CN2418068Y - Anti-blocked braking device for automobile - Google Patents
Anti-blocked braking device for automobile Download PDFInfo
- Publication number
- CN2418068Y CN2418068Y CN 00211749 CN00211749U CN2418068Y CN 2418068 Y CN2418068 Y CN 2418068Y CN 00211749 CN00211749 CN 00211749 CN 00211749 U CN00211749 U CN 00211749U CN 2418068 Y CN2418068 Y CN 2418068Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- wheel
- master cock
- wheel speed
- vehicle
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Regulating Braking Force (AREA)
Abstract
The utility model relates to an anti-blocked braking device for an automobile, which comprises wheel speed sensors, braking pressure regulators, and an electronic controller. The braking pressure regulators are composed of electromagnetic valves and electromagnetic plunger pistons, and are positioned in an auxiliary oil cylinder arranged in each wheel brake braking oil circuit. The electronic controller comprises a circuit which is connected with each wheel speed sensor and is used for controlling the power on-off state of the electromagnetic valves and the electromagnetic plunger pistons, and an alarm circuit of the circuit. The utility model has the characteristics of simple structure, low cost, and good reliability. The anti-blocked braking device for an automobile is a brake braking device which can efficiently prevent wheels from being blocked in the braking process of automobile brakes.
Description
The utility model relates to a kind of automobile in the drag process, prevents that automotive wheel is by the brake equipment of locking.
At present, for preventing automobile in the drag process, wheel is by locking, and the anti-lock brake system that adopts mostly is the braking device of the cyberante drag actr work of joining with vehicle-wheel speed sensor greatly.If to be whole apparatus structure complexity, cost higher that abnormal signal input automatic computer is arranged for its weak point, to cause that the drag actr produces misoperation, influence the cruising of automobile or do not have in the drag process, prevent that wheel is by the brake action of locking, therefore its reliability is relatively poor, also is not easy to install and maintenance.
The purpose of this utility model provide a kind of simple in structure, cost is low, reliability automobile anti-lock braking brake equipment preferably.
The purpose of this utility model is achieved in that it comprises vehicle-wheel speed sensor, brake-pressure controller, electronic controller, that this brake-pressure controller is made up of electromagnetic valve and electromagnetic plunger and be arranged in the auxiliary oil cylinder of each wheel brake brake circuit, electronic controller is to link to each other with each vehicle-wheel speed sensor and be used for the circuit and the warning circuit thereof of control electromagnetic valve door and electromagnetic plunger switching electricity.
The above-mentioned circuit that is used for control electromagnetic valve door, electromagnetic plunger switching electricity is served as reasons and is connected in parallel on the two ends of being made up of power supply in brake pedal master cock, warning circuit master cock, total relay control switch, deceleration/decel master cock, the car, loop respectively after contactless electronic beam switch, the electromagnetic valve of this wheel auxiliary oil cylinder, the electromagnetic plunger of each vehicle-wheel speed sensor control is connected in series successively, and always relay control switch and deceleration/decel master cock are connected in parallel; Above-mentioned warning circuit is as an input end by each vehicle-wheel speed sensor, the electromagnetic valve of this wheel, electromagnetic plunger serial connection back are as another input end, and the Exclusive-OR gate (XOR gate) decision circuit of its output termination one not gate is connected in parallel on the two ends of being made up of power supply, alarm lamp, warning circuit master cock, loop respectively.
The above-mentioned control electromagnetic valve door that is used for, electromagnetic plunger is logical, the circuit of outage can also be the contactless electronic beam switch by each vehicle-wheel speed sensor control, thyristor gating circuit, the circuit series that the electromagnetic plunger of this wheel auxiliary oil cylinder composes in series successively and by silicon control, the circuit series that the electromagnetic valve of this wheel auxiliary oil cylinder composes in series successively is connected in parallel on respectively by the brake pedal master cock, the warning circuit master cock, total relay control switch, the deceleration/decel master cock, the two ends, loop that power supply is formed in the car, and total relay control switch and deceleration/decel master cock are connected in parallel, the SCR control utmost point and trigger circuit join.Above-mentioned warning circuit be electromagnetic plunger by each vehicle-wheel speed sensor, this wheel respectively as input end, the Exclusive-OR gate (XOR gate) decision circuit of output termination one not gate with by the electromagnetic valve of each vehicle-wheel speed sensor, this wheel respectively as the joint denial gate decision circuit of input end respectively as input end or gate logic be connected in parallel on the two ends of forming by power supply, alarm lamp, warning circuit master cock, loop respectively.
