WO2008085140A1 - A system providing an easy drive up on an unhill road for a bus having a pneumatic brake system - Google Patents

A system providing an easy drive up on an unhill road for a bus having a pneumatic brake system Download PDF

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Publication number
WO2008085140A1
WO2008085140A1 PCT/TR2007/000020 TR2007000020W WO2008085140A1 WO 2008085140 A1 WO2008085140 A1 WO 2008085140A1 TR 2007000020 W TR2007000020 W TR 2007000020W WO 2008085140 A1 WO2008085140 A1 WO 2008085140A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
valve
park brake
unhill
vehicle
Prior art date
Application number
PCT/TR2007/000020
Other languages
French (fr)
Inventor
Ertugrul Cihan
Original Assignee
Temsa Sanayi Ve Ticaret A.S.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Temsa Sanayi Ve Ticaret A.S. filed Critical Temsa Sanayi Ve Ticaret A.S.
Publication of WO2008085140A1 publication Critical patent/WO2008085140A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/122—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger for locking of reverse movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/06—Hill holder; Start aid systems on inclined road

Definitions

  • the prevent invention is subject to a system which prevents the vehicle, that has pneumatic brake system, to go backward when driving up on an unhill road without having no use for stepping on any operating device; this is provided by means of a park brake valve and by controlling the signal air on the relay valve line with solenoid valve.
  • these pneumatic systems are such systems which are operating with pressured air, and they are being used especially for brake systems in automotive industry. Here it is aimed to impel the brake system by means of pressured air.
  • the service brake In order to prevent the bus, which has pneumatic brake system, to go backward on an unhill road, the service brake should be stepped on.
  • Figure 1 the existing type of pneumatic brake system - the piping diagram of the park brake line
  • FIG. 2 the pneumatic brake system to which the invention is applied - the piping diagram of the park brake line
  • Figure 3 the pneumatic brake system to which the invention is applied - the wiring diagram of the park brake line
  • a solenoid valve (8) is placed in between the park brake valve (3) and relay valve (4) , J... uiuci L.U pxuviue a control on the signal air.
  • the D+ signal In order to move the vehicle easy, which is in parking position on an unhill road by means of the park brake, the D+ signal should come from the alternator, and there should not be any air in the park brake air line, and thus the pressure switch no.5 should be off. In this way, the motor of the vehicle is in operating mode.
  • D+ signal should activate the Dl relay, in order to operate the system.
  • the driver presses on the ES (Easy Start) button, and thus, the Yl coil of the solenoid no .8 is being activated, and signal air is being prevented.
  • the Kl relay is used to lock the Yl coil in operating mode .
  • the logic of this invention is based on preventing the air pumping to the park brake cylinders (6, 7) , as the relay valve (4) is not being activated - contrary to the contemporary state of art - because of the solenoid (8) is off when the driver set the park brake free in order to move the vehicle from the parking point on an unhill road. In this case, the vehicle should stay in static position on an unhill road without stepping on the service brake.
  • the pressure switch no.5 will be activated and it will operate the K3 solenoid, and thus it is provided that the system will be out of service. As soon as the vehicle moves and the park brake is not being pulled up, the system will stay out of service .
  • the solenoid valve no.8 has been chosen as normally opened 3/2 valve, and the park brake system will continue to operate without endangering the security of the vehicle even in case of any electrical failures.
  • the control of the signal air is provided on the line in between park brake valve (3) and the relay valve (4) .
  • the transfer of the signal air to relay valve (4) on the departure is discontinued, the movement of the vehicle is prevented till the driver steps on the clutch pedal .

Abstract

The said invention is subject to a pneumatic brake system, which is providing a control via a solenoid valve (8) on the line between the park brake valve (3) and the relay valve (4), in order to prevent the vehicle, which has a pneumatic brake system, to go backward when moving from the parking point on an uphill road without having no use for stepping on service brake.

