A method for controlling vehicle braking of a wheel rotor having a brake pad associated therewith includes moving a piston into engagement with the brake pad by applying hydraulic pressure to the piston. The piston is locked in place against the brake pad with a parking brake. The hydraulic pressure is removed from the piston while the parking brake is locked.

To obtain a hydraulic pressure control unit and a straddle-type vehicle brake system, each of which can answer a request for downsizing. The straddle-type vehicle brake system has a hydraulic circuit that includes: a primary channel through which brake fluid in a master cylinder is delivered to a wheel cylinder; a secondary channel through which the brake fluid in the wheel cylinder is released to a primary channel intermediate portion; and a supply channel that supplies the brake fluid to a secondary channel intermediate portion. In a state where a surface on which a motor 28 of a base body 51 in the hydraulic pressure control unit is vertically provided is seen from the front, an opening for a first valve 31 that controls a flow rate on the wheel cylinder side of the primary channel intermediate portion and an opening for a second valve 32 that controls a flow rate on an upstream side of the secondary channel intermediate portion overlap a first straight line L1, and an opening for a third valve 35 that controls a flow rate on the master cylinder side of the primary channel intermediate portion and an opening for a fourth valve 36 that controls a flow rate of the supply channel overlap a second straight line L2 that crosses the first straight line L1 at a right angle.

In a brake device for a saddle-type vehicle, including hydraulic front and rear wheel brakes and a first control unit that controls operations of the front wheel brake and the rear wheel brake, a second control unit includes a collision possibility determining section that determines a possibility of collision of an own vehicle with an obstacle ahead, the first control unit has an automatic brake controller that performs automatic brake control to automatically increase braking forces of the front wheel brake and the rear wheel brake, and in case where the collision possibility determining section determines that there is the possibility of collision, the automatic brake controller pressurizes the rear wheel brake to brake a rear wheel, and simultaneously pressurizes the front wheel brake up to a predetermined pressure at which a vehicle body posture is not changed by braking of a front wheel.

Methods and systems are provided for a vehicle towing a trailer. In an embodiments, a method includes: storing, in a data storage device, target deceleration values associated with the vehicle not towing the trailer; when the vehicle towing the trailer is determined to be braking, determining, by a processor, that a target deceleration value of the target deceleration values is not met, adjusting a brake sensitivity value associated with trailer braking based on the target deceleration value; and controlling deceleration of the towing vehicle based on the brake sensitivity value.

Systems and methods use cameras to provide autonomous navigation features. In one implementation, a method for navigating a user vehicle may include acquiring, using at least one image capture device, a plurality of images of an area in a vicinity of the user vehicle; determining from the plurality of images a first lane constraint on a first side of the user vehicle and a second lane constraint on a second side of the user vehicle opposite to the first side of the user vehicle; enabling the user vehicle to pass a target vehicle if the target vehicle is determined to be in a lane different from the lane in which the user vehicle is traveling; and causing the user vehicle to abort the pass before completion of the pass, if the target vehicle is determined to be entering the lane in which the user vehicle is traveling.

Systems and methods use cameras to provide autonomous navigation features. In one implementation, a method for navigating a user vehicle may include acquiring, using at least one image capture device, a plurality of images of an area in a vicinity of the user vehicle; determining from the plurality of images a first lane constraint on a first side of the user vehicle and a second lane constraint on a second side of the user vehicle opposite to the first side of the user vehicle; enabling the user vehicle to pass a target vehicle if the target vehicle is determined to be in a lane different from the lane in which the user vehicle is traveling; and causing the user vehicle to abort the pass before completion of the pass, if the target vehicle is determined to be entering the lane in which the user vehicle is traveling.

A method and a device for determining braking-related actual values of a train assembly including multiple carriages for carrying out a deceleration-controlled braking of the train assembly, in which the longitudinal deceleration and the longitudinal slope are considered to be actual values, from which an adjustment value balancing the control deviation is determined for a control element of the brake by a deceleration controller/deceleration force controller according to a predefined setpoint value of a desired braking deceleration.

An axle for utility vehicles includes a first wheel end and a second wheel end arranged opposite each other and rotatably on the axle, a recovery device connected to the first wheel end configured to recover rotational energy of the first wheel end, a braking device configured to decelerate the second wheel end, and a control unit configured to determine information on a deceleration of the first wheel end which results from the recovery and/or a deceleration of the second wheel end, and to control the braking device and/or the recovery device such that the deceleration of the first wheel end and the deceleration of the second wheel end are matched to each other, wherein the control unit is configured to determine the information on the deceleration of the first wheel end based on the recovered rotational energy.

A vehicle braking system (20) has a primary braking unit (22) with a first pressure generating unit (34) and a first reservoir (26). The vehicle braking system (20) further has a secondary braking unit (24) with a second pressure generating unit (52) and second reservoir (70). A method of operating the vehicle braking system (20) includes actuating the pressure generating unit (34) of the primary braking unit (22) thereby pressurizing a fluid at a wheel cylinder (30) to slow or stop the vehicle. The wheel cylinder (30) is depressurized in response to an electrical signal provided to an electronic control unit (100,102). The fluid is transferred from the wheel cylinder (30) to the second reservoir (70). The fluid path (PI) between the wheel cylinder (30) and the second reservoir (70) is shorter and has less fluid resistance than the fluid path (P2) between the wheel cylinder (30) and the first reservoir (26). The present invention further comprises two braking systems. The present inventions are intended for fast pressure depressurization at quick start or launch control.

A control device for a first motorized pressure build-up device of a braking system of a vehicle. The control device is designed to output at least one first piece of information to an activation device of a second motorized pressure build-up device of the braking system by, under consideration of the respective first piece of information, a first motor activatable in such a way that a pressure prevailing in at least one partial volume of the braking system is varied in accordance with a pressure change signal, which is interpretable as the respective first piece of information for the activation device using a second pressure sensor unit of the second motorized pressure build-up device.