Provided is a brake apparatus having a detachable pump housing. The brake apparatus having a detachable pump housing includes a master cylinder that receives an operating force of a pedal, a main housing in which the master cylinder is accommodated and a through-hole is formed at one side thereof, a motor that provides a driving force, a pump piston that is accommodated in the main housing, and moves in and out of the main housing through the through-hole by receiving the driving force from the motor, a gear unit that converts the driving force of the motor into a linear motion and transmits the linear motion to the pump piston, and a pump housing in which the pump piston is accommodated and an opening is formed at one side thereof, and that is detachably fastened to the main housing such that the opening communicates with the through-hole.

A tractor includes: a vehicle body; an engine compartment; a driving unit that: is disposed behind the engine compartment, and includes: a brake pedal that includes: a support shaft; and a pedal arm portion; a master cylinder that is operated by the brake pedal and disposed further toward a vehicle-body back side than the support shaft; and a return spring that biases the brake pedal to swing back to a brake off position; and a partition that: is disposed further toward a vehicle-body front side than the brake pedal, and separates the engine compartment and the driving unit from each other, the return spring being engaged to the partition and to the pedal arm portion.

The brake control device comprises a control mode selecting portion 64 which selects one control mode based on a detection result of the detecting portion from a control mode group including at least two control modes which are a responsiveness priority mode which gives more priority to a responsiveness of the braking force relative to an operation of a brake operating member than to a suppression of an operating noise occurred upon the generation of the preparatory hydraulic pressure and a serenity priority mode which gives more priority to the suppression of the operating noise than to the responsiveness of the braking force. The hydraulic pressure control portion controls the hydraulic pressure generating device to generate the preparatory hydraulic pressure in response to the control mode selected by the control mode selecting portion.

A method of controlling an electro-hydraulic brake system comprising a main brake unit and redundancy brake unit, the method comprising: determining a failure type of the main brake unit, the failure type being one of a plurality of failure types comprising: a sensor failure type comprising a failure occurred at a first sensor connected to the main brake unit; an independent wheel control failure type comprising a failure at the main brake unit to perform an independent wheel control; a hydraulic pressure generation failure type comprising a failure at the main brake unit to form a hydraulic pressure; and an inoperable failure type comprising the main brake being not controllable; and in response to determining that the failure type of the main brake unit is the sensor failure type or the independent wheel control failure type, causing the main brake unit to generate a braking force, in response to determining that the failure type of the main brake unit is the hydraulic pressure generation failure type or the inoperable type, causing the redundancy brake unit to generate a braking force.

A pressure medium container for a hydraulic motor vehicle brake system. A pressure medium container is provided including a container casing the interior of which can be filled with a pressure medium via a filler pipe and is closed off by a closure cap fixed to the filler pipe. A sealing element made from an elastomeric material is provided between the filler pipe and a bottom of the closure cap. The sealing element has a valve which rests on a support pedestal arranged on the closure cap is closed in a non-actuated initial state and reaches an opened actuated state under the control of differential pressure, whereby a pressure is equalized between an interior of the pressure medium container and an ambient atmosphere. Direction-dependently, the valve has different valve opening resistances.

A vehicle braking system includes a first wheel cylinder, a second wheel cylinder, a master cylinder including a first master cylinder chamber in fluid communication with the first wheel cylinder via a first circuit and a second master cylinder chamber in fluid communication with the second wheel cylinder via a second circuit, and an electronically controlled pressure generating unit separate from the master cylinder. The vehicle braking system is operable to provide braking in a first configuration in which the electronically controlled pressure generating unit pressurizes fluid, through the master cylinder, in the first circuit, to the first wheel cylinder. In the first configuration, the electronically controlled pressure generating unit pressurizes fluid in the second circuit to the second wheel cylinder, bypassing the master cylinder.

A brake system comprises a first electrohydraulic open-loop and closed-loop control unit. The first electrohydraulic control unit comprises a master brake cylinder actuatable by a brake pedal; a first electrically controllable pressure-providing device; and an electrically controllable pressure-modulating device sets wheel-specific brake pressures for the wheel brakes. The electrically controllable pressure-modulating device has at least one electrically actuatable inlet valve for each wheel brake. A first pressure-medium reservoir for supplying the first electrohydraulic control unit with pressure medium is arranged on the first electrohydraulic control unit. The brake system also comprises a second electrohydraulic open-loop and closed-loop control unit, which comprises a second electrically controllable pressure-providing device for actuating at least some of the wheel brakes and electrically actuatable valves. A second pressure-medium reservoir for supplying the second electrohydraulic control unit with pressure medium is provided, the second pressure-medium reservoir being arranged on the second electrohydraulic control unit.

A brake control device includes a pilot-type pressure-increasing device. A pilot unit of the pressure-increasing device is connected to a power hydraulic pressure generating device via a pilot input passage. A linear control valve that is also used for adjusting a hydraulic pressure of a wheel cylinder is provided on the pilot input passage. A brake ECU checks whether the pressure-increasing device is normally activated or not based on a hydraulic pressure outputted from the pressure-increasing device when the linear control valve is energized for an activation check. Thus, the brake ECU can perform the activation check of the pressure-increasing device without requiring a driver's operation on a brake pedal.

A second electrohydraulic brake control device for a motor vehicle comprises a pressure control valve assembly, an controllable pressure source and a reservoir connection. For a group of wheel brakes, the second electrohydraulic brake control device is connected in series between the associated output pressure connections of a first or main brake control device and the vehicle wheel brakes.

A hydraulic braking system includes: a stroke simulator; a pump configured to suck and discharge working fluid; a hydraulic brake including a brake cylinder connected to the pump; a suction mechanism including a reservoir, a suction portion of the pump, and a suction passage connecting between the reservoir and the suction portion of the pump; a first simulator passage connecting between the stroke simulator and the suction mechanism at a first connecting portion of the suction mechanism; a second simulator passage connecting between the stroke simulator and the suction mechanism in parallel with the first simulator passage at a second connecting portion of the suction mechanism, the second connecting portion being farther from the suction portion of the pump than the first connecting portion; and a flow restricting device provided on the second simulator passage.