524results about "Brake system interactions" patented technology

A driving dynamics system for a vehicle may include a primary control unit for detecting and / or generating steering commands and braking commands; a brake system having first and second electrohydraulic pressure supply units; four hydraulically actuable wheel brakes of respective wheels; electrically actuable brake pressure adjustment valves; and an electric steering actuator for actuating at least one axle. The driving dynamics system may implement a steering command during normal operation to actuate at least one of the pressure supply units and the steering actuator and / or, to implement a braking command during normal operation, to actuate at least the second pressure supply unit and at least the brake pressure adjustment valves for a wheel-specific pressure adjustment and, in a fault case, to actuate at least the first pressure supply unit and at least the brake pressure adjustment valves for a wheel-specific pressure adjustment.

The vehicle control device of the present invention acquires characteristics of a road condition in front of a traveling vehicle based on external information; acquires vehicle behavior control variables for controlling the behavior of the vehicle based on estimated state variables of the vehicle that are obtained based on the characteristics, and control variables concerning speed of the vehicle based on the external information; acquires trajectory tracking control variables for causing the vehicle to track the target trajectory based on the target trajectory on which the vehicle travels that are obtained based on the characteristics and the estimated state variables; and outputs the control commands for controlling the suspension device, steering device, and braking and driving device based on the vehicle behavior control variables and the trajectory tracking control variables. This improves travel stability of the vehicle on a road surface on which an irregularity such as ruts exists.

A vehicle (22) being operable in an autonomous driving mode having a parking brake (17) with a first actuation unit (9) configured to apply or release the parking brake (17); an activation device (10) configured to activate or deactivate the autonomous driving mode; an interlock (11), wherein the interlock (11) is configured to prevent an activation of the autonomous driving mode unless the parking brake (17) is applied by the first actuation unit (9).

A terrain distance control system for automated vehicles is disclosed, in which the operation of at least one transmission and / or braking system(s) can be controlled in response to a generated distance request to achieve an identified driving distance and to fulfill a command for maximum force or maximum thrust. During the vehicle's travel, a measured distance can be accumulated such that the measured distance increases when the vehicle travels in a first direction and decreases when the vehicle travels in a second direction. The system can automatically determine a distance to be traveled relative to the measured distance before issuing commands to actuate a brake actuator and / or a transmission actuator to decelerate and / or stop the vehicle.The system can also evaluate whether the measured distance at the location where the vehicle actually stopped falls within the distance tolerance of the distance request. The measured distance can be reset when the system is switched on or off.

A method is for improving a vehicle-dynamics-related stability of a utility vehicle, wherein the utility vehicle has a lift axle. The method includes: determining a current ground speed of the utility vehicle; determining a stability-critical speed of the utility vehicle; comparing the current ground speed with the stability-critical speed; determining a lift status of the lift axle of the utility vehicle; and lowering the lift axle of the utility vehicle if the lift status represents a raised lift axle and the current ground speed is greater than or equal to the stability-critical speed. A device is for improving a vehicle-dynamics-related stability of a utility vehicle.

An electromechanical brake system (10) includes a first energy supply apparatus (20) and a second energy supply apparatus (21), a first system control device (30) and a second system control device (31), a plurality of electromechanical brake actuator devices (41), and a first plurality and a second plurality of electronic brake control systems (40a, 40b). Each of the electronic brake control systems is set up to control one of the electromechanical brake actuator devices. The first energy supply apparatus is connected to the first system control device and to each of the first electronic brake control systems, and the second energy supply apparatus is connected to the second system control device and to each of the second electronic brake control systems. A further control device (32, 47) may be connected to at least one of the first electronic brake control systems or one of the second electronic brake control systems.

An object of the present invention is to provide a vehicle control device capable of avoiding the collision with an obstacle by performing an appropriate collision assessment and appropriate driving assistance having considered a detection error of the obstacle. The vehicle control device 100 includes a collision assessment unit 3 which assesses whether or not there is a possibility of an ego vehicle and an obstacle colliding with each other, and a driving assistance control unit 4 which performs driving assistance for avoiding the collision. The collision assessment unit 3 includes a region setting unit 31 which sets an ego vehicle region and an obstacle region, a location prediction unit 33 which predicts future locations of the ego vehicle region and the obstacle region, and an overlap assessment unit 34 which assesses that there is a possibility of collision when the ego vehicle region and the obstacle region overlap at the future location. The region setting unit 31 changes, on the basis of a moving speed of the obstacle, the size of the ego vehicle region and / or the obstacle region from the size of the ego vehicle and / or the obstacle, to thereby set the ego vehicle region and the obstacle region.

