Interrelated power delivery controls – including engine control – Brake control – Brake control having holding device – with means on engine...
Patent
1998-04-27
2000-07-11
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Brake control
Brake control having holding device, with means on engine...
477195, 477198, 303191, B60T 712
Patent
active
060865156
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method of retaining a vehicle on an inclined roadway and when starting uphill, wherein the brake force on individual or on several vehicle wheels, in particular, on the wheels of one axle is generated, namely maintained, increased and decreased again, in consideration of the vehicle speed, the brake pedal application, or corresponding criteria. Arrangements for implementing the method are also covered by the present invention.
Inadvertent rolling of a vehicle on an inclined roadway is prevented, and starting uphill is facilitated, even for an unskilled person, by such retaining aids or retaining systems, which are referred to as `hill holders`. Retaining systems of this type enhance the comfort and prevent crashes caused by inattentiveness, clutch damages due to operator errors, etc.
German patent No. 34 39 067 discloses an arrangement for arresting a pressure-fluid-operated wheel brake wherein components of the brake system, which are per se provided for anti-lock control, are used to retain the vehicle. When the brake pedal is released, the braking pressure in this prior art arrangement is reduced only to a predetermined residual pressure which is sufficient to retain the vehicle. To release the wheel brake, a multi-way valve inserted into the pressure fluid path is switched to open on command of a signal issued by the driver or responsive to the driving behavior of the vehicle or the rotational behavior of the wheels.
German patent application No. 40 23 705 describes an arrangement for retaining a vehicle when starting uphill which has an electrically operable actuator that acts by way of a linkage or a Bowden cable on the parking brake of the vehicle. The associated electronics for controlling the actuator is provided with input signals of wheel sensors and switches coupled to the accelerator pedal, the transmission, the clutch, etc.
An object of the present invention is to provide a method which makes it easier to the driver to retain the vehicle and start uphill in various situations. As the situation may be, the method shall intervene in the brake system in the suitable fashion.
SUMMARY OF THE INVENTION
It has been found that this object can be achieved by providing that the brake force is maintained or kept constant, increased or decreased in response to the respective situation, or in adapting to the respective circumstances. The following input data are acquired and evaluated as a criterion for the respective situation and the driver's wish: ignition,
The driver's wish is concluded from logically combining and evaluating the input signals, and the pressure is modulated in a suitable manner. The retaining system is deactivated when a vehicle speed threshold is exceeded or when an on/off switch is activated.
For safety considerations, a warning signal is triggered by a door contact as soon as the driver's door is opened, with the retaining system activated, according to a preferred aspect of the present invention. Also, it is an advantage to provide a seat contact instead of, or in addition to, the door contact. When the retaining system is activated, the seat contact triggers a warning signal as soon as the driver's seat is relieved from load.
An arrangement for implementing the method of the present invention includes that the arrangement is provided in the shape of or as a component of a hydraulic brake system, more particularly as a component of a brake system equipped with a traction slip control system, and that pressure is introduced and modulated in the wheel brakes to generate and control the brake force.
Further features, advantages and details of the present invention can be taken from the following description, making reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings,
FIG. 1 is a schematic view of the basic components of an arrangement for implementing the method of the present invention on the basis of a brake system with anti-lock and traction slip control.
FIG. 2 is a table s
REFERENCES:
patent: 4867291 (1989-09-01), Holman et al.
patent: 5137127 (1992-08-01), Braun
patent: 5791750 (1998-08-01), Spiegelberg
Buschmann Gunther
Haupt Karlheinz
Kuzel Thomas
ITT Manufacturing Enterprises Inc.
Ta Khoi Q.
LandOfFree
Process and system for retaining a vehicle on an inclined roadwa does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and system for retaining a vehicle on an inclined roadwa, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and system for retaining a vehicle on an inclined roadwa will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-536807