Above-mentioned total relay control switch is to be connected total relay control switch two ends by vehicle-wheel speed sensor after parallel with one another; Above-mentioned deceleration/decel master cock is to be controlled as the AND gate of input end respectively by deceleration/decel sensor, brake pedal master cock.
Adopt said structure, because automobile is in the drag process, the speed of a motor vehicle has taken place to change and has made the signal of each vehicle wheel speed sensors output that strong and weak variation has taken place accordingly, promptly the contactless electronic beam switch by each vehicle wheel speed sensors control produces disconnection, closed action, thereby controlled the electromagnetic valve that is arranged in each wheel brake brake circuit auxiliary oil cylinder, the outage of electromagnetic plunger, energising, the braking clamp is contacted with brake disc, break away from, thereby prevent that effectively wheel wheel in the drag process from being taken place by the situation of locking, and it is simple in structure, cost is lower, because being provided with warning circuit can be in time to vehicle-wheel speed sensor, electromagnetic valve, the work of electromagnetic plunger is monitored, and reliability is better, be easy for installation and maintenance.
In sum, the utility model has the advantages that: simple in structure, cost is lower, reliability is better, can prevent effectively that wheel is by locking in the drag process.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the structure principle chart of the utility model automobile anti-lock braking brake equipment.
Fig. 2 is the control circuit schematic diagram of a kind of embodiment of the utility model automobile anti-lock braking brake equipment.
Fig. 3 is total relay control switch schematic circuit diagram shown in Figure 2.
Fig. 4 is a kind of scheme schematic circuit diagram of the contactless electronic beam switch of wheel speed sensors control shown in Figure 2.
Fig. 5 is the another kind of scheme schematic circuit diagram of the contactless electronic beam switch of wheel speed sensors control shown in Figure 2.
Fig. 6 is the logical circuitry of deceleration/decel master cock shown in Figure 2.
Fig. 7 is the utility model automobile anti-lock braking brake equipment another embodiment control circuit schematic diagram.
Fig. 8 is a kind of scheme schematic circuit diagram of thyristor gating circuit shown in Figure 7.
Fig. 9 is the another kind of scheme schematic circuit diagram of thyristor gating circuit shown in Figure 7.
Figure 10 is a warning circuit schematic diagram shown in Figure 2.
Figure 11 is a warning circuit schematic diagram shown in Figure 7.
The utility model automobile anti-lock braking brake equipment is that example describes with the four-wheel automobile; As shown in Figure 1, by 4 vehicle-wheel speed sensors 1, form by electromagnetic valve 2-1, electromagnetic plunger 2-2 and lay respectively at 4 auxiliary oil cylinders 2 in each wheel brake brake circuit, be used for the circuit (showing) and the warning circuit (showing) thereof of control electromagnetic valve door 2-1, electromagnetic plunger 2-2 work as Figure 10,11 as Fig. 2,7.
Show as Fig. 2, be connected in parallel on the two ends of forming by power supply E in brake pedal master cock K1, warning circuit master cock J1, total relay control switch J, deceleration/decel master cock J2, the car, loop respectively respectively with after the electromagnetic valve 2-1 of corresponding wheel auxiliary oil cylinder 2 and electromagnetic plunger 2-2 are connected in series successively by contactless electronic beam switch kn1, the kn2 of wheel speed sensors n1, the n2 of 4 wheels, n3, n4 control, kn3, kn4, and always relay control switch J and deceleration/decel master cock J2 are connected in parallel.
Show as Fig. 3, join with total relay control switch J two ends by wheel speed sensors n1, n2, n3, the n4 of 4 wheels back parallel with one another and form total control relay circuit.
