, this output control module exports control signal based on described control strategy and is in different mode of operations to control dipped headlights,
Output control module adopts PWM to export and controls, the control strategy that its control algolithm unit is formed comprises: the control signal that described PWM output control module exports according to different duty ratios to adjust the brightness of dipped headlights, realize the switching of dipped headlights between different working modes thus, the mode of operation of dipped headlights at least comprises dipped headlights light illumination mode and daytime running lamps light illumination mode.
2. device according to claim 1, is characterized in that, the mode of operation of dipped headlights comprises further: cut-off (OFF) state, high speed dipped headlights light illumination mode.
3. device according to claim 1, is characterized in that, large lamp control module is independently controller, or the outer lamp control section of car body controller.
4. device according to claim 2, is characterized in that, described grid signal comprises the speed of a motor vehicle, Der StandlichtScheinwerfer und Parkleuchtenschalter, engine operating status, TR signal, parking brake signal, parking brake state and ambient light sensor signal.
5. device according to claim 4, is characterized in that, information process unit carries out analyzing and processing using Der StandlichtScheinwerfer und Parkleuchtenschalter, ambient light sensor as control variables, if meet any one in following condition:
(1) Der StandlichtScheinwerfer und Parkleuchtenschalter is opened; Or
(2) Der StandlichtScheinwerfer und Parkleuchtenschalter is in " AUTO " shelves, and ambient light sensor is shown as state at night;
(3) vehicle speed signal,
Then the analysis result of information process unit is: large lamp control module controls dipped headlights and is in dipped headlights light illumination mode, and its output control module exports the control signal of the first duty ratio to control the lighting intensity of dipped headlights.
6. device according to claim 5, is characterized in that, described first duty ratio sets according to the light distribution requirements of dipped headlights light illumination mode.
7. device according to claim 5, it is characterized in that, in dipped headlights light illumination mode, when the speed of a motor vehicle is greater than particular value, output control module exports the control signal of the second duty ratio to control the lighting intensity of dipped headlights, now, switches to high speed lower beam illumination pattern from dipped headlights light illumination mode, wherein, the second duty ratio is greater than the first duty ratio.
8. device according to claim 7, is characterized in that, described second duty ratio sets according to the light distribution requirements of high speed lower beam illumination pattern.
9. device according to claim 1, it is characterized in that, information process unit carries out the illumination of analyzing and processing identification daytime running lamps, if meet following condition using Der StandlichtScheinwerfer und Parkleuchtenschalter, ambient light sensor, engine operating status, TR signal, parking brake signal as control variables:
(1) Der StandlichtScheinwerfer und Parkleuchtenschalter is in cut-off state or " AUTO " shelves, and ambient light sensor sensing is state on daytime;
(2) engine is in operating condition;
(3) TR is not at " P " shelves;
(4) parking brake function un-activation,
Then the analysis result of information process unit is: large lamp control module controls dipped headlights and is in daytime running lamps pattern, and the control signal that output control module exports the 3rd duty ratio controls the lighting intensity of dipped headlights to meet daytime running lamps requirement.
10. device according to claim 9, is characterized in that, the 3rd duty ratio sets according to the light distribution requirements of daytime running lamps pattern.
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| CN201310578321.5A CN104661360A (en) | 2013-11-18 | 2013-11-18 | Device for achieving lighting function of daytime running lamp for dipped headlight of vehicle |
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| CN201310578321.5A CN104661360A (en) | 2013-11-18 | 2013-11-18 | Device for achieving lighting function of daytime running lamp for dipped headlight of vehicle |
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Application publication date: 20150527 |