Abstract:
A tilted vane brake rotor. The tilted vanes are tilted in the sense of being oriented with respect to the inside disc surfaces at other than 90 degrees, defined by an acute intersection angle with respect to either of the inside disc surfaces. The tilted vanes may be, for example, paired and oriented serially around the circumference of the rotor discs so as to provide a series of vane pairs in the form of: a series of alternately inverted V-shapes, a series of same oriented V-shapes, or a series of X-shapes.
Abstract:
An exemplary embodiment includes an automotive brake component, such as a brake drum or a brake rotor, and an inlay coupled to the automotive brake component. The inlay constituting at least a portion of a braking surface that is acted upon during a braking event. The inlay damping vibrations in the automotive brake component when the component is vibrated.
Abstract:
An exemplary embodiment includes an automotive brake component, such as a brake drum or a brake rotor, and an inlay coupled to the automotive brake component. The inlay constituting at least a portion of a braking surface that is acted upon during a braking event. The inlay damping vibrations in the automotive brake component when the component is vibrated.
Abstract:
A system and method for controlling creep torque in a vehicle with an electric powertrain, like a hybrid electric vehicle (HEV). The method uses a combination of driver braking intent and other vehicle conditions, such as vehicle speed, to determine when creep torque is not needed and to reduce and/or cancel it accordingly. By reducing and/or cancelling the creep torque during periods where energy is being unnecessarily expended by the electric powertrain in order to work against the brakes, the present method is able to improve the overall efficiency of the vehicle.
Abstract:
A vehicle brake system and method that are designed to improve the driver braking experience by compensating for the effects that humidity and temperature can have on brake performance. According to one embodiment, the method determines if a braking event is underway and, if so, it measures humidity and brake temperature. With this information, the method is able to compensate for anticipated changes in the coefficient of friction (n) of one or more brake components, such as brake pads or rotors, and to provide a modified brake command signal accordingly.
Abstract:
Methods, systems, and vehicles are provided for calibrating a braking system of a vehicle. The braking system has an electric motor, a pump, and a hydraulic accumulator. A speed of the vehicle is obtained, and a pressure within the hydraulic accumulator is measured. The pump is operated via an electric motor to provide hydraulic pressure to the hydraulic accumulator based on the speed of the vehicle and the measure of pressure of the hydraulic accumulator.
Abstract:
A method that compensates for temperature-related effects in a vehicle brake system. According to one embodiment, the method determines the temperature of a brake pad, calculates a temperature-based modifier, and then uses the temperature-based modifier to adjust one or more brake command signals provided to the vehicle brake system so that they are compensated for temperature-related changes in the coefficient of friction (μ) of the brake pad and rotor. The method may be used with brake-by-wire systems such as electrohydraulic braking (EHB) systems and electromechanical braking (EMB) systems.
Abstract:
An exemplary embodiment of a brake caliper has a housing with a first chamber and a second chamber. The brake caliper also has a first piston that moves in response to fluid pressure in the first chamber and has a second piston that moves in response to fluid pressure in the second chamber. A brake pad has a leading end portion that is acted upon by the first piston and has a trailing end portion that is acted upon by the second piston. A fluid passage leads to the first chamber. The trailing end portion contacts an associated rotor before the leading end portion contacts the rotor.
Abstract:
A brake rotor providing reduced brake pad radial taper wear by providing brake rotor friction surface indent patterns. For example, the indent patterns are the form of radial-biased grooves or linearly arranged cross-drill hole sets, patterned in a configuration that balances brake pad wear, thereby reducing brake pad radial taper wear in a manner tuned specifically for a given type of brake caliper and brake pad material, wherein the reduction in brake pad radial taper wear is accomplished with virtually no penalty to brake pad life.