CN101767580A - Brake vacuum assist system and brake vacuum assist method of hybrid power automobile - Google Patents
Brake vacuum assist system and brake vacuum assist method of hybrid power automobile Download PDFInfo
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- CN101767580A CN101767580A CN200810188193A CN200810188193A CN101767580A CN 101767580 A CN101767580 A CN 101767580A CN 200810188193 A CN200810188193 A CN 200810188193A CN 200810188193 A CN200810188193 A CN 200810188193A CN 101767580 A CN101767580 A CN 101767580A
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Abstract
The invention provides a brake vacuum assist system, which comprises a main controller (12), a control loop, a vacuum pump (6) and a vacuum tank (7), wherein the main controller (12) is used for controlling the vacuum pump (6) through the control loop; an air intake manifold of an engine (21) is communicated with the vacuum tank (7); the main controller (12) is also used for determining whether the control loop is in an abnormal state or not; and starting the engine (21) when determining the control loop to be in the abnormal state. The invention provides a brake vacuum assist method, which comprises the following steps: the main controller (12) controls the vacuum pump (6) communicated with the vacuum tank (7) through the control loop; the air intake manifold of the engine (21) is communicated with the vacuum tank (7); the main controller (12) determines whether the control loop is in the abnormal state or not; and the engine (21) is started when the control loop is determined to be in the abnormal state. The brake vacuum assist system and the brake vacuum assist method can ensure the effectiveness of brake assistance of a hybrid power automobile.
Description
Technical field
The present invention relates to the force aid system that brakes, particularly a kind of brake vacuum assist system and brake vacuum assist method that is used for hybrid vehicle.
Background technology
Because people are to the pay attention to day by day of environmental protection and the effective and reasonable utilization of the energy; oily electric mixed hybrid vehicle with efficient, energy-saving and environmental protection vehicle has become the development tendency of auto trade because of the advantage of the high-energy-density of anti-emission carburetor with battery-driven car and traditional combustion engine automobile.
Existing hybrid vehicle all is furnished with the brake power-assisted basically, especially adopts the use of brake control system of vacuum booster unit very universal.The brake vacuum assist system of existing hybrid vehicle is mainly vacuumized by control loop control vacuum pump by controller, and then control vacuum booster generation power-assisted, realizes the power-assisted of braking with this.Yet, under abnormal condition, situation about losing efficacy, but can't control the brake power-assisted as control loop, can't realize the reliability and the validity of hybrid vehicle brake vacuum assist system thus fully, the people's that can't guarantee to greatest extent to drive a vehicle safety.
Summary of the invention
The purpose of this invention is to provide a kind of can the assurance and under abnormal condition, situation about losing efficacy, still can control the brake power-assisted effectively, guarantee the brake vacuum assist system that is used for hybrid vehicle and the brake vacuum assist method of driving people's safety to greatest extent as control loop.
The brake vacuum assist system that is used for hybrid vehicle provided by the invention comprises master controller, control loop, vacuum pump and vacuum reservoir, described master controller is electrically connected with vacuum pump by control loop, described master controller is used for by control loop control vacuum pump, the induction maniflod of described vacuum pump is communicated with vacuum reservoir, this system also comprises driving engine, described master controller is electrically connected with driving engine, the induction maniflod of driving engine is communicated with vacuum reservoir, described master controller is used for also determining whether described control loop is in error state, start the engine when definite described control loop is in error state.
The brake vacuum assist method that is used for hybrid vehicle provided by the invention comprises the vacuum pump that master controller is communicated with vacuum reservoir by control loop control, the induction maniflod of the driving engine of described hybrid vehicle is communicated with vacuum reservoir, this method comprises also master controller determines whether described control loop is in error state, start the engine when definite described control loop is in error state.
Brake vacuum assist system that is used for hybrid vehicle provided by the invention and brake vacuum assist method occur unusual and cause can starting the driving engine that is communicated with vacuum reservoir under the situation to the control fails of vacuum pump at the control loop of hybrid vehicle, the degree of vacuum that produces by engine operation makes vacuum booster produce power-assisted in braking procedure, can satisfy the requirement of brake boost, guarantee the hybrid vehicle power-assisted validity of braking.
Description of drawings
Fig. 1 is the constructional drawing that is used for the brake vacuum assist system of hybrid vehicle provided by the invention;
Fig. 2 is the diagram of circuit according to the brake vacuum assist method that is used for hybrid vehicle of preferred implementation of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing brake vacuum assist system and the brake vacuum assist method that is used for hybrid vehicle provided by the invention is described in further detail.
The brake vacuum assist system that is used for hybrid vehicle provided by the invention comprises master controller 12, control loop, vacuum pump 6 and vacuum reservoir 7, described master controller 12 is communicated with vacuum pump 6 by control loop, be used for by control loop control vacuum pump 6, the induction maniflod of described vacuum pump 6 is communicated with vacuum reservoir 7, this system also comprises driving engine 21, described master controller 12 is electrically connected with driving engine 21, the induction maniflod of driving engine 21 is communicated with vacuum reservoir 7, described master controller 12 is used for also determining whether described control loop is in error state, start the engine 21 when definite described control loop is in error state.
As shown in Figure 1, the servo vacuum air chamber back cavity of vacuum booster 3 forms connecting rod mechanism via control cock and brake pedal, be used to brake pedal that power-assisted is provided, the servo vacuum air chamber ante-chamber of vacuum booster 3 is communicated to vacuum reservoir 7 via vacuum line, and vacuum reservoir 7 is communicated to vacuum pump 6 via vacuum line.Vacuum reservoir 7 is provided with vacuum pressure sensor 10, master controller 12 also is electrically connected with vacuum pressure sensor 10, be used for detecting the size of vacuum reservoir 7 atmospheric pressure values by vacuum pressure sensor 10, and then 6 opening and closing of control vacuum pump, controlling vacuum booster with this is that brake pedal provides power-assisted.Detect the size of atmospheric pressure value in the vacuum reservoir 7 by vacuum pressure sensor 10, and then control the switching of vacuum pump 6, it is conventionally known to one of skill in the art providing the power-assisted process of brake with the control vacuum booster.
Described driving engine 21 for example can be engine petrol, diesel motor or other engine fuels for being the engine installation of mechanical energy with thermal power transfer arbitrarily.Driving engine 21 is not worked when hybrid vehicle is in pure electronic mode of operation, and participates in driving work when hybrid vehicle is in the hybrid power mode of operation, for conventionally known to one of skill in the art.
Described master controller 12 for example can be PLC or micro controller system for controlling the controller of vacuum pump 6 opening and closing arbitrarily according to the electric signal of the expression atmospheric pressure value size that receives.Under the preferable case, described main ECU 12 is for adopting the micro controller system LPC2194 that can encrypt the ARM chip.
When hybrid vehicle need brake and after stepping on brake pedal, 10 pairs of vacuum reservoirs of vacuum pressure sensor, 7 internal gas pressure value sizes detect, and will represent that the electric signal of atmospheric pressure value size sends to master controller 12.The pneumatics force gauge 10 of taking seriously detects vacuum reservoir 7 internal gas pressure values can not satisfy the car brakeing power-assisted and require the time, master controller 12 is opened by control loop control vacuum pump 6, different air pressure is born at servo vacuum air chamber diaphragm two ends in the vacuum booster 3 thus, make the very big pressure of master brake cylinder output, reach the purpose of actuating; The pneumatics force gauge 10 of taking seriously detects vacuum reservoir 7 internal gas pressure values when satisfying the car brakeing power-assisted and requiring, and master controller 12 cuts out by main control loop control vacuum pump 6, brake is not activated.
In order when control loop is in error state, still to realize the power-assisted of braking, in the brake vacuum assist provided by the invention system, the induction maniflod of driving engine 21 is communicated with vacuum reservoir 7, master controller 12 is used for also determining whether control loop is in error state, start the engine 21 when definite control loop is in error state.Because the induction maniflod of driving engine 21 is communicated with vacuum reservoir 7, work and regulate atmospheric pressure value in the vacuum reservoir 7 by driving engine 21 in the degree of vacuum of its induction maniflod generation, controlling the vacuum booster 3 that is communicated with vacuum reservoir 7 with this is that brake pedal provides power-assisted.
Described controller 12 receives and detects control loop back production signal that receives and the control signal state of exporting by control loop from the control loop back production signal of control loop and when in brake when inconsistent, determines that control loop is in error state.
Described control loop adopts closed loop control, and master controller 12 can judge whether control loop is normal according to the control signal of control loop output and the logical relation from the back production signal of control loop.The control signal of control loop output and the logical relation of back production signal can preestablish, and be stored in advance in the master controller 12, when master controller 12 when detect the control loop back production signal that receives with by the control signal state of control loop output when inconsistent, determine that master controller 12 is in the control loop error state, export Engine Start Signal thus, start the engine work, controlling vacuum booster with this is that brake pedal provides power-assisted.
Described control loop comprises main control loop and from control loop, described master controller 12 is electrically connected with vacuum pump 6 by main control loop with from control loop respectively;
When described master controller 12 determines whether described control loop is in error state, earlier judge whether main control loop is in error state, when judging that main control loop is in error state, pass through from control loop control vacuum pump 6, judge from control loop whether be in error state then, when judging that being in error state from control loop determines that just described control loop is in error state.
In order to remind steerman when control loop is in error state, under the preferable case, in the brake vacuum assist provided by the invention system, master controller 12 also is used for output alarm signal when definite described control loop is in error state.Can report to the police when receiving described alerting signal, remind the steerman control loop to be in error state with master controller 12 bonded assembly auto alarm devices.
Under the preferable case, described system also comprises vacuum pressure sensor 10, this vacuum pressure sensor 10 is arranged on the described vacuum reservoir 7, described master controller 12 also is electrically connected with vacuum pressure sensor 10, described master controller 12 is used for also determining whether described vacuum pressure sensor 10 is in faulty condition, and control vacuum pump 6 is opened when definite described vacuum pressure sensor 10 is in faulty condition.
Under the preferable case, described system also comprises electric machine controller 15, this electric machine controller 15 is electrically connected with master controller 12, described master controller 12 is used for also determining whether driving engine 21 is in the control abnormity state, output driving engine force start signal is to electric machine controller 15 when definite driving engine 21 is in the control abnormity state, and described electric machine controller 7 also is used for forcing to drag driving engine 21 according to the driving engine force start signal control motor 15 that receives and starts.
Described motor 9 links to each other with driving engine 21, for utilizing three plase alternating current to drive arbitrarily, AC energy being converted to mechanical energy output to drag the device of engine running, for example can be asynchronous AC motor.
The motor control assembly of described electric machine controller 15 for being used for the start and stop and the rotating speed of motor 9 are controlled, electric machine controller 15 forces to drag driving engine 21 work by the driving engine force start signal control motor 9 that receives, and the process that drags driving engine 21 runnings by motor 9 pressures is conventionally known to one of skill in the art.
When the driving engine 21 of hybrid vehicle starts, engine controller 2 can send the signal of expression engine starting to master controller 12, when master controller 12 is not received signal from the expression engine starting of engine controller 2 after start the engine 21 or under the hybrid power mode of operation, determine that driving engine 21 is in the control abnormity state, export driving engine force start signal thus to electric machine controller 7, electric machine controller 7 forces to drag driving engine 21 runnings according to the driving engine force start signal control motor 7 that receives, and realizes the brake power-assisted thus.
Under the preferable case, in order under master controller 12 deadlock states, to realize the brake power-assisted, described system also comprises engine controller 2, this engine controller 2 is electrically connected in series between master controller 12 and the driving engine 21, the electric signal that master controller 12 also is used for sending the expression normal operation by the fixed cycle is to engine controller 2, start the engine 21 when described engine controller 2 is used for not receiving at the fixed time section the electric signal of expression normal operation of autonomous controller 12.
Described engine controller 2 and master controller 12 are connected by status port, and engine controller 2 is also to 12 supervisory function bits of master controller, can judge whether master controller 12 crashes according to the message situation that receives to master controller 12 port mutual with it.Master controller 12 sends the electric signal of expression normal operation to engine controller 2 by the fixed cycle, when engine controller 2 does not receive the electric signal of expression normal operation of autonomous controller 12 in the section at the fixed time, determine that master controller 12 is in the deadlock state, start the engine 21 is realized the brake power-assisted thus simultaneously.
The scope of described fixed cycle is 0.05 to 0.15 second, and the scope of described predetermined amount of time is 100 to 200 fixed cycles.Under the preferable case, the described fixed cycle is 0.1 second, and described predetermined amount of time is 100 fixed cycles.
Below the brake vacuum assist method that is used for hybrid vehicle provided by the invention is described.
The brake vacuum assist method that is used for hybrid vehicle provided by the invention comprises the vacuum pump 6 that master controller 12 is communicated with vacuum reservoir 7 by control loop control, the induction maniflod of the driving engine 21 of described hybrid vehicle is communicated with vacuum reservoir 7, this method comprises also whether master controller 12 definite described control loops are in error state, start the engine 21 when definite described control loop is in error state.
Described control loop comprises main control loop and from control loop, when master controller 12 determines whether described control loop is in error state in the described method, earlier judge whether main control loop is in error state, when judging that main control loop is in error state, pass through from control loop control vacuum pump 6, judge from control loop whether be in error state then, when judging that being in error state from control loop determines that just described control loop is in error state.
Under the preferable case, for notice steerman when control loop is in error state, described method comprises that also master controller 12 reports to the police when definite described control loop is in error state.
Under the preferable case, this method comprises that also master controller 12 detects vacuum pressure sensor 10 and whether is in faulty condition, and control vacuum pump 6 is opened when definite vacuum pressure sensor 10 is in faulty condition.
Under the preferable case, this method comprises also master controller 12 determines whether driving engine 21 is in the control abnormity state, and control motor 9 forces to drag driving engine 21 startups when definite driving engine 21 is in the control abnormity state.
Under the preferable case, this method also comprises electric signal that master controller 12 sends the expression normal operation by the fixed cycle to engine controller 2, start the engine 21 when described engine controller 2 does not receive the electric signal of expression normal operation of autonomous controller 12 at the fixed time section.
The scope of described fixed cycle is 0.05 to 0.15 second, and the scope of described predetermined amount of time is 100 to 200 fixed cycles.Under the preferable case, the described fixed cycle is 0.1 second, and described predetermined amount of time is 100 fixed cycles.
Fig. 2 is the diagram of circuit according to the brake vacuum assist method that is used for hybrid vehicle of preferred implementation of the present invention.
As shown in Figure 2, the vacuum pump 6 that master controller 12 is communicated with vacuum reservoir 7 by control loop control, master controller 12 judges whether main control loop is in error state earlier, when judging that main control loop is in error state, pass through from control loop control vacuum pump 6, and judge whether be in error state from control loop, determine just that when judging when control loop is in error state described control loop is in error state; Start the engine when master controller 12 determines that control loop is in error state, and report to the police.
After driving engine 21 started, master controller 12 determined also whether driving engine 21 is in the control abnormity state, forces to drag driving engine 21 by motor 9 when definite driving engine 21 is in the control abnormity state.
Claims (14)
1. brake vacuum assist system that is used for hybrid vehicle, this system comprises master controller (12), control loop, vacuum pump (6) and vacuum reservoir (7), described master controller (12) is electrically connected with vacuum pump (6) by control loop, described master controller (12) is used for by control loop control vacuum pump (6), the induction maniflod of described vacuum pump (6) is communicated with vacuum reservoir (7), wherein, this system also comprises driving engine (21), described master controller (12) is electrically connected with driving engine (21), the induction maniflod of driving engine (21) is communicated with vacuum reservoir (7), described master controller (12) is used for also determining whether described control loop is in error state, start the engine (21) when definite described control loop is in error state.
2. system according to claim 1, wherein, described master controller (12) also is used for output alarm signal when definite described control loop is in error state.
3. system according to claim 1, wherein, described control loop comprises main control loop and from control loop, described master controller (12) is electrically connected with vacuum pump (6) by main control loop with from control loop respectively;
When described master controller (12) determines whether described control loop is in error state, earlier judge whether main control loop is in error state, when judging that main control loop is in error state, pass through from control loop control vacuum pump (6), judge from control loop whether be in error state then, when judging that being in error state from control loop determines that just described control loop is in error state.
4. according to the described system of each claim among the claim 1-3, wherein, described system also comprises vacuum pressure sensor (10), this vacuum pressure sensor (10) is arranged on the described vacuum reservoir (7), described master controller (12) also is electrically connected with vacuum pressure sensor (10), described master controller (12) is used for also determining whether described vacuum pressure sensor (10) is in faulty condition, controls vacuum pump (6) when being in faulty condition when definite described vacuum pressure sensor (10) and opens.
5. according to the described system of each claim among the claim 1-3, wherein, described system also comprises electric machine controller (15), this electric machine controller (15) is electrically connected with master controller (12), described master controller (12) is used for also determining whether driving engine (21) is in the control abnormity state, output driving engine force start signal is to electric machine controller (15) when definite driving engine (21) is in the control abnormity state, and described electric machine controller (15) also is used for forcing to drag driving engine (21) according to the driving engine force start signal control motor (9) that receives and starts.
6. according to the described system of each claim among the claim 1-3, wherein, described system also comprises engine controller (2), this engine controller (2) is electrically connected in series between master controller (12) and the driving engine (21), the electric signal that described master controller (12) also is used for sending the expression normal operation by the fixed cycle is to engine controller (2), start the engine (21) when described engine controller (2) is used for not receiving at the fixed time section the electric signal of expression normal operation of autonomous controller (12).
7. system according to claim 6, wherein, the scope of described fixed cycle is 0.05 to 0.15 second, the scope of described predetermined amount of time is 100 to 200 fixed cycles.
8. brake vacuum assist method that is used for hybrid vehicle, this method comprises the vacuum pump (6) that master controller (12) is communicated with vacuum reservoir (7) by control loop control, wherein, the induction maniflod of the driving engine of described hybrid vehicle (21) is communicated with vacuum reservoir (7), this method comprises also master controller (12) determines whether described control loop is in error state, start the engine (21) when definite described control loop is in error state.
9. method according to claim 8, wherein, this method comprises that also master controller (12) reports to the police when definite described control loop is in error state.
10. method according to claim 8, wherein, described control loop comprises main control loop and from control loop, when master controller in the described method (12) determines whether described control loop is in error state, earlier judge whether main control loop is in error state, when judging that main control loop is in error state, pass through from control loop control vacuum pump (6), judge from control loop whether be in error state then, when judging that being in error state from control loop determines that just described control loop is in error state.
11. the described method of each claim according to Claim 8-10, wherein, this method comprises that also master controller (12) determines also whether vacuum pressure sensor (10) is in faulty condition, controls vacuum pump (6) when definite vacuum pressure sensor (10) and opens when being in faulty condition.
12. the described method of each claim according to Claim 8-10, wherein, this method comprises also master controller (12) determines also whether driving engine (21) is in the control abnormity state, and control motor (9) forces to drag driving engine (21) startup when definite driving engine (21) is in the control abnormity state.
13. the described method of each claim according to Claim 8-10, wherein, this method also comprises electric signal that master controller (12) also sends the expression normal operation by the fixed cycle to engine controller (2), start the engine (21) when described engine controller (2) does not receive the electric signal of expression normal operation of autonomous controller (12) at the fixed time section.
14. method according to claim 13, wherein, the scope of described fixed cycle is 0.05 to 0.15 second, and the scope of described predetermined amount of time is 100 to 200 fixed cycles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810188193 CN101767580B (en) | 2008-12-30 | 2008-12-30 | Brake vacuum assist system and brake vacuum assist method of hybrid power automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810188193 CN101767580B (en) | 2008-12-30 | 2008-12-30 | Brake vacuum assist system and brake vacuum assist method of hybrid power automobile |
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| CN101767580A true CN101767580A (en) | 2010-07-07 |
| CN101767580B CN101767580B (en) | 2012-12-19 |
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| CN 200810188193 Active CN101767580B (en) | 2008-12-30 | 2008-12-30 | Brake vacuum assist system and brake vacuum assist method of hybrid power automobile |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015715A (en) * | 2014-06-24 | 2014-09-03 | 重庆长安汽车股份有限公司 | Automobile and braking vacuum system thereof |
| CN105083250A (en) * | 2014-04-22 | 2015-11-25 | 博世汽车部件(苏州)有限公司 | Control system for vacuum brake power-assisted system |
| CN105946835A (en) * | 2016-06-27 | 2016-09-21 | 成都雅骏新能源汽车科技股份有限公司 | Electric vacuum pump controller and control method applicable to pure electric vehicle |
| CN108099885A (en) * | 2017-12-13 | 2018-06-01 | 中国第汽车股份有限公司 | A kind of vacuum degree control method and system suitable for hybrid power braking |
| CN109484388A (en) * | 2018-12-20 | 2019-03-19 | 安徽江淮汽车集团股份有限公司 | A kind of brake of electric vehicle power assisting device diagnostic method |
| CN110723131A (en) * | 2018-06-28 | 2020-01-24 | 长城汽车股份有限公司 | Vacuum pump control method, device and system for hybrid electric vehicle and storage medium |
| CN110824224A (en) * | 2019-08-01 | 2020-02-21 | 中国第一汽车股份有限公司 | Detection device and detection method for electric power-assisted system of electric automobile |
| CN115214581A (en) * | 2022-05-18 | 2022-10-21 | 广州汽车集团股份有限公司 | Control method and device, vehicle and storage medium |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2759872Y (en) * | 2004-12-13 | 2006-02-22 | 万向钱潮股份有限公司 | Vacuum power-assisted brake apparatus of electric automobile |
| CN2880613Y (en) * | 2005-12-28 | 2007-03-21 | 比亚迪股份有限公司 | Brake vacuum booster for electric automobile |
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2008
- 2008-12-30 CN CN 200810188193 patent/CN101767580B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105083250A (en) * | 2014-04-22 | 2015-11-25 | 博世汽车部件(苏州)有限公司 | Control system for vacuum brake power-assisted system |
| CN105083250B (en) * | 2014-04-22 | 2018-05-04 | 博世汽车部件(苏州)有限公司 | Control system for vacuum braking force aid system |
| CN104015715A (en) * | 2014-06-24 | 2014-09-03 | 重庆长安汽车股份有限公司 | Automobile and braking vacuum system thereof |
| CN105946835A (en) * | 2016-06-27 | 2016-09-21 | 成都雅骏新能源汽车科技股份有限公司 | Electric vacuum pump controller and control method applicable to pure electric vehicle |
| CN108099885A (en) * | 2017-12-13 | 2018-06-01 | 中国第汽车股份有限公司 | A kind of vacuum degree control method and system suitable for hybrid power braking |
| CN108099885B (en) * | 2017-12-13 | 2024-04-16 | 中国第一汽车股份有限公司 | Vacuum degree control method and system suitable for hybrid power braking |
| CN110723131A (en) * | 2018-06-28 | 2020-01-24 | 长城汽车股份有限公司 | Vacuum pump control method, device and system for hybrid electric vehicle and storage medium |
| CN110723131B (en) * | 2018-06-28 | 2020-10-16 | 长城汽车股份有限公司 | Vacuum pump control method, device and system for hybrid electric vehicle and storage medium |
| CN109484388A (en) * | 2018-12-20 | 2019-03-19 | 安徽江淮汽车集团股份有限公司 | A kind of brake of electric vehicle power assisting device diagnostic method |
| CN110824224A (en) * | 2019-08-01 | 2020-02-21 | 中国第一汽车股份有限公司 | Detection device and detection method for electric power-assisted system of electric automobile |
| CN110824224B (en) * | 2019-08-01 | 2021-12-07 | 中国第一汽车股份有限公司 | Detection device and detection method for electric power-assisted system of electric automobile |
| CN115214581A (en) * | 2022-05-18 | 2022-10-21 | 广州汽车集团股份有限公司 | Control method and device, vehicle and storage medium |
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| CN101767580B (en) | 2012-12-19 |
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