CN2652742Y

CN2652742Y - Motor vehicle electric brake device

Info

Publication number: CN2652742Y
Application number: CN 200320114648
Authority: CN
Inventors: 郭立
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-14
Filing date: 2003-11-14
Publication date: 2004-11-03
Anticipated expiration: 2013-11-14

Abstract

The utility model relates to an electric braking device for vehicles, which is characterized in that an electric braking unit (12) is provided on the wheels of a vehicle of the prior art; the input terminal of the electric braking unit (12) is connected to the output terminal of the load testing circuit (11) inside the electric control unit (5); a displacement sensor (3) is provided with the braking operative mechanism of a vehicle of the prior art. The utility model effects on the brakes of the wheels directly by controlling physical energy generated by the motor to realize adjustment for braking pressure upon the wheels, so that effective braking control of the vehicle wheels can be realized. The utility model has the advantages of simple structure, high reliability for the braking system and low cost.

Description

The self-propelled vehicle electrical braking device

One, technical field:

The utility model relates to a kind of self-propelled vehicle member, relates in particular to a kind of self-propelled vehicle electrical braking device.

Two, background technology:

At present, motor vehicle hydraulic brake system is at control of braking or when travelling dynamic adjustments, must dispose complicated fluid control regulating mechanism, this type of regulating mechanism mainly is made of hydraulic braking master cylinder, servo-unit, boost pump, dump pump, accumulator, solenoid regulated valve group, hydraulic oil transfer line, hydraulic braking wheel cylinder etc., structure is quite complicated, simultaneously, so complicated actuating unit causes is not only the cost height, and causes the reliability decrease of brake system easily.

Three, summary of the invention:

The purpose of this utility model provides a kind of self-propelled vehicle electrical braking device, by changing the structure of existing motor vehicle hydraulic brake system, the existing motor vehicle hydraulic brake system complex structure of solution, the problem that cost is high.

Specific embodiments of the present utility model is: a kind of self-propelled vehicle electrical braking device, comprise brake pedal, brake-applying handle, alarm lamp, ECU (Electrical Control Unit), ignition lock, storage battery, direction angle sensor, lateral acceleration sensor, it is characterized in that: former car wheel is provided with the electrodynamic braking unit, the mouth of the load detecting circuit in the input end of electrodynamic braking unit and the ECU (Electrical Control Unit) is connected, and is provided with displacement pickup in former car brake operation mechanism.

This programme is provided with the electrodynamic braking unit by former car wheel, mechanism is provided with displacement pickup at brake operation, displacement pickup sends the desired brake pressure signal that applies of chaufeur to ECU (Electrical Control Unit), this signal comprises the slipper stroke that produces according to driving behavior and handles the acceleration/accel parameter, this sensor output analog signal is preferably designed so that linearity potentiometer.The parameter that receives by wheel speed sensors is transferred to central process unit and combines with the parametric analysis that central process unit is imported in advance, determine the brake pressure value distribution of each wheel, output control is disposed at the electrodynamic braking unit on each wheel again, thereby realizes control of braking.

Adopt the beneficial effect of such scheme to be: the mechanical energy that produces by the control motor directly acts on the drg of wheel, the enforcement wheel brake pressure is regulated, thereby effectively vehicle wheels is carried out control of braking, and is simple in structure, brake system reliability height, cost is low.

Four, description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the electronic circuitry of ECU (Electrical Control Unit) 5 in the utility model;

Fig. 3, Fig. 4 are a kind of example structure scheme drawings of electrodynamic braking unit 12 in the utility model;

Fig. 5 is the another kind of example structure scheme drawing of electrodynamic braking unit 12 in the utility model.

Five, the specific embodiment:

From Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 is as can be known: the utility model is mainly by brake pedal 1, brake-applying handle 2, displacement pickup 3, alarm lamp 4, ignition lock 6, storage battery 7, constant voltage power suspply 8, central process unit 9, driving circuit 10, load detecting circuit 11, electrodynamic braking unit 12, wheel speed sensors 13, direction angle sensor 14, lateral acceleration sensor 15, photoelectricity is isolated load module 16, drive motor 17, scroll bar 18, piston 19, cam 20, brake disc 21, drive motor 22, scroll bar 23, piston 24, jacking block 25 is formed, it is characterized in that: former car wheel is provided with electrodynamic braking unit 12, the mouth of the load detecting circuit 11 in the input end of electrodynamic braking unit 12 and the ECU (Electrical Control Unit) 5 is connected, and is provided with displacement pickup 3 in former car brake operation mechanism.Brake pedal 1 and brake-applying handle 2 are former car brake operation mechanism in the utility model.

From Fig. 1, Fig. 2 also as can be known: ECU (Electrical Control Unit) 5 is isolated load module 16 and is formed by constant voltage power suspply 8, central process unit 9, driving circuit 10, load detecting circuit 11, photoelectricity, wherein the input end of central process unit 9 is connected with the mouth that photoelectricity is isolated load module 16, load detecting circuit 11, the mouth of central process unit 9 connects the input end of driving circuit 10, and constant voltage power suspply 8 provides power supply for respectively central process unit 9 and driving circuit 10.That central process unit 9 adopts is chip 8XC196KX, driving circuit 10 is mainly by NAND gate U21, U22, U23, U24, light idol U3, U4, field effect transistor T1, T2, resistance R 4, R5, R6, R7, capacitor C 4 is formed, and load detecting circuit 11 is mainly by diode D2～D5, capacitor C 5, C6, resistance R 8, R9, R10, photoelectricity is isolated U5 and is formed, photoelectricity is isolated load module 16 and is made up of U6, constant voltage power suspply output+12v/+24v and-12v/-24v, wheel speed sensors 13 employing Hall elements.

From Fig. 3, Fig. 4 also as can be known: electrodynamic braking unit 12 is as a kind of embodiment, it mainly is made of drive motor 17, scroll bar 18, piston 19, cam 20, brake disc 21, wherein drive motor 17 is connected with load detecting circuit 11 in the ECU (Electrical Control Unit) 5, scroll bar 18 is installed on the output shaft of drive motor 17, scroll bar 18 and cam 20 engagements, an end of cam 20 contacts with brake disc 21 by piston 19.

From Fig. 5 further as can be known: electrodynamic braking unit 12 is as another kind of embodiment, it mainly is made of drive motor 22, scroll bar 23, piston 24, jacking block 25, drive motor 22 is connected with load detecting circuit 11 in the ECU (Electrical Control Unit) 5, scroll bar 23 is installed on the output shaft of drive motor 22, be with piston 24 outside the scroll bar 23, there is jacking block 25 in the outside of piston 24.

Principle of work of the present utility model is: exercising under the dynamics Controlling state, the displacement pickup 3 that is connected the brake operation mechanism under the brake pedal 1 sends the desired brake pressure signal that applies of chaufeur to ECU (Electrical Control Unit) 5, this signal comprises the brake-pedal travel that produces according to driving behavior and handles the acceleration/accel parameter, this sensor output analog signal is preferably designed so that linearity potentiometer.ECU (Electrical Control Unit) 5 reads wheel speed sensors information simultaneously, both are in conjunction with carrying out analyzing and processing, produce one group of brake control pressure value that is put into form, this form has been listed according to chaufeur and has been wished the corresponding brake pressure value of the brake-pressure that applies, this group force value is transported to motor drive circuit 10, produce the two-way level pressure pulse drive signal of direct drive motor, this pulse drive signal has pulse duration modulation and warbled characteristic.ECU (Electrical Control Unit) 5 detects motor load parameter and wheel speed sensors 13 parameter changing values in real time in output pulse signal, differentiate brake pressure value with this and whether meet the force value that chaufeur wishes and revise this value.The motor load parameter records by load detecting circuit 11.The output pin P that promptly works as central process unit 9 ₂During the output high level, the T1 conducting, the running of motor M forward, the scroll bar on the motor shaft 18 drives cams 20 at this moment, and an end of cam 20 tightens brake disc 21 by piston 19, as the output pin P of central process unit 9 ₂During output low level, the T2 conducting, the motor M antiport, the scroll bar on the motor shaft 18 drives cams 20 at this moment, and an end of cam 20 unclamps brake disc 21 by piston 19, and same reason is as the output pin P of central process unit 9 ₂When output high level or low level, also can drive piston 24 by the scroll bar on the output shaft of motor M 23, piston 24 is realized tensioning by 25 pairs of brake wheels of jacking block or is unclamped.Under the dynamic adjustments state that travels, ECU (Electrical Control Unit) 5 is by wheel speed sensors 13, detect the wheel with the trend of skidding or locking trend, contrast brake-pressure and apply situation wheel is implemented brake-pressure regulation this moment, and its regulative mode is identical with above-mentioned pressure control mode; When implementing braking during standstill, be connected in switching value signal of brake operation mechanism position sensor 3 outputs of brake-applying handle, have only when being used for braking handle of motorcycles, output be only aforesaid analog signal, ECU (Electrical Control Unit) 5 is according to parking brake signals, the locked braking during standstill of realizing vehicle of electrodynamic braking unit 12 synchronous brakings of two front-wheels of drive controlling or two trailing wheels.

Claims

1, a kind of self-propelled vehicle electrical braking device, comprise brake pedal (1), brake-applying handle (2), alarm lamp (4), ECU (Electrical Control Unit) (5), ignition lock (6), storage battery (7), direction angle sensor (14), lateral acceleration sensor (15), it is characterized in that: former car wheel is provided with electrodynamic braking unit (12), the mouth of the load detecting circuit (11) in the input end of electrodynamic braking unit (12) and the ECU (Electrical Control Unit) (5) is connected, and is provided with displacement pickup (3) in former car brake operation mechanism.

2, self-propelled vehicle electrical braking device according to claim 1, it is characterized in that: ECU (Electrical Control Unit) (5) is isolated load module (16) and is formed by constant voltage power suspply (8), central process unit (9), driving circuit (10), load detecting circuit (11), photoelectricity, wherein the input end of central process unit (9) connects the mouth that photoelectricity is isolated load module (16), load detecting circuit (11), the mouth of central process unit (9) connects the input end of driving circuit (10), and constant voltage power suspply (8) provides power supply for respectively central process unit (9) and driving circuit (10).

3, self-propelled vehicle electrical braking device according to claim 1 and 2, it is characterized in that: electrodynamic braking unit (12) are made of drive motor (17), scroll bar (18), piston (19), cam (20), brake disc (21), wherein drive motor (17) is connected with load detecting circuit (11) in the ECU (Electrical Control Unit) (5), scroll bar (18) is installed on the output shaft of drive motor (17), scroll bar (18) and cam (20) engagement, an end of cam (20) contacts with brake disc (21) by piston (19).

4, self-propelled vehicle electrical braking device according to claim 1 and 2, it is characterized in that: electrodynamic braking unit (12) are made of drive motor (22), scroll bar (23), piston (24), jacking block (25), wherein drive motor (22) is connected with load detecting circuit (11) in the ECU (Electrical Control Unit) (5), scroll bar (23) is installed on the output shaft of drive motor (22), scroll bar (23) is outer to be with piston (24), and there is jacking block (25) in the outside of piston (24).