Description

DESCRIPTION
A SYSTEM PROVIDING AN EASY DRIVE UP ON AN UNHILL ROAD FOR A BUS HAVING A
PNEUMATIC BRAKE SYSTEM
The prevent invention is subject to a system which prevents the vehicle, that has pneumatic brake system, to go backward when driving up on an unhill road without having no use for stepping on any operating device; this is provided by means of a park brake valve and by controlling the signal air on the relay valve line with solenoid valve.
The Contemporary State of Art:
As is known, these pneumatic systems are such systems which are operating with pressured air, and they are being used especially for brake systems in automotive industry. Here it is aimed to impel the brake system by means of pressured air.
One of the biggest problems confronted with on the pneumatic brake systems which are being widely used for the contemporarily presenting vehicles, is that the vehicle goes backward when moving again from a parking point on an unhill road.
Even though, it is not entirely a technical problem, the said situation is making the drive of vehicle difficult in practice. Such types of situations are also having a risk of hitting the car parking at the back of the car which is going backward while moving from the parking point on an unhill road. The driver is practically getting over this risk just with his experience and well timing ability. Because in this situation, the service brake must be in use by all means in situation, the service brake must be JL._ ~_w .„_, ___ order .to let the vehicle (bus) be in a static position when the park brake is free while moving from the parking point on an unhill road. Furthermore, in order to move the car again, the service brake and the clutch pedal must be set free, and the gas pedal must be depressed. But, the vehicle can go backward during the elapsed time in between the driver sets the service brake and the clutch pedal free, and he depresses the gas pedal .
On the passenger cars, this problem is solved by using manually operated hand brake, and the departure process should be as follows : while setting the hand brake slowly free, the gas pedal should be stepped on and at the same time the step should be taken back from the clutch pedal.
In order to prevent the bus, which has pneumatic brake system, to go backward on an unhill road, the service brake should be stepped on.
This problem is solved, free from the personal ability and experience of the driver and without having no use for stepping on a service brake, by this invention subject to the improved patent .
Description of The Drawings;
Figure 1 the existing type of pneumatic brake system - the piping diagram of the park brake line
Figure 2 the pneumatic brake system to which the invention is applied - the piping diagram of the park brake line Figure 3 the pneumatic brake system to which the invention is applied - the wiring diagram of the park brake line
Detailed Description of The Invention:
As mentioned on the contemporary state of the art, we have such problem that the vehicle goes backward while moving from the parking point on an unhill road, and this problem is effecting our driving comfort. As can be seen on the piping diagram of the park brake line of the existing system on the Figure 1, the fundamental principle of the system is based on discharging the air pressure from the system while braking, and pumping the air again to the system while moving.
When stepping on the brake in order to fix the vehicle in static position, the air is discharged from the park brake cylinders (6, 7) and so the brake is in use by means of spring force .
While moving the vehicle again from the parking point, the pressured signal air, which has been sent from the park brake valve (3) , reaches to the relay valve (4) , and thus this valve is activated in order to provide that the air is pumped into the park brake cylinders (6, 7) and the brakes are being set free. But in the meantime, the uncontrolled air coming from relay valve (4) is causing the vehicle goes backward and in order to prevent this, the service brake should be stepped on.
In the system subject to this invention as shown on the Figure 2, a solenoid valve (8) is placed in between the park brake valve (3) and relay valve (4) , J... uiuci L.U pxuviue a control on the signal air.
In order to move the vehicle easy, which is in parking position on an unhill road by means of the park brake, the D+ signal should come from the alternator, and there should not be any air in the park brake air line, and thus the pressure switch no.5 should be off. In this way, the motor of the vehicle is in operating mode.
As seen on the wiring diagram on the Figure 3 , D+ signal should activate the Dl relay, in order to operate the system. In order to operate the system, the driver presses on the ES (Easy Start) button, and thus, the Yl coil of the solenoid no .8 is being activated, and signal air is being prevented. Here, the Kl relay is used to lock the Yl coil in operating mode .
The logic of this invention is based on preventing the air pumping to the park brake cylinders (6, 7) , as the relay valve (4) is not being activated - contrary to the contemporary state of art - because of the solenoid (8) is off when the driver set the park brake free in order to move the vehicle from the parking point on an unhill road. In this case, the vehicle should stay in static position on an unhill road without stepping on the service brake.
Setting the system out of service, in other words, getting the Yl coil again to its original position is enabled by activating the K2 relay by means of the signals coming from the transmission mechanism and the clutch pedal . When the Yl coil is back to its original position, the signal air of the park brake will activate the relay valve (4) and thus the vehicle can be moved by means of the a±x nidi xed.cjx.ea uu unts park, brake cylinders (6, 7).
In case of an existing air in the park brake line, the pressure switch no.5 will be activated and it will operate the K3 solenoid, and thus it is provided that the system will be out of service. As soon as the vehicle moves and the park brake is not being pulled up, the system will stay out of service .
The solenoid valve no.8 has been chosen as normally opened 3/2 valve, and the park brake system will continue to operate without endangering the security of the vehicle even in case of any electrical failures.
As seen in summary, by means of the solenoid valve (8) added to the said pneumatic system, the control of the signal air is provided on the line in between park brake valve (3) and the relay valve (4) . When the transfer of the signal air to relay valve (4) on the departure is discontinued, the movement of the vehicle is prevented till the driver steps on the clutch pedal .
Consequently, by means of this invention, it is prevented that the vehicle, which has pneumatic brake system, goes backward on an unhill road even the park brake is being set free and the service brake is not being stepped on, and the vehicle easily moves without having no use of any operating devices by the driver, and by depressing just the gas pedal.
By this invention, the driving comfort and safety is being provided by a technical solution without letting it to be on the account of driver's personal experience and quickness. REFERENCES
1 Air Tank
2 Pressure Regulator 3 Park Brake Valve
4 Relay Valve
5 Pressure Switch
6 Left Park Brake Cylinder
7 Right Park Brake Cylinder 8 Solenoid Valve

