CN107901898B - Pneumatic booster assembly based on feedback disc structure - Google Patents
Pneumatic booster assembly based on feedback disc structure Download PDFInfo
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- CN107901898B CN107901898B CN201711082360.0A CN201711082360A CN107901898B CN 107901898 B CN107901898 B CN 107901898B CN 201711082360 A CN201711082360 A CN 201711082360A CN 107901898 B CN107901898 B CN 107901898B
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- 238000007789 sealing Methods 0.000 claims description 43
- 230000007246 mechanism Effects 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004202 carbamide Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Abstract
The invention relates to a pneumatic booster assembly based on a feedback disc structure, which uses high-pressure air as a booster source to improve the braking capacity of a hydraulic braking system. During braking, high-pressure air enters the booster cavity A of the air pressure booster assembly through the high-pressure air inlet and the air inlet channel to realize booster, the feedback disc structure enables good follow-up performance and operation feel during braking, and when the maximum servo force is reached, the input force and the output force of the air pressure booster are increased in equal quantity; when the brake is canceled, the valve is in a closed state along with the continuous reduction of the input force, the cavity of the pneumatic booster A, B is communicated, and high-pressure air flows into the cavity B from the cavity A and is discharged into the atmosphere through the channel, the gap between the booster piston and the output push rod seat, the exhaust groove of the output push rod seat and the exhaust hole on the piston return spring seat. The invention can improve the braking performance, and can be used for hydraulic braking light trucks with national fifth emission standard, and the same high-pressure air source as urea supply system, thereby omitting a vacuum servo system part and reducing the cost of the whole truck.
Description
Technical Field
The invention relates to an air pressure booster assembly based on a feedback disc structure, which is suitable for a hydraulic braking system of a light truck and a medium-sized passenger car.
Background
The hydraulic braking system of the traditional light truck mainly adopts a vacuum booster assembly, and the vacuum booster assembly is limited by the structure, the size and the atmospheric pressure, so that the hydraulic braking system can be only applied to the light truck with small tonnage; meanwhile, aiming at the national fifth emission standard, the light truck is required to be provided with a high-pressure air source as a drive of the urea supply system. Therefore, replacing vacuum boosters with pneumatic boosters has been a significant problem in the improvement of hydraulic brake systems for light trucks.
Disclosure of Invention
The invention provides a pneumatic booster assembly based on a feedback disc structure, which aims to solve the technical problems that the booster effect of a vacuum booster assembly is weak, and the brake pedal compliance and the brake feel are poor when the existing pneumatic booster using high-pressure air as a booster source is braked.
The invention aims at realizing the following technical scheme:
The pneumatic booster assembly based on the feedback disc structure mainly comprises an input force push rod 1, an air inlet seat 2, a guide sleeve 4, a booster balance mechanism, a valve column seat 6, a valve return spring 7, a valve 9, a rear shell 10, a booster piston 16, a pressing block 18, a front shell 20, a reinforcing plate 21, an exhaust port 22, an output force push rod 23, a piston return spring 24, a piston return spring seat 25, an output push rod seat 26, an input force push rod anti-falling mechanism 30 and a sealing ring assembly;
The power-assisted balance mechanism consists of a valve column 5, a locking block 11, a guide sleeve return spring 12 and a feedback disc 19; the input force push rod anti-falling mechanism 30 consists of a boss of the input force push rod 1, a vulcanization retainer ring 32 and an elastic retainer ring 31 for holes, and the input force push rod 1 is connected with the air inlet seat 2 through the anti-falling mechanism 30; the sealing ring assembly consists of an O-shaped sealing ring I8, an O-shaped sealing ring II13, an O-shaped sealing ring III17, an O-shaped sealing ring IV 3 and an O-shaped sealing ring V38;
The guide sleeve 4 is arranged between the valve column seat 6 and the rear shell 10, and a guide sleeve sealing ring 27 and a guide sleeve 28 are arranged between the guide sleeve 4 and the rear shell 10; the air inlet seat 2 is provided with a high-pressure air inlet, the air inlet seat 2 is in threaded connection with the guide sleeve 4 and is sealed through an O-shaped sealing ring IV 3, and the other end of the guide sleeve 4 is sleeved on a booster piston 16 provided with a booster piston sealing ring 14 and a booster piston guide sleeve 15 through an O-shaped sealing ring II 13;
