CN104442773B - The Matching and modification method and its system of vehicle vacuum brake booster vacuum - Google Patents
The Matching and modification method and its system of vehicle vacuum brake booster vacuum Download PDFInfo
- Publication number
- CN104442773B CN104442773B CN201310455019.0A CN201310455019A CN104442773B CN 104442773 B CN104442773 B CN 104442773B CN 201310455019 A CN201310455019 A CN 201310455019A CN 104442773 B CN104442773 B CN 104442773B
- Authority
- CN
- China
- Prior art keywords
- vacuum
- vehicle
- booster
- default
- matching
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/72—Electrical control in fluid-pressure brake systems in vacuum systems or vacuum booster units
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The present invention, which provides a kind of Matching and modification method of vehicle vacuum brake booster vacuum and its system, this method, to be included：S1, the vacuum for obtaining vehicle vacuum booster, and judge whether the vacuum is less than default first vacuum；S2, when the vacuum is less than default first vacuum, then enter load control logic or idle speed control logic；Wherein the load control logic includes step：A1, obtain GES and accelerator pedal signal；A2, when speed is in default number range and the gas pedal is not operated, then close vehicle load；The idle speed control logic includes step：B1, obtain vehicle shift signal；B2, when vehicle gear be not at P gear or N gear state when, lifted engine idle rotational.The present invention loads or improved engine idle rotational to lift the vacuum of vehicle vacuum booster by closing, and so as to increase power output, makes severity of braking higher, increases the security of driving.
Description
Technical field
The present invention relates to technical field of vehicle, more particularly to a kind of Matching and modification method of vehicle vacuum brake booster vacuum
And its system.
Background technology
With the development of passenger car technology, customer starts more on the basis of the basic performances such as comfortableness, dynamic property are met
Pay attention to the security of car, more and more higher is required for vehicle braking performances.Most of car uses vacuum booster,
It is used in combination manpower and power.The vacuum source of the brakes vacuum booster unit of traditional combustion engine car comes from engine charge
Manifold.The manifold air pressure of inlet manifold and the difference of atmospheric pressure are vacuum.
Vacuum booster is generally mounted between brake pedal and master cylinder, is directly manipulated by push rod by pedal.Help
Power device is superimposed with power caused by pedal and acted on master cylinder push rod, to improve the output pressure of master cylinder.Very
The servo vacuum air chamber of empty booster is divided into atmospheric chamber and pressure change chamber by the piston with rubber diaphragm, general atmospheric chamber it is true
Reciprocal of duty cycle is 0.6Bar~0.8Bar.The size that vacuum booster can be provided power-assisted depends on its atmospheric chamber and pressure change chamber draught head
The size of value.When the vacuum of pressure change chamber reaches external atmosphere pressure, vacuum booster can provide the brake boost of maximum.
In order to improve the comfortableness of vehicle and convenient driving, on contemporary automotive powerful air-conditioning, automatic gear-box,
Rearview mirror electrical heating, rear window heating have become standard configuration, which results in the absolute pressure more and more higher of inlet manifold, together
When more and more higher required due to vehicle economy, the engine of small displacement turns into the trend of development of automobile, in order to meet vehicle
The requirement of comfortableness and convenient driving, vacuum influence the security driven to the trend development being gradually reduced.
It is well known that relation can be represented with relational expression as follows between atmospheric pressure and height above sea level：
Wherein:P0 is standard atmospheric pressure, equal to 1013.25 mbar；Altitude is the height above sea level in units of rice；
P is the air pressure in units of mbar in a certain height.
Fig. 1 is refer to, Fig. 1 describes the relation of change of atmospheric pressure and height above sea level according to formula above.Such as Fig. 1 institutes
Show, when height is 11,000 meter high to height above sea level from sea level rise, atmospheric pressure drops to 230 mbar from 1013.25 mbar.I
Be not difficult to find out from figure, when height be less than 1,500 meters when, atmospheric pressure almost linearly reduces, and every 100 meters about reduce
11.2 mbar, i.e., every 10 meters about reduce by 1.1 mbar.
So how vacuum boost system allows vacuum servo while brake provides power-assisted under meeting nominal situation
It is also the problem that current car designer faces that system, which provides efficient power-assisted in high altitude localities,.Because with height above sea level
The continuous rising of degree, atmospheric pressure is in downward trend, now will be unable to provide enough vacuum to vacuum boost system, especially
Under the work of its engine high load, vacuum boost system can not more meet the needs of brakes, and brake pedal force significantly increases,
Severe compromise be present.
The content of the invention
The features and advantages of the present invention partly state in the following description, or can from the description it is clear that or
Person can be learnt by putting into practice the present invention.
To overcome problem of the prior art, the present invention provides a kind of Matching and modification method of vehicle vacuum brake booster vacuum
And its system, when vehicle vacuum brake booster vacuum is low, vehicle is lifted by closing vehicle load or improving idling speed
The vacuum of vacuum booster, so as to improve drive safety.