Provided are a method and system for auxiliary emergency braking after a braking failure, and an electronic device, a computer-readable storage medium, a computer program product and a computer program. The method comprises: obtaining a braking system failure factor parameter numerical value on the basis of a braking system health state observer or a fault diagnosis module of a current vehicle; constructing a braking risk decision function on the basis of a braking system failure factor and related data of the current vehicle to calculate a current braking risk value, and obtaining a desired lateral displacement of the current vehicle on the basis of the current braking risk value and steering system data; constructing an integral heuristic barrier Lyapunov function on the basis of the desired lateral displacement of the vehicle and vehicle state information after decision making, and obtaining a desired vehicle traveling yaw angle on the basis of a calculation result of the function; and converting the desired vehicle traveling yaw angle into an input front wheel steering angle value of the current vehicle, and converting the input front wheel steering angle value of the current vehicle into steering-assist electric motor output data, so that a steering system intervenes in and controls safe braking after a braking process fails.

A system including a computer having a processor and a memory. The memory includes instructions executable by the processor to, upon actuating movement of a steering element of a vehicle, measure a torque applied to the steering element in a direction opposite the actuated movement. In response to a determination that the torque is less than a predetermined threshold, the processor actuates a component of the vehicle.

An arrangement for operating a load-controlled hydraulic system of an agricultural tractor, includes a hydraulic pump generating a system pressure and having an actuating device to adjust a displacement volume, a hydrostatic vehicle steering system connected to the hydraulic pump and having a steering orbitrol and a first load-indicating pressure, a pressure-regulating valve connected upstream of the steering orbitrol and actuated via a pressure difference decreasing across a throttle element counter to a predetermined restoring force in accordance with the first load-indicating pressure, a second hydraulic consumer connected to the hydraulic pump and feeding a second load-indicating pressure back to a shuttle valve arrangement, which compares and transmits the respectively higher of the first and second load-indicating pressures to the actuating device to adjust the displacement volume, and a pressure-copying valve indirectly feeding back the first load-indicating pressure to the shuttle valve arrangement.

The invention provides a vehicle comfortable braking method and device, a vehicle and a storage medium, and relates to the technical field of automobiles. The method comprises the steps that when a comfortable braking intention is recognized, whether braking is safe or not is judged based on the driving condition of the vehicle; if the judgment result shows that braking is safe, the vehicle is controlled to conduct comfortable braking according to a preset comfortable braking strategy, and the preset comfortable braking strategy comprises the steps that the rigidity of a suspension system of the vehicle is adjusted, and the deceleration in the vehicle braking process is adjusted to be within a preset deceleration range. Safety judgment is carried out on the driving condition of the vehicle before comfortable braking is carried out, when comfortable braking is carried out under the safe driving condition, the rigidity of a suspension system is adjusted so as to reduce the out-of-control risk of the vehicle, double control over comfortable braking safety is carried out in the two time periods before comfortable braking and during comfortable braking, and the safety of the vehicle is improved. Therefore, the safety of comfortable braking of the vehicle is effectively improved.

Systems, apparatuses, and methods for controlling a transmission and other vehicle systems and components based on operation of an auxiliary braking system for a vehicle are disclosed. A controller for a vehicle includes a processing circuit having at least one memory device coupled to at least one processor, the at least one memory device is configured to store instructions thereon that, when executed by the at least one processors, cause the at least one processor to: receive data regarding operation of an auxiliary brake system of the vehicle; determine an auxiliary brake fault condition based on the received data regarding operation of the auxiliary brake system; determine that the vehicle is on or is about to experience a negative road grade; determine a vehicle speed is greater than a requested vehicle speed for the negative road grade; and control a transmission to downshift at least two settings relative to a current transmission setting.

A travel assistance method sets a target slip angle, estimates or detects an actual slip angle, sets a target braking / driving force by, when a sign of the vehicle body slip angle rotating in a turning direction of the vehicle is defined as positive and a sign of the vehicle body slip angle rotating in an opposite direction to the turning direction is defined as negative, correcting a required braking / driving force in such a manner as to increase a braking / driving force for a rear wheel or reduce a braking / driving force generated on a front wheel when the actual slip angle is larger than the target slip angle and correcting the required braking / driving force in such a manner as to reduce a braking / driving force for the rear wheel or increase a braking / driving force generated on the front wheel when the actual slip angle is smaller than the target slip angle.

A chassis integrated control system, comprising: a chassis integrated controller (100), and a wheel-steering electric motor assembly (210), an electromechanical brake caliper assembly (310), a wheel-side drive electric motor assembly (410), an adjustable shock-absorber assembly (510), a wheel-speed sensor (710), a front-view camera assembly (720), a height sensor (730), etc., which are connected to the chassis integrated controller (100) by means of a hard wire, wherein the chassis integrated controller (100) processes a signal, and uses a processing result to control the wheel-steering electric motor assembly (210), the wheel-side drive electric motor assembly (410), the electromechanical brake caliper assembly (310) and the adjustable shock-absorber assembly (510). Further disclosed are a chassis integrated control method, an electronic device, a computer-readable storage medium and a computer program product.

