CN110341672B - Passenger car braking system - Google Patents

Abstract

The invention discloses a passenger car braking system, which comprises an air source air channel, an air bag air channel, a service braking air channel and a parking braking air channel, wherein the air source air channel comprises an air channel from an inflating pump to air cylinders of all systems, the air bag air channel comprises a front axle air bag air channel, a middle axle air bag air channel and a rear axle air bag air channel, the service braking air channel comprises a front braking air channel, a middle axle braking air channel and a rear axle braking air channel, the parking braking air channel comprises a middle axle braking air channel and a rear axle braking air channel, a height valve is arranged in the front axle of the air bag air channel, two height valves are respectively arranged in the middle axle and the rear axle, the rear axle braking air channel selects any braking signal in the front axle braking air channel and the middle axle braking air channel, and the parking braking air channel simultaneously controls the middle axle and the rear axle. The system is simple and easy to understand, simple in structure and more reasonable in arrangement.

Description

A passenger car braking system

Technical field:

The invention relates to a passenger car braking system, which belongs to the technical field of passenger cars.

Background technique:

In order to ensure the safe driving of automobiles, increase the average speed of automobiles, and improve transportation productivity, the importance of the braking system is obvious. Clarifying the principle of the braking system and rationally arranging the valve bodies of the braking system are the basis and key points of the braking system design.

The 18-meter articulated bus is a 3-axle bus. Compared with a 2-axle bus, the braking and posture of the rear axle must be fully considered. In order to make the braking part of the car reasonable, the braking signal of the rear axle is integrated with the front axle during the service braking. The brake signal of the middle axle and the middle axle; the brake signal of the middle axle and the rear axle in the parking brake are controlled by the manual control valve at the same time; the air bag control of the middle axle and the rear axle is controlled by two height valves respectively.

Invention content:

The present invention provides a passenger car braking system in order to solve the above-mentioned problems in the prior art.

The technical solutions adopted in the present invention include: a passenger car brake system, including air source air circuit, airbag air circuit, front brake air circuit, middle bridge brake air circuit, rear axle brake air circuit, hand brake air circuit road, air pump, condenser, dryer, first and fourth circuits, second and fourth circuits, rear axle airbag air reservoir, front axle and middle axle air reservoir, rear axle height valve, middle bridge airbag, middle axle height valve, front Axle air bag, front axle height valve, rear axle service brake air cylinder, middle axle service brake air cylinder, front axle service brake air cylinder, two-way one-way valve, middle axle service brake air chamber, front axle brake air chamber, rear axle parking brake differential valve, rear axle relay valve, middle axle parking brake differential valve, middle axle relay valve, quick release valve, brake pedal, first hand brake air tank, The second hand brake air storage tank, two-position three-way solenoid valve, hand control valve and auxiliary air storage tank;

In the air source air circuit, the air pump is connected to the condenser, then to the dryer, and to the a port of the first four circuit, the b port of the first four circuit is connected to the rear axle service brake air storage tank, the first The c port of the fourth circuit is connected to the first hand brake air storage tank, the d port of the first four circuit is connected to the rear axle air bag air storage tank, the e port of the first four circuit is connected to the a' port of the second four circuit, and the second four circuit The b' port is connected to the front axle service brake air tank, the e' port of the second and fourth circuits is connected to the middle axle service brake air tank, the c' port of the second and four circuits is connected to the second hand brake air tank, the second and fourth circuits The d' port is connected to the auxiliary gas storage tank;

In the air bag air circuit, the front axle and the middle axle air storage tanks that control the front axle and the middle bridge are connected to the air outlet of the air bag air storage tank of the rear axle. One front axle height valve of the front axle controls two front axle air bags, and two The middle axle height valve controls four middle axle airbags, and the two rear axle height valves of the rear axle control four rear axle airbags;

The front brake air circuit controls the service brake of the front axle, from the front axle service brake air tank to the 12 ports of the brake pedal, through the quick release valve, the air pressure is transmitted to the brake air chamber of the front axle to perform the brake operation of the front axle. brake;

The mid-bridge brake air circuit controls the service brake of the mid-axle, from the mid-bridge service brake air tank to the 11 port of the brake pedal, through the mid-axle relay valve, the air pressure is transmitted to the mid-bridge driving brake of the mid-axle. Pneumatic chamber for service braking;

The brake air circuit of the rear axle controls the service brake of the rear axle, and the control air circuit of the front service brake and the control air circuit of the middle axle service brake are passed through the two-way one-way valve, and an air circuit signal is selected to control the rear axle. service brake;

The hand brake air circuit connects the first hand brake air storage tank and the second hand brake air storage tank in series to supply the parking brake differential valve of the middle axle and the parking brake differential valve of the rear axle respectively. The air source is a two-position three-way solenoid valve connected in series between the air storage tank and the hand control valve, and then the hand control valve respectively gives braking signals to the two differential valves for parking braking.