Technical scheme is as follows used by the present invention solves above-mentioned technical problem：
According to an aspect of the present invention, there is provided a kind of Matching and modification method of vehicle vacuum brake booster vacuum, including：
S1, the vacuum for obtaining vehicle vacuum booster, and judge whether the vacuum is less than default first vacuum；S2, when this
When vacuum is less than default first vacuum, then enter load control logic or idle speed control logic；Wherein the load controls
Logic includes step：A1, obtain GES and accelerator pedal signal；A2, be in default number range when speed and
When gas pedal is not operated, then vehicle load is closed；The idle speed control logic includes step：B1, obtain vehicle shift signal；
B2, when vehicle gear be not at P gear or N gear state when, lifted engine idle rotational.
According to one embodiment of present invention, step is also included in step S1：Air- distributor pressure signal is obtained, and
The height above sea level residing for the vehicle is calculated accordingly；When the height above sea level is higher than default minimum height above sea level, into this
Step S2.
According to one embodiment of present invention, all height above sea levels are divided into several height above sea level sections, according to braking requirement
Different vehicle vacuum brake booster vacuum scopes, wherein the vehicle vacuum brake booster vacuum are set to different height above sea level sections
Lower limit in scope is first vacuum in the height above sea level section.
According to one embodiment of present invention, also include in step S1：According to the vehicle vacuum booster of acquisition
Vacuum and the height above sea level that is calculated, judge whether both match, if mismatching, recorded.
According to one embodiment of present invention, step is also included in step S1：According to air- distributor pressure signal meter
Calculate and draw the vacuum of the air- distributor pressure, judge the true of the vacuum of the air- distributor pressure and the vehicle vacuum booster
Whether the difference of reciprocal of duty cycle is in default scope, if not sending alarm in the default scope.
According to one embodiment of present invention, in step S2, when the vacuum is less than default first vacuum,
The load control logic is introduced into, now：If the vehicle load is in opening, the vehicle load is closed, is then obtained
The vacuum of vehicle vacuum booster, if the vacuum is also less than first vacuum, into idle speed control logic.If should
Vehicle load is closed, then into the idle speed control logic.
According to one embodiment of present invention, the load control logic also includes step：A3, obtain vehicle vacuum booster
Vacuum, GES and accelerator pedal signal；If A4, the vacuum are more than default second vacuum, or at speed
In in default number range, or when the gas pedal is not operated, then the load control logic is exited, wherein second vacuum
Degree is more than first vacuum；The idle speed control logic also includes step：B3, the vacuum for obtaining vehicle vacuum booster；B4、
When the vacuum is less than second vacuum, continue to lift up the engine idle rotational, until the vacuum be more than this second
Vacuum.
According to one embodiment of present invention, also include in the step B2 of the idle speed control logic：It is turned off in load, and
In the case that the vacuum is less than first vacuum, if vehicle gear is in P gears or N gears, alarm is sent.
According to one embodiment of present invention, the vehicle load includes air-conditioning, rearview mirror electric heating system, rear window electrical heating
System.
According to another aspect of the present invention, there is provided a kind of Matching and modification system of vehicle vacuum brake booster vacuum, bag
Include：Sensor assembly, for obtaining the vacuum of vehicle vacuum booster, GES, accelerator pedal signal；Electronic Control list
Member, the signal sent for receiving vehicle shift signal and the sensor assembly, and it is default to judge whether the vacuum is less than
The first vacuum；When the vacuum is less than default first vacuum, vehicle speed is in default number range, and should
When gas pedal is not operated, vehicle load is closed in control；Or when the vacuum is less than default first vacuum, and vehicle gear
When position is not at P gears or N gear states, control lifting engine idle rotational.
According to one embodiment of present invention, in addition to gearbox control, it is connected with the electronic control unit, for making
The electronic control unit obtains vehicle shift signal；The sensor assembly includes being used to obtain vehicle vacuum brake booster vacuum
Vacuum sensor, for obtaining the vehicle speed sensor of GES, for obtaining the pedal sensor of accelerator pedal signal.
According to one embodiment of present invention, in addition to compressor module, it is connected with the electronic control unit, for basis
The control of the electronic control unit turns off or on air-conditioning.
According to one embodiment of present invention, in addition to electrical heating module, it is connected with the electronic control unit, for basis
The control of the electronic control unit turns off or on rearview mirror electric heating system, rear window electric heating system.
According to one embodiment of present invention, the electronic control unit is additionally operable to receive air- distributor pressure signal, and：According to
The height above sea level residing for vehicle is calculated in this；Simultaneously according to the vacuum of the vehicle vacuum booster and be calculated should
Height above sea level, judges whether both match, if mismatching, is recorded；Or the air- distributor pressure is calculated accordingly
Vacuum, judge the vacuum of the air- distributor pressure with the difference of the vacuum of the vehicle vacuum booster whether default
In the range of, if not sending alarm in the default scope.
According to one embodiment of present invention, the electronic control unit is additionally operable to be turned off in the vehicle load, and this is true
In the case that reciprocal of duty cycle is less than first vacuum, when vehicle gear is in P gears or N is kept off, alarm is sent.
The invention provides a kind of Matching and modification method of vehicle vacuum brake booster vacuum and its system, work as vehicle vacuum
When brake booster vacuum is low, the vacuum of vehicle vacuum booster is lifted by closing vehicle load or improving idling speed,
So as to improve drive safety.In order to the comfortableness of driving, can be by closing car just can also be limited to more than certain height above sea level
Load improves idling speed and lifts the vacuum of vehicle vacuum booster.It is relatively low in vehicle vacuum brake booster vacuum
When, closing load can be first passed through to lift the vacuum of vehicle vacuum booster, after load, vacuum is still
It is low, then the vacuum of vehicle vacuum booster is lifted by improving engine idle rotational, so improve fuel economy.This
Invention more adds controlling alarm flow to further improve the security of driving, when air- distributor pressure vacuum with
When whether the difference of the vacuum of vehicle vacuum booster is in default scope, or when air-conditioning is closed, vehicle is kept off
Position is kept off in N or P, while can all send alarm when vacuum is less than default first vacuum.