Claims

1. A solenoid valve (8) is characterized by the fact that, it is placed in between the park brake valve (3) and the relay valve (4) on the park brake line, in order to prevent the vehicle, which has pneumatic brake system, goes backward on an unhill road even when the park brake is being set free and any of operating device and/ or service brake is not being stepped on.
2.A solenoid valve (8) due to the Claim 1 is consisting of an Yl coil in order to prevent the signal air that is coming from park brake valve (3) when the park brake is being set free for not letting the vehicle goes backward.
3. A solenoid valve (8) due to any of the above Claims is consisting of an Yl coil, which is coming back to its original position by means of the movement of the K2 relay that is activated by the signals which are coming from the transmission mechanism and the clutch pedal .
4. When the Yl coil of a solenoid valve (8) due to any of the above Claims, comes back to its original position, the signal air of the park brake passes over the relay valve (4) and then reaches to the park brake cylinders (6, 7) .
5. The pneumatic brake system is characterized by the fact that it is consisting of a solenoid valve (8) that is mentioned in one or any of the above Claims.
PCT/TR2007/000020 2007-01-12 2007-03-01 A system providing an easy drive up on an unhill road for a bus having a pneumatic brake system WO2008085140A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2007/00164 2007-01-12
TR2007/00164U TR200700164U (en) 2007-01-12 2007-01-12 A system that provides easy starting on slopes in buses with pneumatic brakes.

Publications (1)

Publication Number Publication Date
WO2008085140A1 true WO2008085140A1 (en) 2008-07-17

Family

ID=38529626

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2007/000020 WO2008085140A1 (en) 2007-01-12 2007-03-01 A system providing an easy drive up on an unhill road for a bus having a pneumatic brake system

Country Status (4)

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ES (1) ES1069013Y (en)
IT (1) ITMI20080002U1 (en)
TR (1) TR200700164U (en)
WO (1) WO2008085140A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3052723A1 (en) * 2016-06-16 2017-12-22 Poclain Hydraulics Ind BRAKE SYSTEM MECHANICALLY MAINTAINED
DE102017007780A1 (en) * 2017-08-16 2019-02-21 Wabco Gmbh Electropneumatic parking brake module with directly controlled valves
CN109367528A (en) * 2018-08-28 2019-02-22 南京金龙客车制造有限公司 A kind of automatic parking system and its control method
WO2020138394A1 (en) * 2018-12-28 2020-07-02 ナブテスコオートモーティブ株式会社 Air supply circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911372A1 (en) * 1979-03-23 1980-10-16 Wabco Fahrzeugbremsen Gmbh BRAKE DEVICE AGAINST UNINTENDED ROLLING OF A VEHICLE
DE4446823C1 (en) * 1994-12-27 1996-01-18 Daimler Benz Ag Safety device to prevent roll=back of vehicle
EP1571061A1 (en) * 2004-03-05 2005-09-07 WABCO GmbH & CO. OHG Electrically controlled pneumatic braking system for a vehicle
WO2006097583A1 (en) * 2005-03-17 2006-09-21 Renault Trucks Braking device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911372A1 (en) * 1979-03-23 1980-10-16 Wabco Fahrzeugbremsen Gmbh BRAKE DEVICE AGAINST UNINTENDED ROLLING OF A VEHICLE
DE4446823C1 (en) * 1994-12-27 1996-01-18 Daimler Benz Ag Safety device to prevent roll=back of vehicle
EP1571061A1 (en) * 2004-03-05 2005-09-07 WABCO GmbH & CO. OHG Electrically controlled pneumatic braking system for a vehicle
WO2006097583A1 (en) * 2005-03-17 2006-09-21 Renault Trucks Braking device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3052723A1 (en) * 2016-06-16 2017-12-22 Poclain Hydraulics Ind BRAKE SYSTEM MECHANICALLY MAINTAINED
DE102017007780A1 (en) * 2017-08-16 2019-02-21 Wabco Gmbh Electropneumatic parking brake module with directly controlled valves
EP3668767B1 (en) 2017-08-16 2021-07-07 ZF CV Systems Hannover GmbH Electropneumatic parking brake module with directly controlled valves
US11400906B2 (en) 2017-08-16 2022-08-02 Wabco Gmbh Electropneumatic parking brake with directly controlled valves
CN109367528A (en) * 2018-08-28 2019-02-22 南京金龙客车制造有限公司 A kind of automatic parking system and its control method
WO2020138394A1 (en) * 2018-12-28 2020-07-02 ナブテスコオートモーティブ株式会社 Air supply circuit
JP7438979B2 (en) 2018-12-28 2024-02-27 ナブテスコオートモーティブ株式会社 air supply circuit

Also Published As

Publication number Publication date
ITMI20080002U1 (en) 2008-07-13
ES1069013U (en) 2009-01-01
ES1069013Y (en) 2009-04-01
TR200700164U (en) 2008-05-21

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