The invention discloses an unmanned mining dump truck hydraulic braking system and a control method. The unmanned mining dump truck hydraulic braking system comprises a service brake valve set and a parking brake valve set. The service brake valve group comprises a first hydraulic proportional pressure reducing valve, a second hydraulic proportional pressure reducing valve, a first shuttle valve and a first pressure sensor; the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are connected in parallel; oil outlets of the first hydraulic proportional pressure reducing valve and the second hydraulic proportional pressure reducing valve are communicated with an oil inlet of a first shuttle valve; an oil outlet of the first shuttle valve is connected with a first pressure sensor; the parking brake valve group comprises an electromagnetic directional valve, a redundant electromagnetic directional valve and a pressure switch; the electromagnetic directional valve is a normally closed valve, and the redundant electromagnetic directional valve is a normally open valve; the electromagnetic directional valve and the redundant electromagnetic directional valve are connected in series, the electromagnetic directional valve is connected with an oil inlet pipeline, the redundant electromagnetic directional valve is connected with an oil outlet pipeline and a parking brake caliper, and a pressure switch is arranged on the oil outlet pipeline.

Systems, methods, and articulated vehicles which use sensor rails attached to trailers to provide improved control for autonomous articulated vehicles. An example vehicle can receive, at a computer system of a tractor operating in an autonomous mode, trailer sensor data from a plurality of trailer sensors located on at least one trailer, the at least one trailer being coupled to the tractor. The computer system can also receive road condition data from at least one sensor, the at least one sensor being located on at least one of the tractor and the at least one trailer. The computer system can then identify, based on the trailer sensor data and the road condition data, a physical condition of the at least one trailer to be modified, and modify, via an electrical signal transmitted from the computer system, the physical condition.

The invention provides a method for braking a vehicle through a redundant braking system, and the method comprises the steps: responding to a received signal indicating that a main braking system of the vehicle breaks down, and obtaining the rotating speed of a motor of the vehicle; first wheel speed data is obtained, and the first wheel speed data indicates the rotating speed of a first wheel driven by the motor; generating second wheel speed data using a differential model based on the motor speed and the first wheel speed data, where the second wheel speed data indicates a speed of a second wheel driven by the motor; and generating a braking command based on the first wheel speed data and the second wheel speed data.

A vehicle includes a powertrain with a prime mover, a transmission with a number of gears, and foundation brakes. The speed of the vehicle along a downhill route segment is automatically controlled toward a target speed by prioritizing the use of engine braking power and gear downshifting in the transmission over application of the vehicle's foundation brakes.

To provide an information processing device capable of calculating an index value in a short period of time by extracting extraction data having obtained the feature of the entire original data.SOLUTION: A processing device of an information processing device executes retrieval processing which includes a first step (S120) of calculating a relative frequency distribution of original data, a second step (S125) of setting a plurality of time windows for cutting out a partial period data of the original data, a third step (S130) of cutting out data from the original data, a fourth step (S140) of calculating a relative frequency distribution of extraction data, and a fifth step (S145) for calculating an error between the relative frequency distribution of the original data and the relative frequency distribution of the extraction data, and repeatedly executes an attempt from the second step to the fifth step, changing settings of the plurality of time windows. The processing device calculates an index value of damage of a friction material of a transmission by using the extraction data whose error becomes equal to or smaller than the threshold value (S160).SELECTED DRAWING: Figure 3

The invention provides a method for braking a vehicle through a redundant braking system, and the method comprises the steps: obtaining the rotating speed Vm of a motor in response to a fault signal received from a main braking system of the vehicle; calculating a wheel speed v of a wheel of the vehicle based on the motor rotation speed Vm; and generating a brake command based on the wheel speed v to control a brake actuator of the vehicle to brake the wheels.

The invention relates to a vehicle control method (1), comprising: detecting (17) an unstable driving state (330) of a vehicle (300) in advance at least using an actual variable (9) and a target trajectory (TSoll); wherein, during the early detection (17), it is ascertained whether the unstable driving state (330) is an understeer (332) of the vehicle (300) or an oversteer (334) of the vehicle (300); and in response to the early detection (17): defining (40) a steering angle correction (41) for the target steering angle ([delta] Soll), the steering angle correction (41) comprising a steering angle limit ([delta] lim) for the available actual steering angle ([delta] Ist) if the unstable driving state (330) is an understeer (332) of the vehicle (300); and wherein, if the unstable driving state (330) of the vehicle (300) is an oversteering (334), the steering angle correction (41) comprises a reverse steering angle (cs) directed opposite the target steering angle ([delta] Soll); and steers (47) the vehicle (300) using the steering angle correction (41). The invention also relates to a vehicle control system (200), a vehicle (300) and a computer program product.