The present invention has the following beneficial effects: the passenger car brake system of the present invention is concise and easy to understand, simple in structure and more reasonable in arrangement.

Description of drawings:

Fig. 1 is a schematic diagram of the passenger car braking system of the present invention.

in:

1-air source air circuit; 2-airbag air circuit; 3-front brake air circuit; 4-mid-axle brake air circuit; 5-rear axle brake air circuit; 6-hand brake air circuit; Air pump; 8-condenser; 9-dryer; 10-first and fourth circuits; 11-second and fourth circuits; 12-rear axle air bag storage tank; 13-front axle and middle bridge air storage tank; 14-rear axle height valve ;15-mid-axle airbag; 16-mid-axle height valve; 17-front-axle airbag; 18-front-axle height valve; 19-rear axle service brake air reservoir; 20-mid-axle service brake air reservoir; Axle service brake air tank; 22-two-way one-way valve; 23-mid-axle service brake air chamber; 24-front axle brake air chamber; 25-rear axle parking brake differential valve; 26-rear axle relay Moving valve; 27-mid-axle parking brake differential valve; 28-mid-axle relay valve; 29-quick release valve; 30-brake pedal; 31-first hand brake air tank; 32-second hand Brake air storage tank; 33-two-position three-way solenoid valve; 34-hand control valve; 35-auxiliary air storage tank.

Detailed ways:

The present invention will be further described below in conjunction with the accompanying drawings.

The passenger car braking system of the present invention includes an air source air circuit 1, an air bag air circuit 2, a service brake air circuit and a parking brake air circuit, wherein the air source air circuit 1 includes the air circuit from the air pump 7 to the air storage cylinders of each system , the airbag air circuit 2 includes the front axle air bag air circuit, the middle axle air bag air circuit and the rear axle air bag air circuit, the service brake air circuit includes the front brake air circuit, the middle axle brake air circuit and the rear axle brake air circuit, The parking brake air circuit includes the middle axle brake air circuit and the rear axle brake air circuit. In the air bag air circuit 2, there is a height valve for the front axle, two height valves for the middle axle and rear axle respectively, and the brake air circuit for the rear axle. Select any brake signal in the front axle brake air circuit and the middle axle brake air circuit, and the parking brake air circuit controls the middle axle and the rear axle at the same time.

The gas source air circuit 1 is the air intake circuit from the air pump 7 to each air storage tank, ensuring that the air storage tanks of each system reach the required air pressure. In the schematic diagram of the system, air source air circuit 1 mainly includes airbag air circuit 2, front brake air circuit 3, middle axle brake air circuit 4, rear axle brake air circuit 5, hand brake air circuit 6 and auxiliary Gas line.

In the air source air circuit 1, the air pump 7 is connected to the condenser 8, and then to the dryer 9, and connected to the a port of the first four circuit 10, and the b port of the first four circuit 10 is connected to the rear axle service brake storage The air cylinder 19, the c port of the first four circuit 10 is connected to the first hand brake air storage tank 31, the d port of the first four circuit 10 is connected to the rear axle airbag air storage tank 12, the e port of the first four circuit 10 is connected to the second four circuit 11, the b' port of the second four circuit 11 is connected to the front axle service brake air tank 21, the e' port of the second four circuit 11 is connected to the middle bridge service brake air tank 20, the second four circuit 11 The c' port is connected to the second hand brake air storage tank 32, and the d' port of the second four circuit 11 is connected to the auxiliary air storage tank 35. The advantage is that when the pipeline of the rear axle fails, the front axle and the middle axle can still guarantee normal braking.

In the airbag air circuit 2, the front axle and the middle axle air storage cylinder 13 for controlling the front axle and the middle axle are connected to the air outlet of the airbag air storage cylinder 12 of the rear axle. For the number of height valves, the car adopts the scheme of 1 in the front, 2 in the rear, and 2 in the rear. One front axle height valve 18 of the front axle controls two front axle airbags 17, two middle axle height valves 16 of the middle bridge control four middle bridge airbags 15, and two rear axle height valves 14 of the rear axle control four rear axle airbags (not marked), to ensure the height of the vehicle body.

The front brake air circuit 3 controls the service brake of the front axle, from the service brake air tank 21 of the front axle to the a'' port of the brake pedal 30, and transmits the air pressure to the brake air chamber of the front axle through the quick release valve 29 24 to brake the front axle.

Middle bridge brake air circuit 4 controls the service brake of the middle bridge, from the middle bridge service brake air tank 20 to the b'' port of the brake pedal 30, through the middle bridge relay valve 28, the air pressure is transmitted to the middle bridge The service brake air chamber 23 of the middle bridge is used for service braking.

Rear axle brake air circuit 5 controls the service brake of the rear axle, passes the control air circuit of the front service brake and the control air circuit of the middle axle service brake through the two-way one-way valve 22, selects an air circuit signal, and controls the rear axle service brake. That is, when either the service brake of the front axle or the service brake of the middle axle is active, the service brake of the rear axle will be performed.

The hand brake air circuit 6 connects the first hand brake air tank 31 and the second hand brake air tank 32 in series, respectively supplying the parking brake differential valve 27 of the middle axle and the parking brake differential valve of the rear axle. The valve 25 provides an air source, and a two-position three-way solenoid valve 33 is connected in series between the air reservoir and the hand control valve 34, and then the hand control valve respectively gives braking signals to the two differential valves for parking braking.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, some improvements can also be made without departing from the principle of the present invention, and these improvements should also be regarded as the invention. protected range.

Claims (1)

1. A passenger car brake system, characterized in that it comprises an air source air circuit (1), an airbag air circuit (2), a front brake air circuit (3), a middle bridge brake air circuit (4), a rear axle Brake air circuit (5), hand brake air circuit (6), air pump (7), condenser (8), dryer (9), first four circuits (10), second four circuits (11) , Rear axle airbag air reservoir (12), front axle and mid-axle air reservoir (13), rear axle height valve (14), mid-axle airbag (15), mid-axle height valve (16), front axle airbag (17) , front axle height valve (18), rear axle service brake air reservoir (19), middle axle service brake air reservoir (20), front axle service brake air reservoir (21), two-way one-way valve (22), Middle axle service brake chamber (23), front axle brake chamber (24), rear axle parking brake differential valve (25), rear axle relay valve (26), middle axle parking brake differential Moving valve (27), intermediate bridge relay valve (28), quick release valve (29), brake pedal (30), first hand brake air tank (31), second hand brake air tank (32) , two-position three-way solenoid valve (33), hand control valve (34) and auxiliary air reservoir; In the gas source gas path (1), the air pump (7) is connected to the condenser (8), and then connected to the dryer (9), connected to port a of the first four circuit (10), the first four The b port of the circuit (10) is connected to the rear axle service brake air tank (19), the c port of the first four circuits (10) is connected to the first hand brake air tank (31), the d of the first four circuits (10) The port is connected to the rear axle airbag air tank (12), the e port of the first four circuit (10) is connected to the a' port of the second four circuit (11), and the b' port of the second four circuit (11) is connected to the front axle driving system. The dynamic air storage tank (21), the e' port of the second and fourth circuits (11) is connected to the middle bridge service brake air storage tank (20), and the c' port of the second and fourth circuits (11) is connected to the second hand brake air storage tank ( 32), the d' port of the second and fourth circuits (11) is connected to the auxiliary air storage tank (35); In the air bag air circuit (2), the front axle and the middle bridge air storage tank (13) for controlling the front axle and the middle bridge are connected to the air outlet of the air bag air storage tank (12) of the rear axle, and a front axle height valve (18) of the front axle ) controls two front axle airbags (17), two middle axle height valves (16) of the middle bridge control four middle bridge airbags (15), and two rear axle height valves (14) of the rear axle control four rear axle airbags; The front brake air circuit (3) controls the service brake of the front axle, and transmits the air pressure from the front axle service brake air tank (21) to the 12 ports of the brake pedal (30) through the quick release valve (29). To brake the front axle brake chamber (24) to brake the front axle; The mid-bridge brake air circuit (4) controls the service brake of the mid-bridge, from the mid-bridge service brake air tank (20) to port 11 of the brake pedal (30), through the mid-bridge relay valve (28) , the air pressure is transmitted to the mid-bridge service brake air chamber (23) of the mid-bridge for service braking; The rear axle brake air circuit (5) controls the service brake of the rear axle, and the control air circuit of the front service brake and the control air circuit of the middle axle service brake pass through the two-way one-way valve (22), and one air circuit is selected. road signal to control the service brake of the rear axle; The hand brake air circuit (6) connects the first hand brake air storage tank (31) and the second hand brake air storage tank (32) in series, respectively supplying the intermediate axle parking brake differential valve (27 ) and the rear axle parking brake differential valve (25) to provide air sources, a two-position three-way solenoid valve (33) is connected in series between the air reservoir and the hand control valve (34), and then the hand control valve supplies the two differential valves respectively Valve brake signal, for parking brake.

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