WO1995003965A1 - Automatic brake holding system - Google Patents

Automatic brake holding system Download PDF

Info

Publication number
WO1995003965A1
WO1995003965A1 PCT/IT1993/000085 IT9300085W WO9503965A1 WO 1995003965 A1 WO1995003965 A1 WO 1995003965A1 IT 9300085 W IT9300085 W IT 9300085W WO 9503965 A1 WO9503965 A1 WO 9503965A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
circuit
zero
sensor
released
Prior art date
Application number
PCT/IT1993/000085
Other languages
French (fr)
Inventor
Jose Maria Stigliano
Original Assignee
Jose Maria Stigliano
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 Jose Maria Stigliano filed Critical Jose Maria Stigliano
Priority to AU49808/93A priority Critical patent/AU4980893A/en
Priority to PCT/IT1993/000085 priority patent/WO1995003965A1/en
Publication of WO1995003965A1 publication Critical patent/WO1995003965A1/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
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/103—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices
    • B60T11/105—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices with brake locking after actuation, release of the brake by a different control device, e.g. gear lever
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/08—Brake cylinders other than ultimate actuators
    • B60T17/16—Locking of brake cylinders
    • 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

Definitions

  • This invention relates to a system that increases the safety and the driving comfort of wheeled vehicles, eliminating the risk of an unintended displacement of the vehicle after a stop.
  • the system can be applied to any type of wheeled vehicle, being particularly well suited for automobiles, trucks, and industrial vehicles.
  • a system that maintains the brake fully engaged after a stop, and releases it automatically when the accelerator pedal is depressed. It will be appreciated that the brake holding device should not be activated when the vehicle is in motion at any significant speed.
  • a SPEED SENSOR a SIGNAL CONVERTER, a BRAKE SENSOR, an ACCELERATOR SENSOR, a PARK SENSOR, an ELECTROVALVE, and a SWITCHING DEVICE are employed.
  • FIG.l includes a SERVICE SWITCH 8 to permit the eventual disconnection of the entire system, and a BATTERY 9 as a source of electrical power.
  • the SPEED SENSOR 1 supplies an electronic signal when the vehicle is moving, and no signal when the vehicle is still.
  • the SIGNAL CONVERTER 2 interprets the signal and absence of signal from the speed sensor and supplies an appropriate DC voltage.
  • the BRAKE SENSOR 3 closes an electric circuit whenever pressure is applied to the brake hydraulic circuit, and opens the electric circuit when the hydraulic pressure is released.
  • the ACCELERATOR SENSOR 4 closes an electric circuit whenever the accelerator pedal is depressed, and opens the electric circuit when the lever is placed in any other position.
  • the park sensor closes an electric circuit whenever the parking brake (or hand brake) is fully engaged, and opens the circuit when the parking brake is released.
  • the ELECTROVALVE 6 holds the hydraulic pressure in the brake system by closing the return of the hydraulic circuit when the valve is energized, and opens the return of the hydraulic circuit when the valve is no longer energized.
  • the electrovalve is located between the master cylinder and the slave cylinder of the brake pump. If this is not feasible, then in vehicles with dual or multiple brake circuits, an electrovalve is required for each circuit.
  • An indicator lamp on the instrument panel is connected to the electrovalve circuit to indicate when the holding device is on.
  • the SWITCHING DEVICE 7 consists of two single pole-single track relays, one normally open 7a and the other normally closed 7b, connected in series, that command the electrovalve.
  • Solid state relays (SSR) are preferred but electro-magnetic relays (EMR) can also be used.
  • EMR electro-magnetic relays

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

The object of the invention is a system that maintains the brake fully engaged after a stop, and releases it automatically when the accelerator pedal is depressed, that is active only when the speed of the vehicle is zero or closed to zero. When relay (7a) is energized, indicating that the speed of the vehicle is zero or close to zero, and relay (7b) is not energized, the switching device (7) is closed. If the brake pedal is depressed under these conditions, closing the circuit of the brake sensor (3), the electrovalve (5) is energized causing the hydraulic pressure in the brake system to be maintained and thereby the brake to remain engaged. When the accelerator pedal is depressed or the shift lever is placed in the 'park' position or the parking brake is fully engaged, closing the circuit or either the accelerator sensor (4) or the park sensor (5), the circuit of the switching device (7) is open, the electrovalve (6) is released, and the brake is thereby released.

Description

DESCRIPTION Automatic Brake Holding System
Technical Field
This invention relates to a system that increases the safety and the driving comfort of wheeled vehicles, eliminating the risk of an unintended displacement of the vehicle after a stop. The system can be applied to any type of wheeled vehicle, being particularly well suited for automobiles, trucks, and industrial vehicles.
Background Art When driving a car, releasing the brake after a stop would permit a forward or backward displacement of the vehicle, caused by either gravity, if the surface on which the vehicle stands is not perfectly levelled, or by the engine "push" in automatic-transmission vehicles. The prior art, for the purpose of preventing such a displacement, is either to use the hand brake or to keep the foot on the brake pedal for as long as the vehicle is to be in a still state. In automatic- transmission cars, the driver can also place the shift lever in the "park" (P) position. This can be very inconvenient, especially in a congested traffic, where stops are very frequent, and may not be sufficiently safe in that a human driver may forget to engage the hand brake or the parking position, or may inadvertently release the brake pedal.
Disclosure of Invention
According to the present invention, there is provided a system that maintains the brake fully engaged after a stop, and releases it automatically when the accelerator pedal is depressed. It will be appreciated that the brake holding device should not be activated when the vehicle is in motion at any significant speed.
In a preferred implementation of the invention, a SPEED SENSOR, a SIGNAL CONVERTER, a BRAKE SENSOR, an ACCELERATOR SENSOR, a PARK SENSOR, an ELECTROVALVE, and a SWITCHING DEVICE are employed.
For the purpose of illustrating the functioning principle, an embodiment of the invention will now be described in greater detail with reference to FIG.l in the accompanying drawings, which includes a SERVICE SWITCH 8 to permit the eventual disconnection of the entire system, and a BATTERY 9 as a source of electrical power.
The SPEED SENSOR 1 supplies an electronic signal when the vehicle is moving, and no signal when the vehicle is still.
The SIGNAL CONVERTER 2 interprets the signal and absence of signal from the speed sensor and supplies an appropriate DC voltage.
The BRAKE SENSOR 3 closes an electric circuit whenever pressure is applied to the brake hydraulic circuit, and opens the electric circuit when the hydraulic pressure is released.
The ACCELERATOR SENSOR 4 closes an electric circuit whenever the accelerator pedal is depressed, and opens the electric circuit when the lever is placed in any other position. Alternatively, the park sensor closes an electric circuit whenever the parking brake (or hand brake) is fully engaged, and opens the circuit when the parking brake is released.
The ELECTROVALVE 6 holds the hydraulic pressure in the brake system by closing the return of the hydraulic circuit when the valve is energized, and opens the return of the hydraulic circuit when the valve is no longer energized. Ideally, the electrovalve is located between the master cylinder and the slave cylinder of the brake pump. If this is not feasible, then in vehicles with dual or multiple brake circuits, an electrovalve is required for each circuit. An indicator lamp on the instrument panel is connected to the electrovalve circuit to indicate when the holding device is on.
The SWITCHING DEVICE 7 consists of two single pole-single track relays, one normally open 7a and the other normally closed 7b, connected in series, that command the electrovalve. Solid state relays (SSR) are preferred but electro-magnetic relays (EMR) can also be used. The switching device commands the brake holding device as follows:
a) When the speed of the vehicle is close to zero, the signal converter connected to the speed sensor energizes the relay 7a of the switching device, and the circuit connecting the brake holding device to the power supply is closed. In this condition, if the brake pedal is depressed, pressurizing the hydraulic circuit, and causing the electric circuit of the brake sensor 3 to be closed, the electrovalve 6, connected in series with the brake sensor, is energized, closing the return of the hydraulic circuit, thereby maintaining the brake engaged .
b) If the accelerator pedal is depressed, causing the circuit of the accelerator sensor 4 to be closed,
95 or if the shift lever is placed in the "park" position or the parking brake is fully engaged, causing the circuit of the park sensor 5 to be closed, the relay 7b is energized and the circuit connecting the electrovalve 6 to the power supply is open, releasing
100 both the electrovalve and the brake.

Claims

Claims
1. A braking system for wheeled vehicles in which depressing the brake pedal when the speed of the vehicle is zero or close to zero causes the brake to remain engaged after the brake pedal is released.
2. A braking system as claimed in claim 1 in which depressing the accelerator pedal, when the braking system has remained engaged after the brake pedal has been released, causes the brake to be released.
3. A braking system as claimed in claim 1 or claim 2 in which placing the shift lever in the " park" position, or engaging the parking brake fully, when the braking system has remained engaged after the brake pedal has been released, causes the brake to be released.
PCT/IT1993/000085 1993-07-30 1993-07-30 Automatic brake holding system WO1995003965A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU49808/93A AU4980893A (en) 1993-07-30 1993-07-30 Automatic brake holding system
PCT/IT1993/000085 WO1995003965A1 (en) 1993-07-30 1993-07-30 Automatic brake holding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT1993/000085 WO1995003965A1 (en) 1993-07-30 1993-07-30 Automatic brake holding system

Publications (1)

Publication Number Publication Date
WO1995003965A1 true WO1995003965A1 (en) 1995-02-09

Family

ID=11331938

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1993/000085 WO1995003965A1 (en) 1993-07-30 1993-07-30 Automatic brake holding system

Country Status (2)

Country Link
AU (1) AU4980893A (en)
WO (1) WO1995003965A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2813836A1 (en) * 2000-09-13 2002-03-15 Renault BRAKING CONTROL METHOD AND DEVICE
CN106043255A (en) * 2016-08-12 2016-10-26 安徽工程大学机电学院 Remedy system for mistaken accelerator pedal stepping of car
CN107000711A (en) * 2014-12-04 2017-08-01 三菱自动车工业株式会社 Electric parking and braking equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305325A1 (en) * 1975-03-27 1976-10-22 Goshi Kaisha Mizuno Kogeisha CONTROL DEVICE FOR BRAKING SYSTEM OF A VEHICLE
DE3200819A1 (en) * 1982-01-11 1983-07-21 Klaus Dipl Ing Wiemer Device for simplifying the braking process of stationary motor vehicles
DE3502256A1 (en) * 1985-01-24 1986-02-06 Daimler Benz Ag Parking device on the service brake of a motor vehicle
FR2573018A1 (en) * 1984-11-14 1986-05-16 Kia Motors Corp AUTOMATIC CONTROL CIRCUIT FOR BRAKE CONTROL DEVICES
DE3704018A1 (en) * 1987-02-10 1988-08-18 Porsche Ag Brake device
JPH048653A (en) * 1990-04-25 1992-01-13 Akebono Brake Ind Co Ltd Safety device for brake
EP0589253A1 (en) * 1992-09-04 1994-03-30 Giovanni Strazzabosco Automatic device for the temporary parking of motor vehicles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2305325A1 (en) * 1975-03-27 1976-10-22 Goshi Kaisha Mizuno Kogeisha CONTROL DEVICE FOR BRAKING SYSTEM OF A VEHICLE
DE3200819A1 (en) * 1982-01-11 1983-07-21 Klaus Dipl Ing Wiemer Device for simplifying the braking process of stationary motor vehicles
FR2573018A1 (en) * 1984-11-14 1986-05-16 Kia Motors Corp AUTOMATIC CONTROL CIRCUIT FOR BRAKE CONTROL DEVICES
DE3502256A1 (en) * 1985-01-24 1986-02-06 Daimler Benz Ag Parking device on the service brake of a motor vehicle
DE3704018A1 (en) * 1987-02-10 1988-08-18 Porsche Ag Brake device
JPH048653A (en) * 1990-04-25 1992-01-13 Akebono Brake Ind Co Ltd Safety device for brake
EP0589253A1 (en) * 1992-09-04 1994-03-30 Giovanni Strazzabosco Automatic device for the temporary parking of motor vehicles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 16, no. 157 (M - 1236) 16 April 1992 (1992-04-16) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2813836A1 (en) * 2000-09-13 2002-03-15 Renault BRAKING CONTROL METHOD AND DEVICE
EP1188631A1 (en) * 2000-09-13 2002-03-20 Renault Method and device for controlling the braking
CN107000711A (en) * 2014-12-04 2017-08-01 三菱自动车工业株式会社 Electric parking and braking equipment
EP3228509A4 (en) * 2014-12-04 2018-06-13 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Electric parking brake device
CN106043255A (en) * 2016-08-12 2016-10-26 安徽工程大学机电学院 Remedy system for mistaken accelerator pedal stepping of car

Also Published As

Publication number Publication date
AU4980893A (en) 1995-02-28

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