By reading specification, the feature of these technical schemes and interior will be best understood in those of ordinary skill in the art
Hold.
Brief description of the drawings
The present invention is specifically described below with reference to accompanying drawing and with reference to example, advantages of the present invention and implementation will
More obvious, wherein content is only used for explanation of the present invention shown in accompanying drawing, without forming to the present invention in all senses
On limitation, in the accompanying drawings：
Fig. 1 is the schematic diagram of the relation of change of atmospheric pressure and height above sea level.
Fig. 2 is vacuum booster input-output characteristic figure.
Fig. 3 is the structural representation of the Matching and modification system of vehicle vacuum brake booster vacuum of the present invention.
Fig. 4 is the concrete structure schematic diagram of the Matching and modification system of vehicle vacuum brake booster vacuum of the present invention.
Fig. 5 is the step schematic diagram of the Matching and modification method of vehicle vacuum brake booster vacuum of the present invention.
Fig. 6 is the idiographic flow schematic diagram of the Matching and modification method of vehicle vacuum brake booster vacuum of the present invention.
Fig. 7 is that the idiographic flow of the Matching and modification method of first embodiment of the invention vehicle vacuum brake booster vacuum shows
It is intended to.
Fig. 8 is that the idiographic flow of the Matching and modification method of second embodiment of the invention vehicle vacuum brake booster vacuum shows
It is intended to.
Fig. 9 is the step schematic diagram of the load control logic of the present invention.
Figure 10 is the step schematic diagram of the idle speed control logic of the present invention.
Figure 11 is that the idiographic flow of the Matching and modification method of third embodiment of the invention vehicle vacuum brake booster vacuum shows
It is intended to.
Figure 12 is controlling alarm schematic flow sheet of the present invention.
Embodiment
Fig. 2 is refer to, Fig. 2 is vacuum booster input-output characteristic figure.It can be seen that vacuum is higher, the output of booster
Characteristic is better, and on the premise of same input power, power output is bigger, and severity of braking is higher.Therefore in brake pedal force one regularly,
The vacuum can for improving vacuum booster improves drive safety.
As shown in Figure 3, Figure 4, the present invention provides a kind of Matching and modification system of vehicle vacuum brake booster vacuum, including：
Sensor assembly 10, for obtaining the vacuum of vehicle vacuum booster, vehicle tach signal, accelerator pedal signal, vehicle gear
Position signal；Electronic control unit 20, the signal sent for receiving the sensor assembly, for judging whether the vacuum is less than
Default first vacuum；When the vacuum is less than default first vacuum, vehicle speed is in default number range,
And the gas pedal, when not being operated, vehicle load is closed in control；Or when the vacuum is less than default first vacuum, and car
When gear is not at P gears or N gear states, control lifting engine idle rotational.
In the specific implementation, the sensor module 10 can include being used to obtain vehicle vacuum brake booster vacuum
Vacuum sensor 11, the vehicle speed sensor 12 for obtaining vehicle speed signal, the throttle for obtaining accelerator pedal signal
Pedal sensor 13.And vehicle shift signal is then by gearbox control 30（Transmission Control Unit,
TCU）First receive and be then forwarded to electronic control unit 20, that is, gearbox control 30 is used to make the electronic control unit 20
Vehicle shift signal is obtained, above- mentioned information can be sent to electronic control unit 20 by engine bus, in the present invention, electricity
Sub-control unit 20 is exactly ECU（Electronic Control Unit）.
In the present embodiment, in addition to compressor module 40, it is connected with the electronic control unit 20, for according to the electricity
The control of sub-control unit turns off or on air-conditioning.Also include electrical heating module 50, be connected with the electronic control unit 20, use
In turning off or on rearview mirror electric heating system, rear window electric heating system according to the control of the electronic control unit.
Electronic control unit 20 is additionally operable to obtain air- distributor pressure signal, and the sea residing for the vehicle is calculated accordingly
Degree of lifting；And according to the vacuum of the vehicle vacuum booster and the height above sea level being calculated, judge whether both match,
If mismatching, carry out record and be used for the vacuum of later stage amendment vehicle vacuum booster and the matching relationship of height above sea level.
Electronic control unit 20 is additionally operable to draw the vacuum of the air- distributor pressure according to air- distributor pressure signal of change
Degree, the difference of the vacuum of air- distributor pressure and the vacuum of vehicle vacuum booster is judged whether in default scope,
If alarm is not sent in the default scope.
In order to further lift the security of driving, the electronic control unit 20 is additionally operable to be turned off in vehicle load, and
In the case that the vacuum is less than first vacuum, if vehicle gear is in P gears or N gears, alarm is sent.