Show as Fig. 4,, form the circuit of a kind of scheme of contactless electronic beam switch of vehicle-wheel speed sensor control by power supply E, resistance R 1, R2 crystal triode T ＇ 1, T ＇ 2, wheel speed sensors n, unilateral diode D ＇ 1, electromagnetic valve 2-1, electromagnetic plunger 2-2.
Show that as Fig. 5 by power supply E, photodiode D ＇ 2, wheel speed sensors n, luminous element, resistance R 3, crystal triode T ＇ 3, electromagnetic valve 2-1, electromagnetic plunger 2-2 forms the circuit of contactless electronic beam switch another program of vehicle-wheel speed sensor control.
Showing as Fig. 6, is deceleration/decel master cock circuit as the AND gate of input end respectively by deceleration/decel sensor, brake pedal switch.
Show as Fig. 7, figure is as the utility model another embodiment control circuit: by the wheel speed sensors n1 of 4 wheels, n2, n3, the contactless electronic beam switch kn1 of n4 control, kn2, kn3, kn4 respectively with the electromagnetic plunger 2-2 of corresponding wheel auxiliary oil cylinder 2, thyristor gating circuit T1, T2, T3, the circuit series that T4 composes in series successively and by silicon control D1, D2, D3, D4, the circuit series that the electromagnetic valve 2-1 of corresponding wheel auxiliary oil cylinder 2 composes in series successively is connected in parallel on respectively by brake pedal master cock K1, warning circuit master cock J1, total relay control switch J, deceleration/decel master cock J2, the two ends, loop that power supply E forms in the car, and total cutout relay master cock J and deceleration/decel master cock J2 are connected in parallel, and the SCR control utmost point is connected with trigger circuit.
Show that as Fig. 8 a kind of scheme is the thyristor gating circuit of being made up of power supply E, resistance R 4, R5 field effect transistor T3, silicon control D ＇ 3 electromagnetic valve 2-1.
Show as Fig. 9, form another kind of scheme thyristor gating circuit by power supply E, resistance R 4, R5, crystal triode T ＇ 4, silicon control D ＇ 4, electromagnetic valve 2-1.
Show as Figure 10, as the warning circuit of control circuit shown in Figure 2 for being connected in parallel on the two ends of forming by power supply E, alarm lamp, warning circuit master cock J1, loop as electromagnetic valve 2-1, the electromagnetic plunger 2-2 serial connection back of an input end, this wheel respectively as Exclusive-OR gate (XOR gate) decision circuit of its output termination one not gate of another input end with each vehicle-wheel speed sensor n in 4 wheels.
Show as Figure 11, the warning circuit that shows control circuit as Fig. 7 for the electromagnetic plunger 2-2 of each vehicle-wheel speed sensor n, this wheel in 4 wheels respectively as input end, the Exclusive-OR gate (XOR gate) decision circuit of its output termination one not gate with by the electromagnetic valve of each vehicle-wheel speed sensor, this wheel respectively as the joint denial gate decision circuit of input end respectively as input end or gate logic be connected in parallel on the two ends of forming by power supply E, alarm lamp, warning circuit master cock J1, loop respectively.
Show as Fig. 3, preestablish when wheel slip is 15～20% cooresponding wheel speed values when the speed of a motor vehicle is brake, the signal of wheel speed sensors output is after amplification, rectification, make the contactless electronic beam switch Kn closure of wheel speed sensors control separately, when the wheel speed of 4 wheels all equals this value, total relay control switch J disconnects, and this device is closed.Automobile is in other cruising state, and total relay switch is in closure state.In the drag process, it is brake pedal master cock K1 closure, as long as when having a wheel velocity to equal setting value, the cooresponding wheel speed sensors n1 output of this wheel weak signal makes the contactless electronic beam switch Kn1 closure (showing as Fig. 2) of its control, electromagnetic valve 2-1, electromagnetic plunger 2-2 energising drives cooresponding electromagnetic core 2-1-1, and 2-2-1 distinguishes to the right, upward movement.Sealing brake circuit inlet, it is big that oil closed cavity becomes, pressure diminishes, drag clamp 3 separates with brake disc 4, wheel is not rotated further under effect of inertia by locking, because speed of a motor vehicle rising wheel speed sensors is exported strong signal, kn1 disconnects, electromagnetic plunger 2-2, electromagnetic valve 2-1 outage, electromagnetic core 2-1-1,2-2-1 is at retracing spring 2-2-2, reset under the 2-1-2 effect, oil inlet is opened, pressure oil makes braking brake pincers 3 contact with brake disc 4, and wheel velocity is lowered again, the repetition said process, all equal setting value until each wheel velocity, total relay control switch J closes.When automobile is in when running at high speed, brake deceleration degree master cock J2 closure repeats above-mentioned periodical duty process suddenly, can prevent because brake suddenly makes wheel by locking.
Show as Fig. 5, a kind of scheme as the contactless electronic beam switch of wheel speed sensors control, when wheel speed sensors is exported strong signal, by wheel speed sensors n, unilateral diode D ＇ 1, crystal triode T ＇ 1, resistance R 2 built-up circuit conductings, when wheel speed sensors output weak signal, be added in T ＇ 1 base tension and reduce, make it end T ＇ 2 base tensions and raise, final conducting, electromagnetic valve 2-1 and electromagnetic plunger 2-2 energising.
Show as Fig. 6, another kind of scheme as the contactless electronic beam switch of wheel speed sensors control, when wheel speed sensors is exported strong signal, the branch road conducting of forming by photodiode D ＇ 2, resistance R 3, when wheel speed device output weak signal, photodiode ends, and is added in voltage rising, T ＇ 3 conductings on T ＇ 3 base stages, electromagnetic valve 2-1, electromagnetic plunger 2-2 energising.
Show that as Figure 10 A1 is each vehicle wheel speed sensors input end, B1 is the input end after electromagnetic valve 2-1, the electromagnetic plunger 2-2 in each wheel auxiliary oil cylinder 2 is connected in series.When wheel speed sensors output weak signal (being 0), electromagnetic valve 2-1, electromagnetic plunger 2-2 output is also exported strong signal (being 1) for O and wheel speed sensors, and electromagnetic valve 2-1, electromagnetic plunger 2-2 output signal also are 1 o'clock, be alarm condition, it is bright to be positioned at the gauge panel alarm lamp, be in warning circuit master cock J1 disconnection in the control circuit, whole device is closed.
Show as Fig. 7, when stepping on brake pedal master cock (K1 closure), when No. 1 wheel velocity equals setting value prior to other wheel, cooresponding wheel speed sensing n1 output weak signal makes the contactless electronic beam switch kn1 closure of its control, electromagnetic plunger 2-1 energising, because the branch road conducting of electromagnetic plunger place impels the thyristor gating circuit conducting, electromagnetic valve energising drive cooresponding electromagnetic core 2-1-1,2-2-1 distinguish to the right, upward movement.Sealing brake circuit inlet, oil closed cavity becomes greatly, pressure diminishes, and drag clamp 3 separates with brake disc 4, and wheel velocity raises.Wheel speed sensors is exported strong signal, and kn1 disconnects, the electromagnetic plunger outage, and electromagnetic core 2-2-1 moves downward under retracing spring 2-2-2 effect.Pressure oil makes braking brake clamp 3 contact with brake disc 4, wheel velocity is lowered again, repeat said process, this scheme is just just finished wheel anti-lock process in the braking procedure by the switching electricity of electromagnetic plunger, and can not produce antagonistic force to brake pedal.
Show as Fig. 8, raise, make field effect transistor T ＇ 3 conductings, silicon control D ＇ 3 conductings, electromagnetic plunger conducting owing to be added in field effect transistor T ＇ 3 base tensions.
Show as Fig. 9, raise, make crystal triode T ＇ 4 conductings, silicon control D ＇ 4 conductings, electromagnetic plunger conducting owing to be added in crystal triode T ＇ 4 base tensions.
Show that as Figure 11 A1 is each vehicle wheel speed sensors input end, B1 is an electromagnetic plunger 2-2 input end in each wheel auxiliary oil cylinder 2.C is an electromagnetic valve input end in each wheel auxiliary oil cylinder 2.When wheel speed sensors output weak signal (being 0), electromagnetic plunger 2-2 is output as 0 and when wheel speed sensors is exported strong signal (being 1), electromagnetic plunger 2-2 exports strong signal (being 1) and wheel speed sensors output weak signal (being 0), electromagnetic plunger is output as 1, the electromagnetic valve output signal is 0 o'clock, is the alarm condition of the present embodiment control circuit, and the alarm lamp that at this moment is positioned at gauge panel is bright, the Alarming control switch J1 that is in the control circuit disconnects, and whole device is closed.
Because the utility model is by every to being arranged on to the control circuit that links to each other with each vehicle-wheel speed sensor Electromagnetic valve in the individual wheel brake brake circuit and the switching electricity of electromagnetic plunger are controlled, and have realized vapour Car prevents wheel by locking in the skidding process, and by warning circuit to wheel speed sensors, magnetic valve Door, electromagnetic plunger monitors, have therefore that cost is low, simple in structure, good reliability, be convenient to use and The characteristics such as maintenance.
Claims (4)
1, a kind of automobile anti-lock braking brake equipment, this device comprises vehicle-wheel speed sensor, brake-pressure controller, electronic controller, it is characterized in that: this brake-pressure controller is by electromagnetic valve (2-1) and electromagnetic plunger (2-2) is that form and auxiliary oil cylinder that be arranged in each wheel brake brake circuit (2); Electronic controller is to link to each other with each vehicle-wheel speed sensor (1), and is used for the circuit and the warning circuit thereof of control electromagnetic valve door (2-1) and electromagnetic plunger (2-2) switching electricity.
2, automobile anti-lock braking brake equipment according to claim 1, it is characterized in that: the described control electromagnetic valve door (2-1) that is used for, electromagnetic plunger (2-2) is logical, the serve as reasons contactless electronic beam switch of each vehicle-wheel speed sensor (1) control of the circuit of outage, the electromagnetic valve (2-1) of this wheel auxiliary oil cylinder (2), after being connected in series successively, electromagnetic plunger (2-2) is connected in parallel on respectively by brake pedal master cock (K1), warning circuit master cock (J1), total relay control switch (J), deceleration/decel master cock (J2), the two ends, loop that power supply (E) is formed in the car, and total relay control switch (J) is connected in parallel with deceleration/decel master cock (J2); Described warning circuit be by each vehicle-wheel speed sensor as an input end, the electromagnetic valve of this wheel, electromagnetic plunger serial connection back is connected in parallel on the two ends of being made up of power supply, alarm lamp, warning circuit master cock, loop respectively as Exclusive-OR gate (XOR gate) decision circuit of another input end, its output termination one not gate.
3, automobile anti-lock braking brake equipment according to claim 1, it is characterized in that: the described control electromagnetic valve door (2-1) that is used for, electromagnetic plunger (2-2) is logical, the circuit of outage is the contactless electronic beam switch by each vehicle-wheel speed sensor (1) control, thyristor gating circuit, the circuit series that the electromagnetic plunger (2-2) of this wheel auxiliary oil cylinder (2) composes in series successively and by silicon control, the circuit series that the electromagnetic valve (2-1) of this wheel auxiliary oil cylinder (2) composes in series successively is connected in parallel on respectively by brake pedal master cock (K1), warning circuit master cock (J1), total relay way control switch (J), deceleration/decel master cock (J2), the two ends, loop that power supply (E) is formed in the car, and total relay control switch (J) is connected in parallel with deceleration/decel master cock (J2), and the SCR control utmost point and trigger circuit join; Described warning circuit is that electromagnetic plunger by each vehicle-wheel speed sensor, this wheel is respectively as input end, the Exclusive-OR gate (XOR gate) decision circuit of its output termination one not gate with by the electromagnetic valve of each vehicle-wheel speed sensor, this wheel respectively as the joint denial gate decision circuit of input end, respectively as input end or gate logic be connected in parallel on respectively by power supply, alarm lamp, the two ends, loop that the warning circuit master cock is formed.
