Abstract: To govern or control the distribution of brake force, first a switch-over to maintaining the brake force or the braking pressure on the rear wheels constant will be performed upon the commencement and/or detection of a braking operation. From the initial vehicle deceleration upon commencement of the braking operation, a vehicle reference quantity is derived by measuring the rotational behavior of the rear wheels, by filtering the measured values and by extrapolation, whereupon the current rotational behavior of the rear wheels is compared with this reference quantity. Preferably, three cases are distinguished in the analysis of the rotational behavior of the rear wheels and thereafter, depending on the result of the analysis, the braking pressure is kept constant or braking pressure increase in the rear-wheel brakes is allowed.

Abstract: A method for distributing the braking force between the front and rear axles, pressure is built up and released alternately at the rear axle brakes, so that, on average, a saturation pressure is reached which is below the primary pressure specified by the driver. This method is suitable especially for brake systems without pressure reducers for the rear wheel brakes, when, in the absence of input information, the electronic distribution of the braking force is no longer possible.

Abstract: A vehicle braking pressure source device including (a) a master cylinder having a pressurizing piston cooperating with a cylinder housing to define a pressurizing chamber and a back-pressure chamber on front and rear sides of the piston, and an input rod which slidably extending through a rear end wall of the cylinder housing such that the piston is advanced by a brake operating force of a brake operating member transmitted thereto through the input rod, to pressurize a working fluid in the pressurizing chamber, (b) a communication passage for communication between the pressurizing and back-pressure chambers, (c) a control valve device disposed in the communication passage for controlling the communication between the pressurizing and back-pressure chambers through the communication passage, and (d) a control valve control device for controlling the control valve device, on the basis of at least one of an operating state of the brake operating member, a running state of the vehicle and a state of a road surfa

Abstract: A system and method for initiating a braking force distribution control are disclosed. In one embodiment the deceleration of a front wheel and rear wheel are determined. When the front wheel deceleration is less than the rear wheel deceleration, the braking force distribution control is initiated.

Abstract: A method and device for estimating pressure changes within a hydraulic system having a first reservoir and at least one second reservoir connected to the first reservoir via valves, including the following steps: (a) specifying a pressure differential between the first and second reservoirs; (b) calculating a volume exchanged within a specified time interval between the first and second reservoirs via the valve, on the basis of a value for the pressure differential that is valid at the start of the time interval; (c) calculating a volume to be exchanged between the two reservoirs to achieve equal pressures in them; (d) if the amount of the exchanged volume calculated in step (b) is greater than the volume to be exchanged as calculated in step (c), replacing the value of the exchanged volume with that of the volume to be exchanged; and (e) adopting the volume value obtained in step (d) as the change in the volume in the second reservoir and determining the pressure change in the reservoirs on the basis of

Abstract: A motorcycle chassis embodies novel techniques, geometries, and configurations to provide enhanced performance, including new techniques to enhance braking performance. A first feature facilitates the application of braking force to each wheel in proportion to its traction capability. Maximum deceleration rates are provided prior to wheel lockup. A second feature applies liquid cooling to a brake disk. Liquid cooling eliminates brake fade caused by overheating of the brake pad material. Aerodynamic control features in concert with unique component arrangement better protect the rider from wind forces and also reduce aerodynamic drag. Narrow steering bars enclosed by bodywork and deep leg notches in the fairing contour largely remove rider induced air flow trips. The leg notches serve to brace the rider during deceleration, unloading his wrists from much of the braking force. An exhaust system routed over the engine permits a totally smooth body undercarriage to reduce aerodynamic drag.

Abstract: A brake pressure control device for a vehicle includes a master cylinder, a front wheel brake connected to the master cylinder through a front brake conduit, a rear wheel brake connected to the master cylinder through a rear brake conduit, a front reservoir connected to the front wheel brake and a rear reservoir connected to the rear wheel brake. A front control valve selectively connects the front wheel brake to one of the master cylinder and the front reservoir, and a rear control valve selectively connects the rear wheel brake to one of the master cylinder and the rear reservoir. A front fluid pump discharges brake fluid to the master cylinder from the front reservoir, while a rear fluid pump discharges brake fluid to the master cylinder from the rear reservoir.

Abstract: The present invention relates to an electronically controlled brake force distributor for automotive vehicles, which includes a pedal-operated braking pressure generator (1) to which wheel brakes (HL, VR, HR, HL) are connected by way of pressure fluid lines. At least one valve (10) is inserted into the pressure fluid lines and positioned in the pressure fluid conduit to the rear-wheel brakes. An actuator (5) is provided to actuate the valve (10) and, as a function of the vehicle deceleration, switches the valve (10) from a first into a second position in which the valve (10) is switched from its open initial position to a position separating the rear-wheel brake (HR; HL) hydraulically from the braking pressure generator (1). In this separating position, the rear-wheel brake (HR; HL) is hydraulically connected exclusively to an accumulator chamber (6) associated with the actuator (5).

Abstract: In a brake apparatus provided with an actuator for controlling brake fluid pressure applied to a wheel cylinder, a non-return valve disposed in a conduit connected to a master cylinder so as to allow brake fluid to flow toward the master cylinder. The non-return valve includes a ball serving as a valve body which seats on a valve seat formed between a small diameter portion and a large diameter portion in the conduit. After the ball is installed in the large diameter portion of the conduit, an opening part of the large diameter portion is closed by a lid while limiting a movement range of the ball so that a center of the ball does not reach an axis of a conduit perpendicularly connected to the large diameter portion.

Abstract: The present invention is directed to a brake control system for a vehicle, wherein a first valve device for opening or closing a main passage, which communicates a master cylinder with wheel brake cylinders, a hydraulic pressure pump for supplying the hydraulic pressure to the main passage, and a second valve device for opening or closing an auxiliary passage, which communicates the inlet of the pressure pump with the master cylinder, are disposed in each hydraulic pressure circuit of a dual hydraulic pressure circuit system.

Abstract: A method of electronic brake force distribution is applied to contribute to vehicle stability even in the event of failure of the system that detects failure of the front-axle brake circuit (13) in a vehicle (1). The method involves initiating a pressure maintenance or pressure reduction phase only after the standards with respect to a minimum vehicle deceleration upon brake circuit failure are met. This way, it is ensured that the standards are observed, on the one hand, and locking of the rear wheels (6,7) before the front wheels (4,5) is prevented with great likelihood, on the other hand. Thus, electronic brake force distribution (EBD) is switched over to less sensitive criteria. This makes allowance for both possibilities in the event of a failure of a pressure switch (15), i.e., that the front-axle brake circuit (13) is intact or that it is defective.

Abstract: A hydraulic brake system with electronic anti-lock control contains, as essential components, a pedal actuated brake pressure transducer (1), electrically actuated inlet and outlet valves (EV1 to EV4, AV1 to AV4), wheel sensors (S1 to S4) and an electronic control circuit (6). The brake pressure transducer (1) is equipped with one or more path sensors (5), for the direct or indirect determination of the pedal path (S). Interdependent with the current driving conditions, the brake situation and the pedal path (S), the anti-lock control is switched from a standard control mode into a safety control mode, which essentially permits only a brake pressure increase in the front wheels and a brake pressure decrease in the rear wheels during an anti-lock control procedure. A limit value (SpGrenz) of the pedal advancement is determined interdependent with the driving conditions and the brake situation, and upon exceeding such a switch over takes place into the safety control mode.