Referring to Fig. 5, Fig. 6, the present invention also provides a kind of Matching and modification side of vehicle vacuum brake booster vacuum
Method, including：S1, the vacuum for obtaining vehicle vacuum booster, and judge whether the vacuum is less than default first vacuum；
S2, when the vacuum is less than default first vacuum, then enter load control logic or idle speed control logic；Wherein this is negative
Carrying control logic includes step：A1, obtain GES and accelerator pedal signal；A2, it is in default numerical value model when speed
In enclosing and when the gas pedal is not operated, then vehicle load is closed；The idle speed control logic includes step：B1, obtain vehicle
Shift signal；B2, when vehicle gear be not at P gear or N gear state when, lifted engine idle rotational.
Specifically, first, electronic control unit 20 obtains the vacuum of vehicle vacuum booster, then judges vacuum
Whether degree is less than default first vacuum, e.g. 20kpa, if being not less than 20kpa, terminates；If less than
20kpa, then enter load control logic or idle speed control logic.
If entering load control logic, electronic control unit 20 obtains GES and accelerator pedal signal again,
Now, if speed is in default number range, in the present embodiment, default number range is 0.5 km/h~40
Km/h, and gas pedal is not operated, i.e., vehicle is in idling mode, then closes load, such as close vehicle air conditioning, rearview mirror
Electric heating system, rear window electric heating system etc., wherein again to close vehicle air conditioning, effect is the most notable.
If into idle speed control logic, electronic control unit 20 obtains vehicle shift signal again, whether judges vehicle
In P gears or N gears, if vehicle is not on P gears or N gears, it is true that lifting engine idle rotational with this lifts vehicle
The vacuum of empty booster；If vehicle is in P gears or N gears, alarmed, but need first to determine that vehicle is born before alarm
E.g. air-conditioning is carried to be closed.
In order to further lift the comfortableness of driving, step can be added in step sl：Obtain air- distributor pressure letter
Number, and the height above sea level residing for the vehicle is calculated accordingly；When the height above sea level is higher than default minimum height above sea level,
Into step S2.Its idiographic flow refer to Fig. 7, and first, electronic control unit 20 obtains the vacuum of vehicle vacuum booster
Degree, then judges whether vacuum is less than default first vacuum, e.g. 20kpa, if being not less than 20kpa, terminates；
If less than 20kpa, then continue and obtain air- distributor pressure signal, and the height above sea level residing for the vehicle is calculated accordingly；
When height above sea level higher than default minimum height above sea level is, for example, 2000 meters, then enter load control logic or idle speed control
Logic, otherwise just terminate.Due in the present embodiment, as long as long as height above sea level is higher than 2000 meters, its corresponding first vacuum
Degree is exactly 20kpa, so now judging whether height above sea level is higher than default minimum height above sea level and whether judges vacuum
Do not have precedence relationship less than default first vacuum.
, can be by height above sea level when using the Matching and modification method of vehicle vacuum brake booster vacuum as shown in Figure 7
It is divided into several height above sea level sections as shown in table 1 below, and according to specific braking requirement（To the need of vacuum when i.e. vehicle is braked
Ask）Different vacuum booster vacuum ranges are set to different height above sea level sections, to play vehicle braking system to greatest extent
The performance of system.Because the performance of different automobile types engine is different, using the teaching of the invention it is possible to provide vacuum it is also different, for true during so as to brake
Reciprocal of duty cycle demand is also different.Inventor is had found by lot of experiments, and different seas are set according to table 1 to most national engines
Vacuum is verified corresponding to degree of lifting, and brakes can adapt to the demand of High aititude to greatest extent, and then according to
Method provided by the invention, which carries out operation, can solve the problems, such as high altitude localities brakes vacuum degree deficiency.Certainly, for
Imported engine, also refer to table 1 and set height above sea level scope and brake booster vacuum lock value scope according to actual conditions
Corresponding relation（Suitable corresponding relation can be found by limited number of time experiment）.
In table 1 below the lower limit in vehicle vacuum brake booster vacuum scope be in the height above sea level section this is first true
Reciprocal of duty cycle, and its higher limit is then the second vacuum, it can be seen that, the second vacuum is greater than the first vacuum.
Table 1
| Height above sea level section | Vacuum section | First vacuum | Second vacuum |
| 1000m~2000m | 40kpa~50kpa | 40kpa | 50kpa |
| 2000m~3500m | 20kpa~40kpa | 20kpa | 40kpa |
| 3500m~5000m | 10kpa~20kpa | 10kpa | 20kpa |
It is of course also possible to which vacuum section is uniformly just set into 20kpa~40kpa more than minimum height above sea level, and no longer will
It is divided into multiple height above sea level sections, is that will not trigger the load control in step S2 below minimum height above sea level because in the present embodiment
Logic or idle speed control logic.
In order to increase the security of driving, step can also be added in step sl：According to air- distributor pressure signal meter
Calculate and draw the vacuum of the air- distributor pressure, judge the true of the vacuum of the air- distributor pressure and the vehicle vacuum booster
Whether the difference of reciprocal of duty cycle is in default scope, if alarm is not sent in the default scope, to exclude booster in advance
The failure of system（Such as pipeline breakage etc.）.Simultaneously can also be according to the vacuum and meter of the vehicle vacuum booster of acquisition
The height above sea level drawn, judges whether both match, if mismatching, is recorded, and vehicle vacuum is corrected for the later stage
The vacuum of booster and the matching relationship of height above sea level.