4, according to any one described automobile anti-lock braking brake equipment of claim 1～3, it is characterized in that: described total relay control switch is to be connected total relay control switch two ends by each vehicle-wheel speed sensor after parallel with one another; Described deceleration/decel master cock be by deceleration/decel sensor, brake pedal master cock respectively as input end with the gate logic control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00211749 CN2418068Y (en) | 2000-04-30 | 2000-04-30 | Anti-blocked braking device for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00211749 CN2418068Y (en) | 2000-04-30 | 2000-04-30 | Anti-blocked braking device for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2418068Y true CN2418068Y (en) | 2001-02-07 |
Family
ID=33578392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00211749 Expired - Fee Related CN2418068Y (en) | 2000-04-30 | 2000-04-30 | Anti-blocked braking device for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2418068Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7630807B2 (en) | 2004-07-15 | 2009-12-08 | Hitachi, Ltd. | Vehicle control system |
| CN108189825A (en) * | 2016-12-08 | 2018-06-22 | 辽宁丹东新弘源农业科技发展有限公司企业技术研究开发中心 | Vapour drags all-in-one machine brake system |
-
2000
- 2000-04-30 CN CN 00211749 patent/CN2418068Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7630807B2 (en) | 2004-07-15 | 2009-12-08 | Hitachi, Ltd. | Vehicle control system |
| US9650038B2 (en) | 2004-07-15 | 2017-05-16 | Hitachi, Ltd. | Vehicle control system |
| CN108189825A (en) * | 2016-12-08 | 2018-06-22 | 辽宁丹东新弘源农业科技发展有限公司企业技术研究开发中心 | Vapour drags all-in-one machine brake system |
| CN108189825B (en) * | 2016-12-08 | 2024-03-05 | 辽宁丹东新弘源农业科技发展有限公司企业技术研究开发中心 | Brake system for steam-towing integrated machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103921783B (en) | Utilize the system and method that brake switch and master cylinder Pressure identification are truly braked | |
| CN105667495B (en) | A kind of the electric automobile pedal control method and system of Anti-mis-stepping | |
| CN101239590B (en) | Intelligent control driver for electric eddy speed damper and its control method | |
| CN208595178U (en) | A kind of riding automobile-used redundance type electronic brake system | |
| US5922038A (en) | Vehicle-behavior control system with wheel speed failure detection | |
| CN201415674Y (en) | Manual electrical-controlled parking and auxiliary starting control system for variable-speed automobile | |
| CN110281891A (en) | Automatic parking method based on Multi-sensor Fusion | |
| CN109910843A (en) | Automatic parking method and apparatus | |
| CN2418068Y (en) | Anti-blocked braking device for automobile | |
| CN112721897A (en) | Double-control double-drive pull-wire type EPB control system and parking force self-adaptive control method | |
| CN203543925U (en) | Emergency brake device of vehicle brake-by-wire system | |
| CN104960511A (en) | Method for preventing mistaking accelerator pedal for brake pedal | |
| CN109159779A (en) | A kind of rail vehicle and its braking method, system | |
| EP0847063B1 (en) | Solenoid valve driving device | |
| CN101462493A (en) | Motor vehicle throttle pedal over-positioning contact type intelligent control and braking system | |
| CN101590827B (en) | Flat tire braking system | |
| CN110497893A (en) | A kind of unmanned car automatic breaking system | |
| CN200948796Y (en) | Safety control apparatus for misstep on automobile accelerator pedal | |
| CN1919670A (en) | Safety control method and apparatus for mis-stepping automobile accelerator pedal | |
| CN2686909Y (en) | Mechanical intelligent remedial device for emergency brake throttle malfunction for automobile | |
| CN205149839U (en) | Second grade helping hand is than no motor hydraulic braking system | |
| CN1064314C (en) | Light-emitting diode device displaying running condition of automobile and method thereof | |
| CN2492438Y (en) | Magnetic field retarder for vehicle brake system | |
| CN203009054U (en) | Speed limit control system of mechanical pump engine commercial vehicle | |
| CN106627540A (en) | Secondary power assistant rate motor-free hydraulic braking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |