CN103359099A - Control system and control method for automobile braking vacuum degree - Google Patents

Control system and control method for automobile braking vacuum degree Download PDF

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Publication number
CN103359099A
CN103359099A CN201310182463XA CN201310182463A CN103359099A CN 103359099 A CN103359099 A CN 103359099A CN 201310182463X A CN201310182463X A CN 201310182463XA CN 201310182463 A CN201310182463 A CN 201310182463A CN 103359099 A CN103359099 A CN 103359099A
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CN
China
Prior art keywords
vacuum
degree
control module
intake manifold
engine
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.)
Pending
Application number
CN201310182463XA
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Chinese (zh)
Inventor
任颖睦
金吉刚
杨安志
冯擎峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch
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Publication date
Application filed by Zhejiang Geely Holding Group Co Ltd, Zhejiang Geely Automobile Research Institute Co Ltd, Zhejiang Geely Automobile Research Institute Co Ltd Hangzhou Branch filed Critical Zhejiang Geely Holding Group Co Ltd
Priority to CN201310182463XA priority Critical patent/CN103359099A/en
Publication of CN103359099A publication Critical patent/CN103359099A/en
Pending legal-status Critical Current

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Abstract

The invention provides a control system and a control method for the automobile braking vacuum degree. The control system comprises a braking pedal, an engine, a vacuum booster, a control module, a braking sensor, a loaded electrical appliance and a pressure sensor, wherein the engine comprises an intake manifold and a throttle valve; the intake manifold is connected with the vacuum booster; the braking sensor is connected with the braking pedal, and transmits a braking signal to the control module; the pressure sensor is used for feeding back the vacuum degree of the intake manifold to the control module; and the control module controls switching on and switching off of the loaded electrical appliance and the opening magnitude of the throttle valve according to the braking signal and the vacuum degree of the intake manifold. Compared with the prior art, the control system and the control method for the automobile braking vacuum degree increase the vacuum degree in the intake manifold quickly, improve an effect of the vacuum booster, and increase a braking force through automatic control without the help of external equipment.

Description

The control system of automobile brake degree of vacuum and method
Technical field
The present invention relates to the automobile brake technical field, particularly a kind of control system of automobile brake degree of vacuum and method.
Background technology
Brake system of car plays an important role to the safety of automobile, is one of focus of automotive safety Journal of Sex Research.At present, the major part in the brake system of car has brake pedal, vacuum booster, master brake cylinder, wheel cylinder and drg.The power process vacuum booster amplification that the people produces by stepping on brake pedal, then act on master brake cylinder, this power passes to wheel cylinder through the form by hydraulic energy behind the master brake cylinder, and further amplify, last this part hydraulic energy acts on drg, drg moves to wheel with braking force, makes automobile brake.Wherein, vacuum booster plays very important effect, and existing vehicle often uses the degree of vacuum of engine intake manifold to make side generation degree of vacuum in the vacuum booster, makes its inner pressure reduction that produces, thereby obtains power-assisted.
Yet along with the automobile load is increasing, the negative pressure in the induction maniflod may be not enough under very special operating mode, this just causes promoting the vacuum servo pump work, has caused the brake vacuum degree not enough, and braking force is less, stopping distance is elongated, has increased the driving danger coefficient.
Generally run into the situation of brake vacuum degree deficiency, usually handling is to increase the degree of vacuum storage by installing electronic vacuum pump or vacuum air storage tank additional, reach the purpose that promotes safety, but thing followed problem is, the electric vacuum pump cost is higher, and noise is larger during work, larger to car load traveling comfort and cost impact, vacuum air storage tank then because bulky is difficult to be arranged in the cabin, does not meet the development tendency of present automobile compact design.
Summary of the invention
The invention provides a kind of control system of automobile brake degree of vacuum, by self controlling the degree of vacuum in the induction maniflod that increases sharply, increase the effect of vacuum booster, Hoist braking power.
The present invention also provides a kind of automobile brake vacuum degree control method of using said system.
For reaching above-mentioned advantage, the invention provides a kind of control system of automobile brake degree of vacuum, comprise brake pedal, driving engine, vacuum booster control module, braking sensor, load appliance and pressure sensor; Described driving engine comprises induction maniflod and throttle gate, and described induction maniflod links to each other with described vacuum booster; Described braking sensor is connected with described brake pedal and transmits speed-slackening signal to described control module, and described pressure sensor is used for feeding back the degree of vacuum of described induction maniflod to described control module; Described control module is according to the switch of the described load appliance of vacuum degree control of described speed-slackening signal and described induction maniflod and the size of described throttle opening.
In one embodiment of the invention, described control module is vehicle electronic control unit.
In one embodiment of the invention, described braking sensor is brake switch.
In one embodiment of the invention, described load appliance comprises air-conditioning.
The present invention also provides a kind of control method of automobile brake degree of vacuum, and its step comprises:
(1) judge whether to receive speed-slackening signal by the control module, if so, execution in step (2) then; Otherwise described control module is not made instruction;
Whether the degree of vacuum of (2) judging engine intake manifold by described control module greater than preset value, if so, and execution in step (3) then; Otherwise described control module is not made instruction;
(3) close load appliance by described control module;
(4) judge whether to need further to regulate the aperture of engine air throttle by described control module, if so, execution in step (5) then; If not, judge whether to meet the condition of recovering described load appliance work by described control module, if so, then recover load appliance work, otherwise continue execution in step (3);
(5) reduce the aperture of engine air throttle by described control module;
(6) judge whether to meet the condition of recovering described load appliance and described engine operation by described control module, if so, then recover described load appliance and engine operation; Otherwise, continue to carry out described step (5).
In one embodiment of the invention, " judging whether to need further to regulate the aperture of engine air throttle " in the described step (4) is that the degree of vacuum that judges whether described engine intake manifold continues the first Preset Time less than preset value.
In one embodiment of the invention, in the described step (4), the condition of recovering load appliance work is that the degree of vacuum of described engine intake manifold continues the second Preset Time greater than described preset value or speed-slackening signal disappearance.
In one embodiment of the invention, the condition of recovering described load appliance and described engine operation in the described step (6) is that the degree of vacuum of described engine intake manifold continues the first Preset Time less than described preset value.
In one embodiment of the invention, the preset value of the degree of vacuum of described engine intake manifold is 30kpa.
In one embodiment of the invention, described the first Preset Time is 3 seconds, and described the second Preset Time is 10 seconds.
The control system of automobile brake degree of vacuum of the present invention and method, braking sensor are connected with brake pedal and transmit speed-slackening signal to controlling module, and pressure sensor is used for the degree of vacuum of feedback induction maniflod to controlling module; The control module is according to the switch of the vacuum degree control load appliance of speed-slackening signal and induction maniflod and the size of throttle opening.Application controls module of the present invention is to the advantage of engine intake manifold vacuum degree control, judge and measure of control by a series of logics, accurately judge brake vacuum degree real-time change situation, when vacuum degree deficiency occurs, not by external device, by self controlling the degree of vacuum in the induction maniflod that increases sharply, increase the effect of vacuum booster, Hoist braking power increases safety performance.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the structural representation of control system of the automobile brake degree of vacuum of preferred embodiment of the present invention.
Fig. 2 is the diagram of circuit of the automobile brake vacuum degree control method of preferred embodiment of the present invention.
The specific embodiment
Please refer to Fig. 1, the control system of automobile brake degree of vacuum of the present invention comprises brake pedal, braking inductor, control module, driving engine, pressure sensor, load appliance and vacuum booster.
The braking inductor is connected with brake pedal, is used for speed-slackening signal is passed to the control module.
Driving engine has induction maniflod and throttle gate, and pressure sensor is used for the degree of vacuum of induction induction maniflod and information is passed to the control module.The degree of vacuum of engine intake manifold makes side generation degree of vacuum in the vacuum booster, thereby makes the inner pressure reduction that produces of vacuum booster, obtains power-assisted.The control of the controlled module of aperture of throttle gate.
Load appliance is for affecting the electrical equipment of engine intake manifold degree of vacuum, and such as air-conditioning, car head light, its switch is by the control of control module.
The control module is according to degree of vacuum and the switch of brake condition control load electrical equipment and the suction quantity of driving engine of induction maniflod.The control module is by being installed in the air inlet pressure sensor Real Time Monitoring intake manifold vacuum on the engine intake manifold, by braking inductor Real Time Monitoring braking situation.When the control module finds that intake manifold vacuum is lower than preset value and (usually is set as 30Kpa, different automobile types is slightly different), and receive the speed-slackening signal that is transmitted by the braking inductor, i.e. expression chaufeur this moment is stepped on brake pedal, begin vehicle is braked, the control module is then judged car brakeing this moment vacuum degree deficiency.
The control module is after judging vacuum degree deficiency, the unlatching of at first cutting off load appliance (such as air-conditioning or stop headlight) compensates, reduce air input of engine by air by reducing extraneous load, increase degree of vacuum, Hoist braking power, continuous a period of time (such as ten seconds) degree of vacuum then reopens air-conditioning even load electrical equipment greater than preset value after the control module monitors the speed-slackening signal cancellation, perhaps cuts off load.
After cutting off air-conditioning even load electrical equipment, as control module and monitor (such as three seconds) degree of vacuum of continuous a period of time less than preset value, then control electronic air throttle body and reduce aperture, promote degree of vacuum, detect simultaneously generator operating conditions, guarantee that driving engine can not stop working, until speed-slackening signal disappearance or degree of vacuum are greater than preset value.
Preferably, the control module is vehicle electronic control unit (ECU, Electronic Control Unit).
Please refer to Fig. 2, a kind of automobile brake vacuum degree control method of using said system, step comprises:
(1) judge whether to receive speed-slackening signal by the control module, if so, execution in step (2) then; Otherwise the control module is not made instruction;
Whether the degree of vacuum of (2) judging engine intake manifold by the control module greater than preset value, if so, and execution in step (3) then; Otherwise the control module is not made instruction;
(3) close load appliance by the control module;
(4) judge whether to need further to regulate the aperture of engine air throttle by the control module, if so, execution in step (5) then; If not, judge whether to meet the condition of recovering load appliance work by the control module, if so, then recover load appliance work, otherwise continue execution in step (3);
(5) by controlling the aperture of module minimizing engine air throttle;
(6) judge whether to meet the condition of recovering load appliance and engine operation by the control module, if so, then recover load appliance and engine operation; Otherwise, continue execution in step (5).
In above-mentioned steps (4), " judging whether to need further to regulate the aperture of engine air throttle " is that the degree of vacuum that judges whether engine intake manifold continues the first Preset Time less than preset value; The condition of recovering load appliance work is that the degree of vacuum of engine intake manifold continues the second Preset Time greater than preset value or speed-slackening signal disappearance.
The degree of vacuum of " recovering the condition of load appliance and engine operation " and be engine intake manifold in above-mentioned steps (6) continues the first Preset Time less than preset value.
Preferably, the preset value of the degree of vacuum of engine intake manifold is 30kpa.
Preferably, the second Preset Time is 10 seconds.
Preferably, the first Preset Time is 3 seconds.
Application controls module of the present invention is to the advantage of engine intake manifold vacuum degree control, judge and measure of control by a series of logics, accurately judge brake vacuum degree real-time change situation, when vacuum degree deficiency occurs, not by external device, by self controlling the degree of vacuum in the induction maniflod that increases sharply, increase the effect of vacuum booster, Hoist braking power increases safety performance.
More than, only be embodiments of the invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solution of the present invention content, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.

Claims (10)

1. the control system of an automobile brake degree of vacuum, comprise brake pedal, driving engine and vacuum booster, described driving engine comprises induction maniflod and throttle gate, described induction maniflod links to each other with described vacuum booster, it is characterized in that: described control system also comprises control module, braking sensor, load appliance and pressure sensor; Described braking sensor is connected with described brake pedal and transmits speed-slackening signal to described control module, and described pressure sensor is used for feeding back the degree of vacuum of described induction maniflod to described control module; Described control module is according to the switch of the described load appliance of vacuum degree control of described speed-slackening signal and described induction maniflod and the size of described throttle opening.
2. the control system of automobile brake degree of vacuum as claimed in claim 1, it is characterized in that: described control module is vehicle electronic control unit.
3. the control system of automobile brake degree of vacuum as claimed in claim 1, it is characterized in that: described braking sensor is brake switch.
4. the control system of automobile brake degree of vacuum as claimed in claim 1, it is characterized in that: described load appliance comprises air-conditioning.
5. the control method of an automobile brake degree of vacuum, its step comprises:
(1) judge whether to receive speed-slackening signal by the control module, if so, execution in step (2) then; Otherwise described control module is not made instruction;
Whether the degree of vacuum of (2) judging engine intake manifold by described control module greater than preset value, if so, and execution in step (3) then; Otherwise described control module is not made instruction;
(3) close load appliance by described control module;
(4) judge whether to need further to regulate the aperture of engine air throttle by described control module, if so, execution in step (5) then; If not, judge whether to meet the condition of recovering described load appliance work by described control module, if so, then recover load appliance work, otherwise continue execution in step (3);
(5) reduce the aperture of engine air throttle by described control module;
(6) judge whether to meet the condition of recovering described load appliance and described engine operation by described control module, if so, then recover described load appliance and engine operation; Otherwise, continue to carry out described step (5).
6. the control method of automobile brake degree of vacuum as claimed in claim 5 is characterized in that: " judge whether needs further regulate the aperture of engine air throttle " is that the degree of vacuum that judges whether described engine intake manifold continues the first Preset Time less than preset value in the described step (4).
7. the control method of automobile brake degree of vacuum as claimed in claim 6, it is characterized in that: in the described step (4), the condition of recovering load appliance work is that the degree of vacuum of described engine intake manifold continues the second Preset Time greater than described preset value or speed-slackening signal disappearance.
8. the control method of automobile brake degree of vacuum as claimed in claim 5 is characterized in that: the condition of recovering described load appliance and described engine operation in the described step (6) is that the degree of vacuum of described engine intake manifold continues the first Preset Time less than described preset value.
9. the control method of automobile brake degree of vacuum as claimed in claim 5, it is characterized in that: the preset value of the degree of vacuum of described engine intake manifold is 30kpa.
10. the control method of automobile brake degree of vacuum as claimed in claim 5, it is characterized in that: described the first Preset Time is 3 seconds, described the second Preset Time is 10 seconds.
CN201310182463XA 2013-05-15 2013-05-15 Control system and control method for automobile braking vacuum degree Pending CN103359099A (en)

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CN201310182463XA CN103359099A (en) 2013-05-15 2013-05-15 Control system and control method for automobile braking vacuum degree

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Application Number Priority Date Filing Date Title
CN201310182463XA CN103359099A (en) 2013-05-15 2013-05-15 Control system and control method for automobile braking vacuum degree

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105966384A (en) * 2016-05-25 2016-09-28 北京新能源汽车股份有限公司 Automobile and emergency braking control method and system thereof
CN106740781A (en) * 2017-01-18 2017-05-31 安徽江淮汽车集团股份有限公司 A kind of control system and method for vacuum automobile power-assisted
CN107228770A (en) * 2017-05-27 2017-10-03 重庆长安汽车股份有限公司 The very hot regional special test method of whole-vehicle air-conditioner cut-out
CN110748424A (en) * 2018-07-24 2020-02-04 现代自动车株式会社 Control system and method for vehicle compressor during cold start

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6398316B1 (en) * 1998-04-15 2002-06-04 Toyota Jidosha Kabushiki Kaisha Vacuum booster apparatus and a brake apparatus
US20040182363A1 (en) * 2003-03-19 2004-09-23 Kimiyasu Suzuki Vacuum generator in combustion engine
CN1968842A (en) * 2004-06-17 2007-05-23 大陆-特韦斯贸易合伙股份公司及两合公司 Method for providing a negative pressure in a vacuum chamber of a pneumatic brake booster
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6398316B1 (en) * 1998-04-15 2002-06-04 Toyota Jidosha Kabushiki Kaisha Vacuum booster apparatus and a brake apparatus
US20040182363A1 (en) * 2003-03-19 2004-09-23 Kimiyasu Suzuki Vacuum generator in combustion engine
CN1968842A (en) * 2004-06-17 2007-05-23 大陆-特韦斯贸易合伙股份公司及两合公司 Method for providing a negative pressure in a vacuum chamber of a pneumatic brake booster
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105966384A (en) * 2016-05-25 2016-09-28 北京新能源汽车股份有限公司 Automobile and emergency braking control method and system thereof
CN105966384B (en) * 2016-05-25 2019-12-17 北京新能源汽车股份有限公司 Automobile and emergency braking control method and system thereof
CN106740781A (en) * 2017-01-18 2017-05-31 安徽江淮汽车集团股份有限公司 A kind of control system and method for vacuum automobile power-assisted
CN107228770A (en) * 2017-05-27 2017-10-03 重庆长安汽车股份有限公司 The very hot regional special test method of whole-vehicle air-conditioner cut-out
CN110748424A (en) * 2018-07-24 2020-02-04 现代自动车株式会社 Control system and method for vehicle compressor during cold start

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Application publication date: 20131023