Referring again to Fig. 8, in the present embodiment, to trigger brake pedal signal as initial conditions, then Electronic Control list
Member 20 obtains the vacuum of vehicle vacuum booster, continues and obtains air- distributor pressure signal, and calculates the true of inlet manifold
Reciprocal of duty cycle, then judges whether the difference of the vacuum of air- distributor pressure and the vacuum of the vehicle vacuum booster is being preset
In the range of, such as 15kpa if the difference is more than 15kpa, alarmed, because generally booster is averaged
Vacuum all can be higher than manifold vacuum, and when engine works, the instantaneous vacuum of inlet manifold is higher than booster vacuum
In the case of, it can all raise brake booster vacuum, if within a certain period of time, such as 5S, brake booster vacuum compare manifold vacuum
Much lower, such as 15kpa is spent, then illustrates that pipeline has damaged gas leakage or vacuum booster to have gas leakage, check valve not to open, because
This needs to alarm.
If the difference of the vacuum of air- distributor pressure and the vacuum of the vehicle vacuum booster is in default scope
It is interior, then draw the height above sea level residing for the vehicle further according to air- distributor pressure signal of change；Further according to height above sea level section with
The corresponding diagram of vacuum（Exemplified by as shown in Table 1）The vacuum of the vehicle vacuum booster of acquisition and the sea being calculated
Degree of lifting, judges whether both match, if mismatching, is recorded, and it is true that the result of record can be used for later stage amendment vehicle
The vacuum of empty booster and the matching relationship of height above sea level；The fruit that finishes is recorded, or determines the vacuum of vehicle vacuum booster
After being matched with height above sea level, then judge whether height above sea level is, for example, 2000 meters higher than default minimum height above sea level, if it is not,
With regard to terminating；If it is, just then judging whether vacuum is less than default first vacuum.At this time, it may be necessary to reference to residing for vehicle
Vacuum ranges corresponding to the height above sea level section of height above sea level, as shown in Table 1, if now height above sea level residing for vehicle is
2500 meters, then above-mentioned first vacuum is exactly 20kpa, if less than 20kpa, then enters load control logic or idle speed control
Logic, otherwise just terminate.In the present embodiment, because different height above sea levels may correspond to the first different vacuum, so
General take first judges height above sea level, then judges whether vacuum is less than the method for default first vacuum.
Referring again to Fig. 9, Fig. 9 is the step schematic diagram of the load control logic of the present invention.In the present embodiment, the load
Control logic is in addition to step A1, A2, in addition to step A3, the vacuum, GES and the oil that obtain vehicle vacuum booster
Door pedal signal；A4, it is more than default second vacuum when the vacuum, such as during 24kpa, speed is in default numerical value model
In enclosing, and when the gas pedal is not operated, the load control logic is exited, wherein second vacuum is more than first vacuum
Degree；When height above sea level is divided into several height above sea level sections as listed in Table 1, second vacuum is exactly each height above sea level section pair
The higher limit in the vacuum section answered.
Figure 10 is refer to, Figure 10 is the step schematic diagram of the idle speed control logic of the present invention.In the present embodiment, idling control
Logic processed also includes step：B3, the vacuum for obtaining vehicle vacuum booster；B4, it is less than second vacuum when the vacuum,
Such as during 24kpa, the engine idle rotational is continued to lift up, until the vacuum is more than second vacuum.
In the case of due to vacuum degree deficiency, if being directly entered idle speed control logic, fuel economy can be caused necessarily
Influence, in order to solve the above problems, can be specially with setting procedure S2：When the vacuum is less than default first vacuum
When, the load control logic is introduced into, now：If the vehicle load is in opening, the vehicle load is closed, is then obtained
The vacuum of a pick-up vacuum booster, if the vacuum is also less than first vacuum, into idle speed control logic.If
The vehicle load is closed, then into the idle speed control logic.
In the specific implementation, can take as illustrated in flow chart figure 11, to trigger brake pedal signal as initial conditions,
Then air- distributor pressure signal is obtained, and the height above sea level residing for the vehicle is calculated accordingly；And judge that height above sea level is
No higher than default minimum height above sea level is, for example, 2000 meters, if it is not, then terminating；If it is, then obtain vehicle vacuum
The vacuum of booster, judges whether vacuum is less than default first vacuum, e.g. 20kpa, if be not less than
20kpa, then terminate.
If vacuum is less than default first vacuum, enter load control logic, first, obtain GES with
And accelerator pedal signal, now, if speed is in default number range, in the present embodiment, default number range
For the km/h of 0.5 km/h~40, and gas pedal is not operated, i.e., vehicle is in idling mode, due in the present embodiment,
Above-mentioned vehicle load is air-conditioning, it is therefore desirable to then judge whether air-conditioning is in opening, if air-conditioning is in opening state
State, then close air-conditioning；If air-conditioning is closed, due to before it is determined that the vacuum excessively is true less than default first
Reciprocal of duty cycle, so, to be now directly entered idle speed control logic.