The rear shell 10 is connected with the front shell 20 through bolts and is provided with a sealing ring V38 to form a closed cavity, and the booster piston 16 divides the closed cavity into a booster cavity A and an atmosphere cavity B; a pressing block 18 and a feedback disc 19 are arranged between the booster piston 16 and an output push rod seat 26, the pressing block 18 can be pushed by the valve column 5 to slide and is contacted with the feedback disc 19, the output push rod seat 26 fixes the feedback disc 19 between the booster piston 16 and the output push rod seat 26 through a piston return spring 24 and a piston return spring seat 25, the piston return spring seat 25 is pressed against the booster piston 16, and an output force push rod 23 is fixed on the output push rod seat 26;
the reinforcing plate 21 is positioned between the front shell 20 and the piston return spring 24, and the exhaust port 22 is welded on the front shell 20;
The valve column seat 6 is provided with an air inlet 33, and the valve 9 is sleeved on the valve column seat 6 through a sealing ring I8; the valve column 5 is in interference fit and threaded connection with the valve column seat 6 and the locking block 11 respectively, and the valve 9 forms a closed high-pressure air cavity with the valve seat 6, the guide sleeve 4 and the air inlet seat 2 under the action of the valve return spring 7 and the locking block 11; and a guide sleeve return spring 12 and an O-shaped sealing ring III17 are arranged between the locking block 11 and the booster piston 16.
The outer side of the guide sleeve 4 is sleeved with a dust cover 29 which is fixed on the air inlet seat 2 and the rear shell 10.
The push rod seat 26 is also provided with two positioning grooves 36 and eight exhaust grooves 37.
The booster piston 16 is provided with an air inlet channel e34 and an air outlet channel f35 which are communicated with the booster cavity A, and the booster piston 16 is communicated with the atmosphere cavity B through a gap between the booster piston 16 and the output push rod seat 26, an air outlet groove 37 of the output push rod seat 26 and an air outlet hole 39 on the piston return spring seat 25.
The intake passage e34 and the exhaust passage f35 are each three or eight.
In an ideal state, the working principle of the pneumatic booster is as follows:
During braking, pedal force is transmitted to the input push rod 1, the guide sleeve return spring 12 is compressed, the input push rod 1, the air inlet seat 2, the guide sleeve 4, the valve 9, the valve column 5 and the locking piece 11 move forwards together, the input push rod 1, the air inlet seat 2, the guide sleeve 4, the valve 9, the valve column 5 and the locking piece 11 move forwards to the position where the valve is to be opened, namely the booster piston 16 is just contacted with the valve 9, and is at the equilibrium position when the pneumatic booster is boosted, at the moment, the pressing block 18 is just contacted with the feedback disc 19, the valve column 5 moves forwards continuously, high-pressure air enters the cavity A of the pneumatic booster through the valve 9 and the channel e, and servo force is generated. Because the material of the feedback disc 19 has the characteristic that the pressures at the stressed surfaces are equal, the servo force is increased in a fixed proportion along with the gradual increase of the input force of the valve column 5, so that the brake has good follow-up property and steering feel. When the maximum servo force is reached, the value is constant, the input force is continuously increased, the input force and the output force of the pneumatic booster are increased in equal quantity, and the force transmission is acted on the booster piston 16 by the locking block 9.
When the braking is canceled, the valve column 5 moves backwards along with the reduction of the input force, when the maximum boosting point is reached, the valve 9 is just closed, and along with the continuous reduction of the input force, the valve 9 is in a closed state, at the moment, the cavities of the air pressure booster A, B are communicated, high-pressure air flows into the atmosphere from the cavity A through a gap between the channel e and the booster piston 16 and the output push rod seat 25, the exhaust groove 37 of the output push rod seat 26 and the exhaust hole 39 on the piston return spring seat 25, the pressure of the cavity A is reduced, the servo force is reduced, the guide sleeve 4, the valve 9, the valve column 5 and the locking piece 11 move backwards, so that the servo force is reduced in a fixed proportion along with the gradual reduction of the input force until the braking is completely canceled.
The working principle of the structure is as follows: under the state of no braking, the guide sleeve is pushed against the rear shell by the guide sleeve return spring, the valve is in a closed state, and the valve and the locking block are tightly pressed together by the valve return spring, so that high-pressure air is isolated from entering the cavity A of the booster, and at the moment, the cavity A, B of the pneumatic booster is at atmospheric pressure.
During braking, pedal force is transmitted to an input push rod, a guide sleeve return spring is compressed, the input force push rod, an air inlet seat, the guide sleeve, the valve column and the locking piece move forwards together, the input force push rod, the air inlet seat, the guide sleeve, the valve column and the locking piece move forwards to a position where the valve is about to be opened, namely, a booster piston is just contacted with the valve, namely, an equilibrium position of the pneumatic booster during boosting is reached, the pressing piece is just contacted with a feedback disc at the moment, the valve column moves forwards continuously, the valve is opened, high-pressure air enters a cavity A of the pneumatic booster through the valve and a channel e, and servo force is generated. Because the material of the feedback disc has the characteristic that the pressure at the stressed surface is equal, the servo force is increased in a fixed proportion along with the gradual increase of the input force of the valve column, so that the brake has good follow-up property and steering feel. When the maximum servo force is reached, the value of the maximum servo force is a constant, the input force is continuously increased, the input force and the output force of the pneumatic booster are increased in equal quantity, and the force transmission is acted on the booster piston by the locking block.
When the braking is canceled, the valve column moves backwards along with the reduction of the input force, when the maximum boosting point is reached, the valve is just closed, and along with the continuous reduction of the input force, the valve is in a closed state, at the moment, the cavity of the pneumatic booster A, B is communicated, high-pressure air flows into the cavity B from the cavity A through the gap between the channel e and the booster piston and the output push rod seat, the exhaust groove of the output push rod seat and the exhaust port on the piston return spring seat to be discharged into the atmosphere, the pressure of the cavity A is reduced, the servo force is reduced, the guide sleeve, the valve column and the locking piece move backwards, so that the servo force is reduced in a fixed proportion along with the gradual reduction of the input force until the braking is completely canceled.
Compared with the prior art, the invention has the beneficial effects that: compared with a vacuum booster, the pneumatic booster assembly based on the feedback disc structure has the advantages that the braking capacity of the pneumatic booster assembly is obviously improved, and the braking effect is good; the feedback disc structure is adopted, so that the brake pedal has good follow-up property and steering feel during braking; the hydraulic braking system applied to the large-tonnage light truck has low cost compared with a pneumatic braking system; the hydraulic braking light truck aiming at the national fifth emission standard adopts the invention, can adopt the same high-pressure air source with the urea supply system, omits a vacuum servo system part, and greatly reduces the cost of the whole truck.
Drawings
Fig. 1 is an overall structure and a cross-sectional view of the present invention.
FIG. 2 is a cross-sectional view of an input force pushrod anti-drop mechanism of the present invention.
Fig. 3 is an isometric view of the present invention.
Fig. 4 is an isometric view of a valve stem mount of the present invention.
Fig. 5 is an isometric view of a piston of the present invention.
Fig. 6 is an isometric view of the output pushrod mount of the present invention.
Fig. 7 is an isometric view of a piston return spring seat of the present invention.
In the figure, 1, an input force pushrod 2, an intake seat 3.O, a sealing ring IV 4, a guide sleeve 5, a valve post 6, a valve post seat 7, a valve return spring 8.O, a sealing ring I9, a valve 10, a rear housing 11, a locking block 12, a guide sleeve return spring 13, an O-shaped sealing ring II 14, a power assisting piston guide sleeve 16, a power assisting piston 17, an O-shaped sealing ring III 18, a pressing block 19, a feedback disc 20, a front housing 21, a reinforcing plate 22, an exhaust port 23, an output force pushrod 24, a piston return spring 25, a piston return spring seat 26, an output pushrod seat 27, a guide sleeve sealing ring 28, a guide sleeve 29, a dust cover 30, an input force pushrod anti-falling mechanism 31, an orifice circlip 32, a vulcanization collar 33, an air inlet 34, a channel e 35, a positioning groove 37, an exhaust groove 38, an O-shaped sealing ring V39, an exhaust hole.
Detailed Description
The following describes in detail the embodiments of the present invention with reference to the drawings.
The pneumatic booster assembly based on the feedback disc structure mainly comprises an input force push rod 1, an air inlet seat 2, a guide sleeve 4, a valve column 5, a valve column seat 6, a valve return spring 7, a valve 9, a rear shell 10, a locking block 11, a guide sleeve return spring 12, a booster piston sealing ring 14, a booster piston guide sleeve 15, a booster piston 16, a pressing block 18, a feedback disc 19, a front shell 20, a reinforcing plate 21, an air outlet 22, an output force push rod 23, a piston return spring 24, a piston return spring seat 25, an output push rod seat 26, a valve seat guide sleeve 28, a dust cover 29, an input force push rod anti-falling mechanism 30 and a sealing ring.
The air inlet seat 2 is provided with a high-pressure air inlet, the air inlet seat 2 is in threaded connection with the guide sleeve 4, and the sealing of the joint is ensured through the O-shaped sealing ring IV 3; the other end of the guide sleeve 4 is sleeved on the booster piston 16 through an O-shaped sealing ring II 13; the booster piston 16 is provided with a booster piston sealing ring 14 and a booster piston guide sleeve 15; the rear shell 10 is connected with the front shell 20 through bolts and is provided with a sealing ring V38 to form a closed cavity, and the booster piston 16 divides the closed cavity into a booster cavity A and an atmosphere cavity B; a pressing block 18 and a feedback disc 19 are arranged between the booster piston 16 and the output push rod seat 26, and the pressing block 18 can be pushed by the valve column 5 to slide and contact with the feedback disc 19; the output push rod seat 26 can fix the feedback disc 19 between the booster piston 16 and the output push rod seat 26 through the piston return spring 24 and the piston return spring seat 25, the output push rod seat 26 is also provided with two positioning grooves 36 and eight exhaust grooves 37, the piston return spring seat 25 is pressed against the booster piston 16, and the output push rod seat 26 is fixedly provided with an output force push rod 23; the reinforcement plate 21 is located between the front housing 20 and the piston return spring 24, and the exhaust port 22 is welded to the front housing 20.
The valve column seat 6 is provided with an air inlet 33, the valve 9 is sleeved on the valve column seat 6 through a sealing ring I8, the guide sleeve 4 is arranged between the valve column seat 6 and the rear shell 10, a guide sleeve sealing ring 27 and a guide sleeve 28 are arranged between the guide sleeve 4 and the rear shell 10, a dust cover 29 is sleeved outside the guide sleeve 4, and the dust cover 29 is fixed on the air inlet seat 2 and the rear shell 10.
The valve column seat 6 and the valve column 5 are in interference fit, the valve column 5 is in threaded connection with the locking piece 11, and the valve 9 forms a closed high-pressure air cavity with the valve column seat 6, the guide sleeve 4 and the air inlet seat 2 under the action of the valve return spring 7 and the locking piece 11. The guide sleeve return spring 12 is arranged between the lock block 11 and the booster piston 16, the booster piston 16 is provided with an air channel e34 which is communicated with the booster cavity A, and meanwhile, the booster piston 16 is provided with an exhaust channel f35 which is communicated with the cavity B through a gap between the booster piston 16 and the output push rod seat 26, a groove on the circumference of the output push rod seat 26 and an exhaust port on the piston return spring seat 25.
The boss of the input force push rod 1, the vulcanization retainer ring 32 and the circlip 31 for holes together form an input force push rod anti-drop mechanism 30, and the input force push rod 1 is connected with the air inlet seat 2 through the anti-drop mechanism 30.
In the non-braking state, the guide sleeve return spring 12 pushes the guide sleeve 4 to the position of the rear shell 10, the valve 9 is in a closed state, and the valve return spring 7 enables the valve 9 and the locking piece 11 to be tightly pressed together, so that high-pressure air is isolated from entering the cavity A of the booster, and at the moment, the cavity A, B of the pneumatic booster is at atmospheric pressure.
During braking, pedal force is transmitted to the input push rod 1, the guide sleeve return spring 12 is firstly sleeved, the input push rod 1, the air inlet seat 2, the guide sleeve 4, the valve 9, the valve column 5 and the locking piece 11 move forwards together, the input push rod moves forwards to a position where the valve 9 is about to be opened, namely the booster piston 16 is just contacted with the valve 9, and is the balance position when the pneumatic booster is boosted, at the moment, the pressing block 18 is just contacted with the feedback disc 19, along with the continuous forward movement of the valve column 5, the valve 9 is opened, high-pressure air enters the cavity A of the pneumatic booster through the valve 9 and the channel d35, and servo force is generated. Because the material of the feedback disc 19 has the characteristic that the pressures at the stressed surfaces are equal, the servo force is increased in a fixed proportion along with the gradual increase of the input force of the valve column 5, so that the brake has good follow-up property and steering feel. When the maximum servo force is reached, the value is constant, the input force is continuously increased, the input force and the output force of the pneumatic booster are increased in equal quantity, and the force transmission is acted on the booster piston 16 by the locking block 11.
When the braking is canceled, the valve column 5 moves backwards along with the reduction of the input force, when the maximum boosting point is reached, the valve 9 is just closed, and along with the continuous reduction of the input force, the air pressure booster A, B is communicated with the cavity, high-pressure air flows into the atmosphere from the cavity A through the channel d35, the channel e34, the gap between the booster piston 16 and the output push rod seat 26, the exhaust groove 37 of the output push rod seat 26 and the exhaust hole 39 on the piston return spring seat 25, the pressure of the cavity A is reduced, the servo force is reduced, the air inlet seat 2, the guide sleeve 4, the valve 9, the valve column 5 and the locking block 11 move backwards, so that the servo force is also reduced in a fixed proportion along with the gradual reduction of the input force until the braking is completely canceled.
Claims (1)
1. Air pressure booster assembly based on feedback disk structure, its characterized in that: the device mainly comprises an input force push rod (1), an air inlet seat (2), a guide sleeve (4), a power-assisted balance mechanism, a valve column seat (6), a valve return spring (7), a valve (9), a rear shell (10), a power-assisted piston (16), a pressing block (18), a front shell (20), a reinforcing plate 21, an exhaust port (22), an output force push rod (23), a piston return spring (24), a piston return spring seat (25), an output push rod seat (26), an input force push rod anti-falling mechanism (30) and a sealing ring component;
The power-assisted balance mechanism consists of a valve column (5), a locking block (11), a guide sleeve return spring (12) and a feedback disc (19); the input force push rod anti-drop mechanism (30) consists of a boss of the input force push rod (1), a vulcanization retainer ring (32) and an elastic retainer ring (31) for holes, and the input force push rod (1) is connected with the air inlet seat (2) through the anti-drop mechanism (30); the sealing ring assembly consists of an O-shaped sealing ring I (8), an O-shaped sealing ring II (13), an O-shaped sealing ring III (17), an O-shaped sealing ring IV (3) and an O-shaped sealing ring V (38);
The guide sleeve (4) is arranged between the valve column seat (6) and the rear shell (10), and a guide sleeve sealing ring (27) and a guide sleeve (28) are arranged between the guide sleeve and the rear shell (10); the air inlet seat (2) is provided with a high-pressure air inlet, the air inlet seat (2) is in threaded connection with the guide sleeve (4) and is sealed through the O-shaped sealing ring IV (3), and the other end of the guide sleeve (4) is sleeved on the booster piston (16) provided with the booster piston sealing ring (14) and the booster piston guide sleeve (15) through the O-shaped sealing ring II (13);
The rear shell (10) is connected with the front shell (20) through bolts and is provided with a sealing ring V (38) to form a closed cavity, and the booster piston (16) divides the closed cavity into a booster cavity A and an atmosphere cavity B; a pressing block (18) and a feedback disc (19) are arranged between the booster piston (16) and the output push rod seat (26), the pressing block (18) can be pushed by the valve column (5) to slide and is contacted with the feedback disc (19), the output push rod seat (26) is used for fixing the feedback disc (19) between the booster piston (16) and the output push rod seat (26) through a piston return spring (24) and a piston return spring seat (25), the piston return spring seat (25) is pressed against the booster piston (16), and an output force push rod (23) is fixed on the output push rod seat (26);
The reinforcing plate (21) is positioned between the front shell (20) and the piston return spring (24), and the exhaust port (22) is welded on the front shell (20);
The valve column seat (6) is provided with an air inlet (33), and the valve (9) is sleeved on the valve column seat (6) through a sealing ring I (8); the valve column (5) is in interference fit and threaded connection with the valve column seat (6) and the locking block (11) respectively, and the valve (9) forms a closed high-pressure air cavity with the valve seat (6), the guide sleeve (4) and the air inlet seat (2) under the action of the valve return spring (7) and the locking block (11); a guide sleeve return spring (12) and an O-shaped sealing ring III (17) are arranged between the locking block (11) and the booster piston (16);
The outer side of the guide sleeve (4) is sleeved with a dust cover (29) which is fixed on the air inlet seat (2) and the rear shell (10); the push rod seat (26) is also provided with two positioning grooves (36) and eight exhaust grooves (37); an air inlet channel e (34) and an air outlet channel f (35) which are communicated with the power-assisted cavity A are formed in the power-assisted piston (16), and the power-assisted piston is communicated with the atmosphere cavity B through a gap between the power-assisted piston (16) and the output push rod seat (26) and an air outlet groove (37) on the output push rod seat (26) and an air outlet (39) on the piston return spring seat (25); the number of the air inlet channels e (34) and the number of the air outlet channels f (35) are three or eight;
In the non-braking state, the guide sleeve return spring 12 can push the guide sleeve 4 to the position of the rear shell 10, the valve 9 is in a closed state, and the valve return spring 7 enables the valve 9 and the locking block 11 to be tightly pressed together, so that high-pressure air is isolated from entering the cavity A of the booster, and at the moment, the cavity A, B of the pneumatic booster is at atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711082360.0A CN107901898B (en) | 2017-11-07 | Pneumatic booster assembly based on feedback disc structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711082360.0A CN107901898B (en) | 2017-11-07 | Pneumatic booster assembly based on feedback disc structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107901898A CN107901898A (en) | 2018-04-13 |
| CN107901898B true CN107901898B (en) | 2024-06-04 |
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Citations (8)
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|---|---|---|---|---|
| FR1052891A (en) * | 1952-02-05 | 1954-01-28 | Bendix Sa | Improvements to servomotors that can be applied to the control of vehicle brakes |
| EP1386810A1 (en) * | 2002-08-03 | 2004-02-04 | Haldex Brake Products GmbH | Combined valve for trailer vehicles having a parking brake |
| CN2883109Y (en) * | 2006-01-10 | 2007-03-28 | 陈仲明 | Pneumatic booster |
| CN202082313U (en) * | 2011-05-05 | 2011-12-21 | 北汽福田汽车股份有限公司 | Pneumatic power assisting device and automobile clutch system with same |
| CN104192109A (en) * | 2014-09-24 | 2014-12-10 | 瑞立集团瑞安汽车零部件有限公司 | Air booster with brake master cylinder |
| CN205632463U (en) * | 2016-05-06 | 2016-10-12 | 清华大学 | Adopt electronic braking air compressor machine system of improved generation air -vent valve |
| CN107176153A (en) * | 2017-06-22 | 2017-09-19 | 中国第汽车股份有限公司 | Brake fluid system air booster assembly |
| CN207579851U (en) * | 2017-11-07 | 2018-07-06 | 中国第一汽车股份有限公司 | Air booster assembly based on feedback dish structure |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1052891A (en) * | 1952-02-05 | 1954-01-28 | Bendix Sa | Improvements to servomotors that can be applied to the control of vehicle brakes |
| EP1386810A1 (en) * | 2002-08-03 | 2004-02-04 | Haldex Brake Products GmbH | Combined valve for trailer vehicles having a parking brake |
| CN2883109Y (en) * | 2006-01-10 | 2007-03-28 | 陈仲明 | Pneumatic booster |
| CN202082313U (en) * | 2011-05-05 | 2011-12-21 | 北汽福田汽车股份有限公司 | Pneumatic power assisting device and automobile clutch system with same |
| CN104192109A (en) * | 2014-09-24 | 2014-12-10 | 瑞立集团瑞安汽车零部件有限公司 | Air booster with brake master cylinder |
| CN205632463U (en) * | 2016-05-06 | 2016-10-12 | 清华大学 | Adopt electronic braking air compressor machine system of improved generation air -vent valve |
| CN107176153A (en) * | 2017-06-22 | 2017-09-19 | 中国第汽车股份有限公司 | Brake fluid system air booster assembly |
| CN207579851U (en) * | 2017-11-07 | 2018-07-06 | 中国第一汽车股份有限公司 | Air booster assembly based on feedback dish structure |
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