CN203496882U - Vacuum degree matching and adjusting system for vehicle vacuum booster - Google Patents
Vacuum degree matching and adjusting system for vehicle vacuum booster Download PDFInfo
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- CN203496882U CN203496882U CN201320592581.3U CN201320592581U CN203496882U CN 203496882 U CN203496882 U CN 203496882U CN 201320592581 U CN201320592581 U CN 201320592581U CN 203496882 U CN203496882 U CN 203496882U
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Abstract
The utility model provides a vacuum degree matching and adjusting system for a vehicle vacuum booster. The vacuum degree matching and adjusting system for the vehicle vacuum booster comprises a sensor module used for obtaining a vacuum degree of the vehicle vacuum booster, a speed signal and an accelerator pedal signal; and an electronic control unit used for receiving a vehicle gear signal and signals sent from the sensor module and determining whether the vacuum degree is less than a preset first vacuum degree or not. When the vacuum degree is less than the preset first vacuum degree, the vehicle speed is located in a preset numerical range, and the accelerator pedal is not stepped on, a vehicle load is controlled to be turned off; or when the vacuum degree is less than the preset first vacuum degree and vehicle gears are not located in P or N states, an idling speed of an engine is controlled to be increased. The vacuum degree of the vehicle vacuum booster is increased by turning the load off or increasing the engine idling speed, and therefore output force is increased to increase braking intensity, and driving security is improved.
Description
Technical field
The utility model relates to vehicle technology field, particularly a kind of Matching and modification system of vehicle vacuum booster degree of vacuum.
Background technology
Along with the development of manned vehicle technology, client is meeting on the basis of the key propertys such as traveling comfort, dynamic property, starts more to pay attention to the safety of car, for vehicle braking performances, requires more and more higher.Most cars adopts vacuum booster, makes manpower and power and uses.The vacuum source of the brake system vacuum booster unit of traditional combustion engine car comes from engine intake manifold.The air inlet absolute pressure of induction maniflod and the difference of bar pressure are degree of vacuum.
Vacuum booster is generally installed between brake pedal and master brake cylinder, by pedal, passes through push rod direct control.The power that servo-unit and pedal produce is superimposed and acts on master brake cylinder push rod, to improve the delivery pressure of master brake cylinder.The servo vacuum air chamber of vacuum booster is divided into normal pressure chamber and transformation chamber by the piston with rubber diaphragm, and the degree of vacuum of general normal pressure chamber is 0.6Bar～0.8Bar.The size of power-assisted that can provide vacuum booster depends on the size of its normal pressure chamber and transformation chamber air pressure difference.When the degree of vacuum of transformation chamber reaches external atmosphere pressure, vacuum booster can provide maximum brake boost.
In order to improve traveling comfort and the convenient driving of car load, on contemporary automobile, high-performance air-conditioning, Automatic Transmission, back mirror electro heat, rear window heating have become standard configuration, this has just caused the absolute pressure of induction maniflod more and more higher, simultaneously because vehicle economy requires more and more higher, the driving engine of small displacement becomes the trend of development of automobile, in order to meet the traveling comfort of car load and the requirement of convenient driving, degree of vacuum is to downward trend development gradually, the safety that impact is driven.
As everyone knows, between barometric pressure and sea level elevation, relation can represent by relational expression as follows:
Wherein: P
0be standard atmosphere, equal 1013.25mbar; The sea level elevation of Altitude Shi Yi meter Wei unit; P is the air pressure that mbar is unit of take at a certain height.
Please refer to Fig. 1, Fig. 1 has described the relation of change of atmospheric pressure and sea level elevation according to formula above.As shown in Figure 1, when height is when sea level rise to 11,000 meters high of height above sea level, barometric pressure drops to 230mbar from 1013.25mbar.We are not difficult to find out from figure, and when height is during lower than 1,500 meter, barometric pressure is almost linear to be reduced, and every 100 meters are approximately reduced 11.2mbar, and every 10 meters are approximately reduced 1.1mbar.
So when vacuum boost system brakes power-assisted is provided under meeting nominal situation, how allowing vacuum boost system that efficient power-assisted is provided in high altitude region is also the problem that current car designer faces.Because the continuous rising along with sea level elevation, bar pressure is downward trend, now cannot provide enough degree of vacuum to vacuum boost system, especially under engine high load work, vacuum boost system more cannot meet the needs of brake system, brake pedal force obviously increases, and has serious potential safety hazard.
Utility model content
Feature and advantage of the present utility model are partly statement in the following description, or can describe obviously from this, or can learn by putting into practice the utility model.
For overcoming the problem of prior art, the utility model provides a kind of Matching and modification system of vehicle vacuum booster degree of vacuum, when vehicle vacuum booster low vacuum, by closing vehicle load or improving the degree of vacuum that idling speed is carried out lifting vehicle vacuum booster, thereby improve drive safety.
It is as follows that the utility model solves the problems of the technologies described above adopted technical scheme:
According to an aspect of the present utility model, a kind of Matching and modification system of vehicle vacuum booster degree of vacuum is provided, comprising: sensor assembly, for obtaining degree of vacuum, vehicle speed signal, the accelerator pedal signal of vehicle vacuum booster; Electronic control unit, the signal sending for receiving automobile gear level signal and this sensor assembly, and judge whether this degree of vacuum is less than the first default degree of vacuum; When this degree of vacuum is less than the first default degree of vacuum, vehicle speed is in default number range, and this Das Gaspedal is not when be operated, and controls and closes vehicle load; Maybe work as this degree of vacuum and be less than the first default degree of vacuum, and automobile gear level is not when P shelves or N shelves state, controls and promotes engine idle rotating speed.
According to an embodiment of the present utility model, also comprise gearbox control, be connected with this electronic control unit, for making this electronic control unit obtain automobile gear level signal; This sensor assembly comprises for obtaining the vacuum sensor of vehicle vacuum booster degree of vacuum, for obtaining the car speed sensor of vehicle speed signal, for obtaining the pedal sensor of accelerator pedal signal.
According to an embodiment of the present utility model, also comprise compressor module, be connected with this electronic control unit, for closing or open air-conditioning according to the control of this electronic control unit.
According to an embodiment of the present utility model, also comprise electro heat module, be connected with this electronic control unit, for close or open back mirror electric heating system, rear window electric heating system according to the control of this electronic control unit.
According to an embodiment of the present utility model, this electronic control unit is also for receiving air-distributor pressure signal, and: calculate accordingly the residing sea level elevation of vehicle; Simultaneously, according to the degree of vacuum of this vehicle vacuum booster and this sea level elevation of calculating, judge whether both mate, if do not mate, carry out record; Or calculate accordingly the degree of vacuum of this air-distributor pressure, judge that the difference of the degree of vacuum of this air-distributor pressure and the degree of vacuum of this vehicle vacuum booster is whether in default scope, if not in this default scope, give the alarm.
According to an embodiment of the present utility model, this electronic control unit is also for closing in this vehicle load, and this degree of vacuum is less than in the situation of this first degree of vacuum, when automobile gear level is during in P shelves or N shelves, gives the alarm.
The utility model provides a kind of Matching and modification system of vehicle vacuum booster degree of vacuum, when vehicle vacuum booster low vacuum, by closing vehicle load or improving the degree of vacuum that idling speed is carried out lifting vehicle vacuum booster, thereby improve drive safety.For the traveling comfort of driving, above can be by closing vehicle load or improving the degree of vacuum that idling speed is carried out lifting vehicle vacuum booster just also can be limited to certain height above sea level.When vehicle vacuum booster degree of vacuum is lower, can first by closing load, carry out the degree of vacuum of lifting vehicle vacuum booster, if closed after load, degree of vacuum or low, by improving engine idle rotating speed, carry out again the degree of vacuum of lifting vehicle vacuum booster, so improve fuel economy.The utility model is in order further to improve the safety of driving, more added alarm control flow process, when whether the difference of the degree of vacuum of air-distributor pressure and the degree of vacuum of vehicle vacuum booster is in default scope, or when air-conditioning is in closed condition, automobile gear level, at N or P shelves, all can send warning when degree of vacuum is less than the first default degree of vacuum simultaneously.