If air-conditioning is pent in opening, after closing air-conditioning, it is also necessary to obtain vehicle vacuum again and help
Vacuum, GES and the accelerator pedal signal of power device, then judge whether vacuum is more than the second vacuum, and speed is
No whether gas pedal is operated in default scope, as long as one that meets in above-mentioned three is just exited load control and patrolled
Volume；Speed and gas pedal can be no longer judged when that is exiting, as long as vacuum is then directly moved back more than the second vacuum
Go out, can also only obtain GES, as long as speed does not also exit directly in default scope, can also only obtain gas pedal
Signal, just directly exited as long as gas pedal is operated.If being unsatisfactory for the above-mentioned condition for exiting load control logic, then sentence
Whether the vacuum of breaking is less than default first vacuum, if it is, into idle speed control logic.
After idle speed control logic is entered, electronic control unit 20 obtains vehicle shift signal again, judges whether vehicle is located
In P gears or N gears, if vehicle is not on P gears or N gears, lifting engine idle rotational lifts vehicle vacuum with this
The vacuum of booster, in lifting, engine idle rotational can be lifted to 40rpm~170rpm, such as 50rpm every time,
Then the vacuum of vehicle vacuum booster is obtained again；When the vacuum is less than the second vacuum, continues to lift up this and start
Machine idling speed, such as 50rpm is lifted, until the vacuum is more than the second vacuum, when vacuum is more than the second vacuum,
Can exits idle speed control logic.
It should be noted that when judging whether vehicle keeps off in P gears or N, if it is, need to send alarm, because
Be closed for now air-conditioning, and when gear is in N gears or P is kept off, vacuum now be essentially be not less than it is default
First vacuum, once explanation system occur there is a problem that needs overhaul investigation.
Finally, Figure 12 is refer to, Figure 12 is controlling alarm schematic flow sheet of the present invention.In the present invention, Fig. 7 and Figure 10
In all refer to alarm, in order to lift drive safety, can fix the frequency detected so as to and alarm.Specifically,
First, the fixed frequency obtains vehicle vacuum brake booster vacuum, air- distributor pressure signal, vehicle shift signal, then judges
Whether the difference of the vacuum of air- distributor pressure and the vacuum of vehicle vacuum booster be, for example, less than in default scope
15kpa；If it is, wait for detection next time；If it is not, then need to be alarmed and stored DTC.
It can also judge whether vacuum is less than default first vacuum simultaneously, now need first to determine that air-conditioning is closed,
Vehicle gear is kept off in N or P, that is to say, that when air-conditioning is closed, vehicle gear is kept off in N or P, while vacuum is less than
Default first vacuum, just alarmed and store DTC；Otherwise, detection next time is waited.
The present invention provides a kind of the Matching and modification method and its system of vehicle vacuum brake booster vacuum, is helped in vehicle vacuum
When power device vacuum is relatively low, engine idle rotational is loaded or improved to lift the vacuum of vehicle vacuum booster by closing
Degree, so as to increase power output, makes severity of braking higher, increases the security of driving；In order to increase the comfortableness of driving, Ke Yijia
Enter minimum height above sea level as restrictive condition, only when higher than minimum height above sea level, can just be sent out by closing to load or improve
Motivation idling speed lifts the vacuum of vehicle vacuum booster；The problem of in order to take into account fuel economy simultaneously, in vehicle
When vacuum booster vacuum is relatively low, closing load can be first passed through to lift the vacuum of vehicle vacuum booster, if closed
After closing load, vacuum or low, then lift the vacuum of vehicle vacuum booster by improving engine idle rotational.This
Invention more adds controlling alarm flow to further improve the security of driving, when air- distributor pressure vacuum with
When whether the difference of the vacuum of vehicle vacuum booster is in default scope, or when air-conditioning is closed, vehicle is kept off
Position is kept off in N or P, while can all send alarm when vacuum is less than default first vacuum, to remind user.
Above by reference to the preferred embodiments of the present invention have been illustrated, those skilled in the art do not depart from the scope of the present invention
And essence, there can be a variety of flexible programs to realize the present invention.For example, as the shown partially of one embodiment or description
Feature can be used for another embodiment to obtain another embodiment.Preferably feasible embodiment of the invention is these are only, not
Therefore limit to the interest field of the present invention, all equivalence changes made with description of the invention and accompanying drawing content, be both contained in
Within the interest field of the present invention.
Claims (14)
- A kind of 1. Matching and modification method of vehicle vacuum brake booster vacuum, it is characterised in that including step：S1, the vacuum for obtaining vehicle vacuum booster, and judge whether the vacuum is less than default first vacuum；S2, when the vacuum is less than default first vacuum, then enter load control logic or idle speed control logic；Wherein described load control logic includes step:A1, obtain GES and accelerator pedal signal；A2, at speed In in default number range and when gas pedal is not operated, vehicle load is closed；The idle speed control logic includes step：B1, obtain vehicle shift signal；B2, when vehicle gear be not at P gear or N gear During state, engine idle rotational is lifted；Wherein, in the step S2, when the vacuum is less than default first vacuum, it is introduced into the load control Logic, now：If the vehicle load is in opening, the vehicle load is closed, then obtains the true of vehicle vacuum booster Reciprocal of duty cycle, if the vacuum is also less than first vacuum, into idle speed control logic；If the vehicle load is closed, into the idle speed control logic.
- 2. the Matching and modification method of vehicle vacuum brake booster vacuum according to claim 1, it is characterised in that described Also include step in step S1：Air- distributor pressure signal is obtained, and the height above sea level residing for the vehicle is calculated accordingly, When the height above sea level is higher than default minimum height above sea level, into the step S2.
- 3. the Matching and modification method of vehicle vacuum brake booster vacuum according to claim 2, it is characterised in that all Height above sea level is divided into several height above sea level sections, and different vehicle vacuum power-assisteds is set to different height above sea level sections according to braking requirement Device vacuum ranges, wherein the lower limit in the vehicle vacuum brake booster vacuum scope is described in the height above sea level section First vacuum.
- 4. the Matching and modification method of vehicle vacuum brake booster vacuum according to claim 3, it is characterised in that described Also include in step S1：According to the vacuum of the vehicle vacuum booster of acquisition and the height above sea level being calculated Degree, judges whether both match, if mismatching, is recorded.
- 5. the Matching and modification method of vehicle vacuum brake booster vacuum according to claim 2, it is characterised in that described Also include step in step S1：The vacuum of the air- distributor pressure is drawn according to air- distributor pressure signal of change, is judged The difference of the vacuum of the vacuum of the air- distributor pressure and the vehicle vacuum booster whether in default scope, If alarm is not sent in the default scope.
- 6. the Matching and modification method of vehicle vacuum brake booster vacuum according to any one of claims 1 to 5, its feature exist In the load control logic also includes step:A3, vacuum, GES and the throttle for obtaining vehicle vacuum booster Pedal signal；If A4, the vacuum are more than default second vacuum, or speed is in default number range, or institute State gas pedal not to be operated, then exit the load control logic, wherein second vacuum is more than first vacuum Degree；The idle speed control logic also includes step：B3, the vacuum for obtaining vehicle vacuum booster；B4, when the vacuum During less than second vacuum, the engine idle rotational is continued to lift up, until the vacuum is true more than described second Reciprocal of duty cycle.
- 7. the Matching and modification method of vehicle vacuum brake booster vacuum according to any one of claims 1 to 5, its feature exist In also including in the step B2 of the idle speed control logic：It is turned off in the vehicle load, and the vacuum is less than described In the case of first vacuum, if vehicle gear is in P gears or N gears, alarm is sent.
- 8. the Matching and modification method of vehicle vacuum brake booster vacuum according to any one of claims 1 to 5, its feature exist In the vehicle load includes at least one in air-conditioning, rearview mirror electric heating system, rear window electric heating system.
- A kind of 9. Matching and modification system of vehicle vacuum brake booster vacuum, it is characterised in that including：Sensor assembly, for obtaining the vacuum of vehicle vacuum booster, GES, accelerator pedal signal；Electronic control unit, the signal sent for receiving vehicle shift signal and the sensor assembly, and described in judgement Whether vacuum is less than default first vacuum；When the vacuum is less than default first vacuum, vehicle speed is in In default number range, and when the gas pedal is not operated, vehicle load is closed in control；Or when the vacuum is less than Default first vacuum, and vehicle gear be not at P gear or N gear state when, control lifting engine idle rotational；Wherein, electronic control unit obtains the vacuum of vehicle vacuum booster, if institute after the vehicle load is closed in control State vacuum and be also less than first vacuum, then when vehicle gear is not at P gears or N gear states, control lifting is started Machine idling speed.
- 10. the Matching and modification system of vehicle vacuum brake booster vacuum according to claim 9, it is characterised in that also wrap Gearbox control is included, is connected with the electronic control unit, for making the electronic control unit obtain vehicle shift signal； The sensor assembly includes being used for the vacuum sensor for obtaining vehicle vacuum brake booster vacuum, for obtaining GES Vehicle speed sensor, for obtaining the pedal sensor of accelerator pedal signal.
- 11. the Matching and modification system of vehicle vacuum brake booster vacuum according to claim 9, it is characterised in that also wrap Compressor module is included, is connected with the electronic control unit, for being turned off or on according to the control of the electronic control unit Air-conditioning.
- 12. the Matching and modification system of vehicle vacuum brake booster vacuum according to claim 9, it is characterised in that also wrap Electrical heating module is included, is connected with the electronic control unit, for being turned off or on according to the control of the electronic control unit Rearview mirror electric heating system, rear window electric heating system.
- 13. the Matching and modification system of vehicle vacuum brake booster vacuum according to claim 9, it is characterised in that described Electronic control unit also receives air- distributor pressure signal, and：The height above sea level residing for vehicle is calculated accordingly；Vacuum according to the vehicle vacuum booster and calculating simultaneously The height above sea level drawn, judges whether both match, if mismatching, is recorded；OrThe vacuum of the air- distributor pressure is calculated accordingly, judges the vacuum of the air- distributor pressure and the car Whether the difference of the vacuum of vacuum booster is in default scope, if not sending police in the default scope Report.
- 14. the Matching and modification system of vehicle vacuum brake booster vacuum according to claim 9, it is characterised in that described In the case that electronic control unit is also turned off in the vehicle load, and the vacuum is less than first vacuum, when When vehicle gear is in P gears or N gears, alarm is sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310455019.0A CN104442773B (en) | 2013-09-24 | 2013-09-24 | The Matching and modification method and its system of vehicle vacuum brake booster vacuum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310455019.0A CN104442773B (en) | 2013-09-24 | 2013-09-24 | The Matching and modification method and its system of vehicle vacuum brake booster vacuum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104442773A CN104442773A (en) | 2015-03-25 |
| CN104442773B true CN104442773B (en) | 2018-02-23 |
Family
ID=52889755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310455019.0A Active CN104442773B (en) | 2013-09-24 | 2013-09-24 | The Matching and modification method and its system of vehicle vacuum brake booster vacuum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104442773B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404782B (en) * | 2015-11-27 | 2018-04-03 | 郑州比克新能源汽车有限公司 | The computational methods of vacuum during a kind of car brake |
| CN106812609A (en) * | 2017-01-04 | 2017-06-09 | 北京汽车股份有限公司 | vacuum degree control method, device, system and automobile |
| CN108622069B (en) * | 2017-03-23 | 2020-02-14 | 上海汽车集团股份有限公司 | Vehicle control method and ECU |
| CN109318879B (en) * | 2017-07-31 | 2020-06-02 | 宝沃汽车（中国）有限公司 | Controller and control method for vehicle air conditioner compressor and vehicle |
| CN112519738B (en) * | 2019-09-18 | 2022-04-26 | 广州汽车集团股份有限公司 | Vacuum-assisted brake system, brake control method, and brake control apparatus |
| CN110979300B (en) * | 2019-12-25 | 2022-05-03 | 奇瑞汽车股份有限公司 | Method and device for adjusting brake vacuum degree and storage medium |
| CN112277914B (en) * | 2020-09-30 | 2022-02-08 | 北汽福田汽车股份有限公司 | Control method and device of hydraulic power-assisted brake system |
| CN112208537A (en) * | 2020-10-19 | 2021-01-12 | 广西柳工机械股份有限公司 | Vehicle acceleration control method and system and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050099A (en) * | 2010-12-22 | 2011-05-11 | 联合汽车电子有限公司 | Improving method of brake booster effect |
| CN102837693A (en) * | 2012-08-06 | 2012-12-26 | 联合汽车电子有限公司 | Control method for improving brake performance |
| CN103072563A (en) * | 2013-02-06 | 2013-05-01 | 浙江吉利汽车研究院有限公司杭州分公司 | Method for controlling electric vacuum pump based on ECU (Electronic Control Unit) control |
| CN203496882U (en) * | 2013-09-24 | 2014-03-26 | 广州汽车集团股份有限公司 | Vacuum degree matching and adjusting system for vehicle vacuum booster |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000108879A (en) * | 1998-09-30 | 2000-04-18 | Fuji Heavy Ind Ltd | Brake device of automobile |
-
2013
- 2013-09-24 CN CN201310455019.0A patent/CN104442773B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102050099A (en) * | 2010-12-22 | 2011-05-11 | 联合汽车电子有限公司 | Improving method of brake booster effect |
| CN102837693A (en) * | 2012-08-06 | 2012-12-26 | 联合汽车电子有限公司 | Control method for improving brake performance |
| CN103072563A (en) * | 2013-02-06 | 2013-05-01 | 浙江吉利汽车研究院有限公司杭州分公司 | Method for controlling electric vacuum pump based on ECU (Electronic Control Unit) control |
| CN203496882U (en) * | 2013-09-24 | 2014-03-26 | 广州汽车集团股份有限公司 | Vacuum degree matching and adjusting system for vehicle vacuum booster |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104442773A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104442773B (en) | The Matching and modification method and its system of vehicle vacuum brake booster vacuum | |
| US8483935B2 (en) | Method for controlling internal combustion engines in hybrid powertrains | |
| CN1847067B (en) | Sensor feedback control for noise and vibration | |
| US10207711B2 (en) | Vacuum boost for vehicle braking | |
| CN102463975B (en) | For the vacuum servo of car brakeing | |
| US9488168B2 (en) | Method and system for prioritizing vehicle vacuum | |
| CN107630757B (en) | Method and system for operating an engine start-stop system in a vehicle | |
| US20060178797A1 (en) | Coordinated torque control security method and apparatus | |
| US10011213B1 (en) | System for enhanced vehicle performance and efficiency | |
| CN102673565B (en) | For the method and apparatus controlling the starting process of motor vehicles | |
| RU2715637C2 (en) | Method (embodiments) and system for controlling ejection flow through aspirator for vehicle engine | |
| US20100222991A1 (en) | Method for operating an internal combustion engine | |
| US20030230439A1 (en) | System and method to control a switchable powertrain mount | |
| CN203496882U (en) | Vacuum degree matching and adjusting system for vehicle vacuum booster | |
| CN103261637B (en) | Internal combustion engine control apparatus | |
| CN104608762B (en) | A kind of uphill starting auxiliary control method and control device | |
| US8374763B2 (en) | Vehicle fuel control based on vacuum-assisted brake component actuation | |
| EP2808520A1 (en) | Engine restart control device, vehicle, and vehicle control method | |
| CN110962855A (en) | Torque control system and method for extended range automobile engine | |
| US8364373B2 (en) | Method for controlling internal combustion engines in hybrid powertrains | |
| CA2621750C (en) | System and method for reducing throttling losses during regenerative braking | |
| CN109356729B (en) | Exhaust brake butterfly valve control system and control method | |
| CN104417311A (en) | Control method and control system for vehicle air conditioner compressor | |
| CN208982173U (en) | A kind of automobile exhaust gas power hoisting device | |
| US11654880B2 (en) | Adjusting performance of an electric motor in a hybrid vehicle during a combustion event |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |