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Patent EP0173054A2 successfully refreshed from Google Patents.
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EP0173054A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Vehicular hill holder system

Assignee: Honeywell International Inc
•
Filing: 1985-07-16
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Granted: —
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Expires: 2005-07-16
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Abstract

Abstract A brake booster (10, 210, 310) connected to a control circuit (120) provides a system for the continued braking of a vehicle when the vehicle is situated on an incline and the brake pedal (92) is released by the operator. Continued brake application is accomplished by utilizing a control circuit (120) responsive to vehicular attitude, clutch pedal position, ignition status, vehicular speed, and vehicular direction. The control circuit (120) is connected to the combination of a check valve and three-way solenoid valve (100, 200, 300) connected to a movable wall brake booster (10, 210, 310). The combination valve (100) is connected to a flexible hose (110) disposed interiorily of the booster (10), the other end of the flexible hose (110) connected to the input opening (32) of a three-way poppet valve (70) located at the central hub (30) of the booster (10). When the control circuit (120) senses that the vehicle is on an incline, the clutch pedal depressed, the ignition "on", the speed is zero, and the vehicle not backing up, it actuates the three-way solenoid of valve (100) which continues to supply a first fluid pressure to the front booster chamber (40) while supplying a second fluid pressure for the rear booster chamber (50) via the flexible hose (110) and poppet valve (70). The vehicle operator may release the brake pedal (92) which returns slightly toward an inactive position and which opens slightly valve (70), with the brakes remaining activated because the second fluid pressure is provided to the rear chamber (50) via the hose connection (110) and valve (70) to maintain the axially displaced position of the movable wall (24).

Inventors

  • 👤 Keith Harold Fulmer
  • 👤 Arthur Kenton Peebles
  • 👤 Hugh Dennis Steininger

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 22:28
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/103; B60T7/00; B60T7/12; B60T7/122; B60W; B60W10/00; B60W10/18; B60W2510/00; B60W2510/02; B60W2510/0208; B60W2510/0225; B60W2520/00; B60W2520/06; B60W2520/10; B60W2520/16; Y; Y10; Y10S; Y10S188/00; Y10S188/02

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 213 words
A braking assistance servo-motor system for a vehicle, comprising a brake booster (10, 210, 310) having a first chamber (40, 240, 340), a working chamber (50, 250, 350), first valve means (70, 270, 370) responsive to a vehicle brake pedal, and output means (18, 218, 318) for operatively actuating brakes of the vehicle, characterized in that said system is operable to maintain the braking of the vehicle when the brake pedal is released toward an inactive braking position and includes second valve means (100, 200, 300) operatively connected with the booster (10, 210, 310), and control circuit means (120) for sensing vehicular parameters and operatively connected to said second valve means (100, 200, 300), said brake booster (10, 210, 310) operating responsively to said brake pedal by utilizing a pressure differential between the chambers (40, 240, 340; 50, 250, 350) to displace the output means (18, 218, 318) and actuate the brakes, the control circuit means (120) sensing the parameters of vehicular attitude, clutch position, and vehicular speed to actuate responsively thereto the second valve means (100, 200, 300) and provide fluid pressure to said brake booster (10, 210, 310) and maintain the displacement of the output means (18, 218, 318) and actuation of the brakes after the brake pedal has been released.
Claim 2
Dependent Claim 213 words
A braking assistance servo-motor system for a vehicle, comprising a brake booster (10, 210, 310) having a first chamber (40, 240, 340), a working chamber (50, 250, 350), first valve means (70, 270, 370) responsive to a vehicle brake pedal, and output means (18, 218, 318) for operatively actuating brakes of the vehicle, characterized in that said system is operable to maintain the braking of the vehicle when the brake pedal is released toward an inactive braking position and includes second valve means (100, 200, 300) operatively connected with the booster (10, 210, 310), and control circuit means (120) for sensing vehicular parameters and operatively connected to said second valve means (100, 200, 300), said brake booster (10, 210, 310) operating responsively to said brake pedal by utilizing a pressure differential between the chambers (40, 240, 340; 50, 250, 350) to displace the output means (18, 218, 318) and actuate the brakes, the control circuit means (120) sensing the parameters of vehicular attitude, clutch position, and vehicular speed to actuate responsively thereto the second valve means (100, 200, 300) and provide fluid pressure to said brake booster (10, 210, 310) and maintain the displacement of the output means (18, 218, 318) and actuation of the brakes after the brake pedal has been released.
Claim 3
Dependent Claim 53 words
The system in accordance with claim 1, characterized in that the system comprises an inflatable device (208) disposed in the working chamber (250) and in communication with said second valve means (200), said inflatable device (208) receiving the fluid pressure to be inflated thereby and operatively maintain displacement of the output means (218).
Claim 4
Dependent Claim 61 words
The system in accordance with claim 1, characterized in that the system comprises communication means (110, 410) for connecting said second valve means (100, 300) with said first valve means (170, 370), said communication means receiving said fluid pressure and transmitting the fluid pressure to the first valve means ( 70, 370) for communication with the working chamber ( 50, 350).
Claim 5
Dependent Claim 25 words
The system in accordance with claim 3, characterized in that the communication means (110) comprises a flexible conduit (110) disposed interiorily of the booster (10).
Claim 6
Dependent Claim 23 words
The system in accordance with claim 3, characterized in that the communication means (410) comprises a bellows (410) disposed within said booster (310).
Claim 7
Dependent Claim 29 words
The system in accordance with claim 1, characterized in that said second valve means (100, 200, 300) continuously provides lower fluid pressure to said first chamber (40, 240, 340).

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