By reading specification sheets, those of ordinary skills will understand feature and the content of these technical schemes better.
Accompanying drawing explanation
Below by describing particularly the utility model with reference to accompanying drawing and in conjunction with example, advantage of the present utility model and implementation will be more obvious, wherein content shown in accompanying drawing is only for explaining to of the present utility model, and do not form the restriction of going up in all senses of the present utility model, in the accompanying drawings:
Fig. 1 is the schematic diagram of the relation of change of atmospheric pressure and sea level elevation.
Fig. 2 is vacuum booster input-output characteristic figure.
Fig. 3 is the structural representation of the Matching and modification system of the utility model vehicle vacuum booster degree of vacuum.
Fig. 4 is the concrete structure schematic diagram of the Matching and modification system of the utility model vehicle vacuum booster degree of vacuum.
Fig. 5 is the step schematic diagram of the Matching and modification method of the utility model vehicle vacuum booster degree of vacuum.
Fig. 6 is the idiographic flow schematic diagram of the Matching and modification method of the utility model vehicle vacuum booster degree of vacuum.
Fig. 7 is the idiographic flow schematic diagram of the Matching and modification method of the utility model the first embodiment vehicle vacuum booster degree of vacuum.
Fig. 8 is the idiographic flow schematic diagram of the Matching and modification method of the utility model the second embodiment vehicle vacuum booster degree of vacuum.
Fig. 9 is the step schematic diagram of load control logic of the present utility model.
Figure 10 is the step schematic diagram of idle-speed control logic of the present utility model.
Figure 11 is the idiographic flow schematic diagram of the Matching and modification method of the utility model the 3rd embodiment vehicle vacuum booster degree of vacuum.
Figure 12 is the utility model alarm control schematic flow sheet.
The specific embodiment
Please refer to Fig. 2, Fig. 2 is vacuum booster input-output characteristic figure.Visible degree of vacuum is higher, and the output characteristic of servo-unit is better, and under the prerequisite of same Input Forces, power output is larger, and rate of braking is higher.Therefore at brake pedal force one regularly, the degree of vacuum that improves vacuum booster just can improve drive safety.
As shown in Figure 3, Figure 4, the utility model provides a kind of Matching and modification system of vehicle vacuum booster degree of vacuum, comprise: sensor assembly 10, for obtaining degree of vacuum, vehicle tach signal, accelerator pedal signal, the automobile gear level signal of vehicle vacuum booster; Electronic control unit 20, the signal sending for receiving this sensor assembly, for judging whether this degree of vacuum is less than the first default degree of vacuum; When this degree of vacuum is less than the first default degree of vacuum, vehicle speed is in default number range, and this Das Gaspedal is not when be operated, and controls and closes vehicle load; Maybe work as this degree of vacuum and be less than the first default degree of vacuum, and automobile gear level is not when P shelves or N shelves state, controls and promotes engine idle rotating speed.
In the specific implementation, the sensor module 10 can comprise vacuum sensor 11 for obtaining vehicle vacuum booster degree of vacuum, for obtaining the car speed sensor 12 of vehicle speed signal, for obtaining the accelerator pedal sensor 13 of accelerator pedal signal.Automobile gear level signal is by gearbox control 30(Transmission Control Unit, TCU) first reception sends to electronic control unit 20 again, that is gearbox control 30 is for making this electronic control unit 20 obtain automobile gear level signal, above-mentioned information can send to electronic control unit 20 by driving engine bus, in the utility model, electronic control unit 20 is exactly ECU(Electronic Control Unit).
In the present embodiment, also comprise compressor module 40, be connected with this electronic control unit 20, for closing or open air-conditioning according to the control of this electronic control unit.Also comprise electro heat module 50, be connected with this electronic control unit 20, for close or open back mirror electric heating system, rear window electric heating system according to the control of this electronic control unit.
In order further to promote the safety of driving, this electronic control unit 20 is also for closing in vehicle load, and this degree of vacuum is less than in the situation of this first degree of vacuum, if automobile gear level is in P shelves or N shelves, gives the alarm.
Referring to Fig. 5, Fig. 6, the utility model also provides a kind of Matching and modification method of vehicle vacuum booster degree of vacuum, comprising: S1, obtain the degree of vacuum of vehicle vacuum booster, and judge whether this degree of vacuum is less than the first default degree of vacuum; S2, when this degree of vacuum is less than the first default degree of vacuum, enter load control logic or idle-speed control logic; Wherein this load control logic comprises step: A1, obtain vehicle speed signal and accelerator pedal signal; A2, when the speed of a motor vehicle is in default number range and when this Das Gaspedal is not operated, close vehicle load; This idle-speed control logic comprises step: B1, obtain automobile gear level signal; B2, when automobile gear level is not during in P shelves or N shelves state, promote engine idle rotating speed.
Specifically, first, electronic control unit 20 obtains the degree of vacuum of vehicle vacuum booster, then judges whether degree of vacuum is less than the first default degree of vacuum, for example, be 20kpa, if be not less than 20kpa, stops; If be less than 20kpa, enter load control logic or idle-speed control logic.
If enter load control logic, electronic control unit 20 obtains vehicle speed signal and accelerator pedal signal again, now, if the speed of a motor vehicle is in default number range, in the present embodiment, default number range is 0.5km/h～40km/h, and Das Gaspedal is not operated, and vehicle is in idling mode, close load, such as closing vehicle air conditioning, back mirror electric heating system, rear window electric heating system etc., wherein again to close vehicle air conditioning, effect is the most remarkable.
If enter idle-speed control logic, electronic control unit 20 obtains automobile gear level signal again, judges that whether vehicle is in P shelves or N shelves, if vehicle is not in P shelves or N shelves, promotes engine idle rotating speed with the degree of vacuum of this lifting vehicle vacuum booster; If vehicle, in P shelves or N shelves, is reported to the police, but before warning, need first to determine that vehicle load is for example that air-conditioning is in closed condition.
In order further to promote the traveling comfort of driving, can in step S1, add step: obtain air-distributor pressure signal, and calculate accordingly the residing sea level elevation of this vehicle; When this sea level elevation is during higher than default minimum sea level elevation, just enter step S2.Its idiographic flow please refer to Fig. 7, and first, electronic control unit 20 obtains the degree of vacuum of vehicle vacuum booster, then judges whether degree of vacuum is less than the first default degree of vacuum, for example, be 20kpa, if be not less than 20kpa, stops; If be less than 20kpa, continue and obtain air-distributor pressure signal, and calculate accordingly the residing sea level elevation of this vehicle; When sea level elevation is for example 2000 meters higher than default minimum sea level elevation, enter load control logic or idle-speed control logic, otherwise just stop.Due in the present embodiment, as long as long as sea level elevation is higher than 2000 meters, the first degree of vacuum of its correspondence is exactly 20kpa, so now judge that sea level elevation is whether higher than default minimum sea level elevation and judge whether degree of vacuum is less than the first default degree of vacuum and does not have precedence relationship.
When adopting the Matching and modification method of vehicle vacuum booster degree of vacuum as shown in Figure 7, sea level elevation can be divided between several Altitude Regions as shown in table 1 below, and according to concrete braking requirement (demand to degree of vacuum while being car brakeing) to setting different vacuum booster vacuum ranges between different Altitude Regions, to bring into play to greatest extent the performance of motor vehicle braking system.Because the performance of different automobile types driving engine is different, the degree of vacuum that can provide is also different, thereby also different for degree of vacuum demand while braking.Contriver finds through lot of experiments, the domestic driving engine of the overwhelming majority is set to degree of vacuum corresponding to different altitude height according to table 1 to be verified, brake system can adapt to the demand of high height above sea level to greatest extent, and then the method providing according to the utility model operates the problem that can solve high altitude region brake system vacuum degree deficiency.Certainly, for imported engine, also can reference table 1 and according to actual conditions, set the corresponding relation (test can be found suitable corresponding relation through limited number of time) of sea level elevation scope and booster vacuum degree lock value scope.
Lower limit in following table 1 in vehicle vacuum booster vacuum ranges is this first degree of vacuum between this Altitude Region, and its higher limit is the second degree of vacuum, and as can be seen here, the second degree of vacuum is greater than the first degree of vacuum.
Table 1
| Between Altitude Region | Degree of vacuum is interval | The first degree of vacuum | The second degree of vacuum |
| 1000m～2000m | 40kpa～50kpa | 40kpa | 50kpa |
| 2000m～3500m | 20kpa～40kpa | 20kpa | 40kpa |
| 3500m～5000m | 10kpa～20kpa | 10kpa | 20kpa |
Certainly, also can be just by the interval unified 20kpa～40kpa that is made as of degree of vacuum more than minimum height above sea level, and be no longer divided between a plurality of Altitude Regions, because in the present embodiment, below minimum height above sea level, be not trigger load control logic in step S2 or idle-speed control logic.
In order to increase the safety of driving, in step S1, can also add step: the degree of vacuum that draws this air-distributor pressure according to air-distributor pressure calculated signals, judge that the difference of the degree of vacuum of this air-distributor pressure and the degree of vacuum of this vehicle vacuum booster is whether in default scope, if not in this default scope, give the alarm, to get rid of in advance the fault (such as pipeline breakage etc.) of booster system.Simultaneously can also be according to the degree of vacuum of this vehicle vacuum booster obtaining and this sea level elevation calculating, judge whether both mate, if do not mate, carry out record, for the degree of vacuum of later stage correction vehicle vacuum booster and the matching relationship of sea level elevation.
Referring again to Fig. 8, in the present embodiment, the triggering brake pedal signal of take is initial conditions, then electronic control unit 20 obtains the degree of vacuum of vehicle vacuum booster, continue and obtain air-distributor pressure signal, and calculate the degree of vacuum of induction maniflod, then the difference that judges the degree of vacuum of air-distributor pressure and the degree of vacuum of this vehicle vacuum booster whether in default scope, 15kpa for example, if this difference is greater than 15kpa, report to the police, because generally the Average True reciprocal of duty cycle of servo-unit all can be higher than mainfold vacuum degree, during engine operation, the instantaneous degree of vacuum of induction maniflod is than in the high situation of booster vacuum, capital raises booster vacuum degree, if within a certain period of time, 5S for example, booster vacuum degree is more much lower than mainfold vacuum degree, 15kpa for example, illustrate that pipeline has damaged gas leakage or vacuum booster to have gas leakage, check valve cannot be opened, therefore need to report to the police.
If the difference of the degree of vacuum of the degree of vacuum of air-distributor pressure and this vehicle vacuum booster, in default scope, draws the residing sea level elevation of this vehicle according to air-distributor pressure calculated signals again; Further according to the degree of vacuum of the vehicle vacuum booster obtaining with the corresponding diagram (being example as shown in Table 1) of degree of vacuum between Altitude Region and the sea level elevation calculating, judge whether both mate, if do not mate, carry out record, the result of record can be revised for the later stage matching relationship of degree of vacuum and the sea level elevation of vehicle vacuum booster; The record fruit that finishes, or after the degree of vacuum of definite vehicle vacuum booster mate with height above sea level, then judge whether sea level elevation is for example 2000 meters higher than default minimum sea level elevation, if not, with regard to termination; If so, just then judge whether degree of vacuum is less than the first default degree of vacuum.Now, need to be with reference to vacuum ranges corresponding between the Altitude Region of vehicle sea level elevation of living in, as shown in Table 1, if now vehicle sea level elevation of living in is 2500 meters, above-mentioned the first degree of vacuum is exactly 20kpa, if be less than 20kpa, enter load control logic or idle-speed control logic, otherwise just stop.In the present embodiment, due to different the first degree of vacuum corresponding to sea level elevation possibility, thus generally take first to judge sea level elevation, then judge whether degree of vacuum is less than the method for the first default degree of vacuum.
Referring again to Fig. 9, Fig. 9 is the step schematic diagram of load control logic of the present utility model.In the present embodiment, this load control logic, except steps A 1, A2, also comprises steps A 3, obtains degree of vacuum, vehicle speed signal and the accelerator pedal signal of vehicle vacuum booster; A4, be greater than the second default degree of vacuum when this degree of vacuum, for example, during 24kpa, the speed of a motor vehicle is in default number range, and this Das Gaspedal is not when be operated, and exits this load control logic, and wherein this second degree of vacuum is greater than this first degree of vacuum; When sea level elevation is divided between several Altitude Regions as shown in Table 1, this second degree of vacuum is exactly the higher limit in the degree of vacuum interval of correspondence between each Altitude Region.
Please refer to Figure 10, Figure 10 is the step schematic diagram of idle-speed control logic of the present utility model.In the present embodiment, idle-speed control logic also comprises step: B3, obtains the degree of vacuum of vehicle vacuum booster; B4, be less than this second degree of vacuum when this degree of vacuum, for example, during 24kpa, continue to promote this engine idle rotating speed, until this degree of vacuum is greater than this second degree of vacuum.
In situation due to vacuum degree deficiency, if directly enter idle-speed control logic, can affect to fuel economy, in order addressing the above problem, can to set step S2 and be specially: when this degree of vacuum is less than the first default degree of vacuum, be introduced into this load control logic, now: if this vehicle load, in opening, is closed this vehicle load, then obtain the degree of vacuum of vehicle vacuum booster, if this degree of vacuum is still less than this first degree of vacuum, enter idle-speed control logic.If this vehicle load in closed condition, enters this idle-speed control logic.
In the specific implementation, can take diagram of circuit as shown in figure 11, take and trigger brake pedal signal as initial conditions, then obtain air-distributor pressure signal, and calculate accordingly the residing sea level elevation of this vehicle; And judge that whether sea level elevation is for example 2000 meters higher than default minimum sea level elevation, if not, stops; If so, then obtain the degree of vacuum of vehicle vacuum booster, judge whether degree of vacuum is less than the first default degree of vacuum, for example, be 20kpa, if be not less than 20kpa, stop.
If degree of vacuum is less than the first default degree of vacuum, enter load control logic, first, obtain vehicle speed signal and accelerator pedal signal, now, if the speed of a motor vehicle is in default number range, in the present embodiment, default number range is 0.5km/h～40km/h, and Das Gaspedal is not operated, be vehicle in idling mode, due in the present embodiment, above-mentioned vehicle load is air-conditioning, so, need to then judge that whether air-conditioning is in opening, if air-conditioning, in opening, is closed air-conditioning; If air-conditioning is in closed condition, owing to having judged before that this degree of vacuum was less than the first default degree of vacuum, so, now to directly enter idle-speed control logic.
If air-conditioning is pent when opening, close after air-conditioning, also need again to obtain degree of vacuum, vehicle speed signal and the accelerator pedal signal of vehicle vacuum booster, then judge whether degree of vacuum is greater than the second degree of vacuum, whether the speed of a motor vehicle is in default scope, whether Das Gaspedal is operated, as long as of meeting in above-mentioned three just exits load control logic; That is to say while exiting and can no longer judge the speed of a motor vehicle and Das Gaspedal, as long as degree of vacuum is greater than the second degree of vacuum and directly exits, also can only obtain vehicle speed signal, as long as the speed of a motor vehicle does not directly exit in default scope yet, also can only obtain accelerator pedal signal, as long as Das Gaspedal is just operated, directly exit.If do not meet the above-mentioned condition that exits load control logic, then judge that whether this degree of vacuum is less than the first default degree of vacuum, if so, enters idle-speed control logic.
After entering idle-speed control logic, electronic control unit 20 obtains automobile gear level signal again, judge that whether vehicle is in P shelves or N shelves, if vehicle is not in P shelves or N shelves, promote engine idle rotating speed with the degree of vacuum of this lifting vehicle vacuum booster, when promoting, engine idle rotating speed can be promoted to 40rpm～170rpm at every turn, 50rpm for example, and then obtain the degree of vacuum of vehicle vacuum booster; When this degree of vacuum is less than the second degree of vacuum, continue to promote this engine idle rotating speed, for example promote 50rpm, until this degree of vacuum is greater than the second degree of vacuum, when degree of vacuum is greater than the second degree of vacuum, just can exit idle-speed control logic.
It should be noted that, when judging vehicle whether in P shelves or N shelves, if, need to send warning, because now air-conditioning is closed, and gear is while being in N shelves or P shelves, degree of vacuum is now can be lower than the first default degree of vacuum in principle, once occur that illustrative system has occurred that problem need to overhaul investigation.
Finally, please refer to Figure 12, Figure 12 is the utility model alarm control schematic flow sheet.In the utility model, in Fig. 7 and Figure 10, all mentioned warning, in order to promote drive safety, fixedly the frequency detects so that and alarm.Specifically, first, fixedly the frequency is obtained vehicle vacuum booster degree of vacuum, air-distributor pressure signal, automobile gear level signal, and whether the difference that then judges the degree of vacuum of air-distributor pressure and the degree of vacuum of vehicle vacuum booster in default scope, for example, is less than 15kpa; If so, just wait for detection next time; If not, need to report to the police and storage failure code.
Can also judge whether degree of vacuum is less than the first default degree of vacuum simultaneously, now need first to determine that air-conditioning closes, automobile gear level is at N or P shelves, that is to say, when air-conditioning is in closed condition, automobile gear level is at N or P shelves, and degree of vacuum is less than the first default degree of vacuum simultaneously, just reports to the police and storage failure code; Otherwise, wait for detection next time.
The utility model provides a kind of Matching and modification system of vehicle vacuum booster degree of vacuum, when vehicle vacuum booster degree of vacuum is lower, by closing load or improving the degree of vacuum that engine idle rotating speed carrys out lifting vehicle vacuum booster, thereby increase power output, make rate of braking higher, increase the safety of driving; In order to increase the traveling comfort of driving, can add minimum sea level elevation as limiting condition, only when higher than minimum sea level elevation, just can be by closing load or improving the degree of vacuum that engine idle rotating speed carrys out lifting vehicle vacuum booster; In order to take into account the problem of fuel economy simultaneously, when vehicle vacuum booster degree of vacuum is lower, can first by closing load, carry out the degree of vacuum of lifting vehicle vacuum booster, if closed after load, degree of vacuum or low, then by improving engine idle rotating speed, carry out the degree of vacuum of lifting vehicle vacuum booster.The utility model is in order further to improve the safety of driving, more added alarm control flow process, when whether the difference of the degree of vacuum of air-distributor pressure and the degree of vacuum of vehicle vacuum booster is in default scope, or when air-conditioning is in closed condition, automobile gear level is at N or P shelves, when degree of vacuum is less than the first default degree of vacuum simultaneously, all can send warning, with reminding user.
With reference to the accompanying drawings of preferred embodiment of the present utility model, those skilled in the art do not depart from scope of the present utility model and essence above, can have multiple flexible program to realize the utility model.For example, the feature that illustrates or describe as the part of an embodiment can be used for another embodiment to obtain another embodiment.These are only the better feasible embodiment of the utility model, not thereby limit to interest field of the present utility model, the equivalence that all utilization the utility model specification sheetss and accompanying drawing content are done changes, within being all contained in interest field of the present utility model.
Claims (6)
1. a Matching and modification system for vehicle vacuum booster degree of vacuum, is characterized in that, comprising:
Sensor assembly, for obtaining degree of vacuum, vehicle speed signal, the accelerator pedal signal of vehicle vacuum booster;
Electronic control unit, the signal sending for receiving automobile gear level signal and described sensor assembly, and judge whether described degree of vacuum is less than the first default degree of vacuum; When described degree of vacuum is less than the first default degree of vacuum, vehicle speed is in default number range, and described Das Gaspedal is not when be operated, and controls and closes vehicle load; Or be less than the first default degree of vacuum when described degree of vacuum, and automobile gear level is not when P shelves or N shelves state, controls and promotes engine idle rotating speed.
2. the Matching and modification system of vehicle vacuum booster degree of vacuum according to claim 1, is characterized in that, also comprises gearbox control, is connected, for making described electronic control unit obtain automobile gear level signal with described electronic control unit; Described sensor assembly comprises for obtaining the vacuum sensor of vehicle vacuum booster degree of vacuum, for obtaining the car speed sensor of vehicle speed signal, for obtaining the pedal sensor of accelerator pedal signal.
3. the Matching and modification system of vehicle vacuum booster degree of vacuum according to claim 1, is characterized in that, also comprises compressor module, is connected, for closing or open air-conditioning according to the control of described electronic control unit with described electronic control unit.
4. the Matching and modification system of vehicle vacuum booster degree of vacuum according to claim 1, it is characterized in that, also comprise electro heat module, be connected with described electronic control unit, for close or open back mirror electric heating system, rear window electric heating system according to the control of described electronic control unit.
5. the Matching and modification system of vehicle vacuum booster degree of vacuum according to claim 1, is characterized in that, described electronic control unit also receives air-distributor pressure signal, and:
Calculate accordingly the residing sea level elevation of vehicle; Simultaneously, according to the degree of vacuum of described vehicle vacuum booster and the described sea level elevation that calculates, judge whether both mate, if do not mate, carry out record; Or
Calculate accordingly the degree of vacuum of described air-distributor pressure, judge that the difference of the degree of vacuum of described air-distributor pressure and the degree of vacuum of described vehicle vacuum booster is whether in default scope, if not in described default scope, give the alarm.
6. the Matching and modification system of vehicle vacuum booster degree of vacuum according to claim 1, it is characterized in that, described electronic control unit is also closed in described vehicle load, and described degree of vacuum is less than in the situation of described the first degree of vacuum, when automobile gear level is during in P shelves or N shelves, give the alarm.
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| CN201320592581.3U CN203496882U (en) | 2013-09-24 | 2013-09-24 | Vacuum degree matching and adjusting system for vehicle vacuum booster |
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| CN201320592581.3U CN203496882U (en) | 2013-09-24 | 2013-09-24 | Vacuum degree matching and adjusting system for vehicle vacuum booster |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104442773A (en) * | 2013-09-24 | 2015-03-25 | 广州汽车集团股份有限公司 | Method and system for matching and adjusting vacuum degree of vacuum booster of vehicle |
| CN105673225A (en) * | 2014-12-03 | 2016-06-15 | 福特环球技术公司 | System and method for improving vacuum generation |
| CN106080565A (en) * | 2016-07-06 | 2016-11-09 | 北京长安汽车工程技术研究有限责任公司 | The control method of a kind of pure electric vehicle vacuum boost system and device |
| CN107458368A (en) * | 2017-07-26 | 2017-12-12 | 北京汽车股份有限公司 | Control method, system and the vehicle of vehicle |
| WO2020094398A1 (en) * | 2018-11-08 | 2020-05-14 | Robert Bosch Gmbh | Method for changing a characteristic curve of an accelerator pedal of a motor vehicle and characteristic-curve-changing device for a motor vehicle |
-
2013
- 2013-09-24 CN CN201320592581.3U patent/CN203496882U/en not_active Expired - Lifetime
Cited By (6)
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| CN104442773A (en) * | 2013-09-24 | 2015-03-25 | 广州汽车集团股份有限公司 | Method and system for matching and adjusting vacuum degree of vacuum booster of vehicle |
| CN104442773B (en) * | 2013-09-24 | 2018-02-23 | 广州汽车集团股份有限公司 | The Matching and modification method and its system of vehicle vacuum brake booster vacuum |
| CN105673225A (en) * | 2014-12-03 | 2016-06-15 | 福特环球技术公司 | System and method for improving vacuum generation |
| CN106080565A (en) * | 2016-07-06 | 2016-11-09 | 北京长安汽车工程技术研究有限责任公司 | The control method of a kind of pure electric vehicle vacuum boost system and device |
| CN107458368A (en) * | 2017-07-26 | 2017-12-12 | 北京汽车股份有限公司 | Control method, system and the vehicle of vehicle |
| WO2020094398A1 (en) * | 2018-11-08 | 2020-05-14 | Robert Bosch Gmbh | Method for changing a characteristic curve of an accelerator pedal of a motor vehicle and characteristic-curve-changing device for a motor vehicle |
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