The embodiment of the invention relates to the technical field of vehicle control and intelligent driving, and discloses a redundant braking control method and device and a computer readable storage medium. The method comprises the steps that under the condition that a vehicle is in an intelligent driving function activation state, operation data of the vehicle are detected; according to the operation data, the intelligent driving function and the intelligent driving grade corresponding to the intelligent driving function, a target redundant braking module is determined in the composite redundant braking system; and when the main braking module is in the failure state, the target redundant braking module is adopted to take over the main braking module. According to the technical scheme, intervention of the redundant braking module can meet the current braking requirement of the vehicle, the intervention reasonability of the redundant braking module is improved, and the service life of the redundant braking system is guaranteed.

Provided are a control apparatus of a four-wheel independent control vehicle (10) and a method thereof. The control apparatus of a four-wheel independent control vehicle includes a plurality of wheels (21-24) each installed with a steering device (150), a driving device (160), and a braking device (170), and a processor (110) configured to, when a failure occurs in any one steering device of the plurality of wheels, determine a location of a failed wheel, calculate an insufficient cornering force of the failed wheel, and compensate for the insufficient cornering force by controlling at least one of the steering device, the driving device, and the braking device installed on each of the plurality of wheels. Even though a failure occurs in the steering device of any one wheel, traveling performance can be maintained by compensating for an insufficient cornering force.

The invention relates to a method for compensating for a disadvantageous manual steering intervention during an automated evasive maneuver of a vehicle. During the evasive maneuver, a wheel-specific braking intervention is initiated if an actual steering angle (δ ist ) of a steering wheel of the vehicle due to the manual steering intervention by an angle value above a predetermined limit value from a target steering angle (δ soll ) differs.

The invention provides a single-side braking auxiliary steering control method and system and a vehicle, and the control method comprises the following steps: obtaining a steering wheel steering angle and a vehicle speed, and determining whether to execute single-side braking according to the steering wheel steering angle and the vehicle speed; if yes, the target wheel is braked at the preset target single-side braking pressure; when the ABS function is started, the real-time target unilateral brake pressure of the target wheel is adjusted in real time according to the ABS target brake pressure; calculating the average wheel end driving force of the vehicle when the ABS function is started; after the ABS function exits, the real-time wheel end driving force of the vehicle is obtained, whether the real-time wheel end driving force is larger than the average wheel end driving force or not is judged, and if yes, the real-time target single-side braking pressure of the target wheel is increased; according to the control method, cooperative control of the single-side braking auxiliary steering and the ABS function can be achieved, the single-side braking pressure is adjusted in real time after the ABS function exits, the safety of the single-side braking auxiliary steering is improved, and the abrasion degree of tires can be reduced easily.

The invention relates to a method (1) for improving the driving dynamic stability of a commercial vehicle (300), the commercial vehicle (300) having a lift bridge (314), the method (1) comprising: ascertaining (3) a current driving speed (V) of the commercial vehicle (300); ascertaining (5) a speed (Vcrit) of a critical instability of the commercial vehicle (300); comparing (7) the current driving speed (V) with the critical unstable speed (Vcirct); ascertaining (9) a lifting situation (Slift) of a lifting bridge (314) of the commercial vehicle (300); and lowering (11) the lift bridge (314) of the commercial vehicle (300) if the lift condition (Slift) represents that the lift bridge is in lift (Sup) and the current travel speed (V) is greater than or equal to a critical unstable speed (Vcrit). In addition, the invention also relates to a device for improving the driving dynamic stability of a commercial vehicle (300), a commercial vehicle (300) and a computer program product.

A method for braking a vehicle through a redundant braking system includes (i) in response to a fault signal received from the main braking system of the vehicle, obtaining the motor speed, (ii) calculating the wheel speed of the vehicle based on the motor speed, and (iii) generating a braking command based on the wheel speed to control the braking actuators of the vehicle to brake the wheels.

The disclosure relates to a steering system assembly for a vehicle, for example a steer-by-wire system, in which, in particular, detection devices and implementation devices for a steering request are mechanically decoupled from one another, having: a first steering system for providing a steering function, which is designed to be autonomous and / or has a first energy supply; a second steering system for providing a first fallback level for the steering function, which is designed to be autonomous and / or has a second energy supply; and a third steering system for providing a second fallback level for the steering function, in particular through selective wheel braking.

A computer system comprising processing circuitry to handle brake strategies for a braking arrangement of a vehicle is provided. The braking arrangement has a first brake strategy. The processing circuitry obtains one or more brake strategy parameters. The one or more brake strategy parameters is indicative of a status of the braking arrangement and / or one or more environmental parameters of a road travelled by the vehicle. The processing circuitry is configured to, based on a motion of the vehicle and the one or more brake strategy parameters, select a second brake strategy out of the set of brake strategies for the braking arrangement to use. The processing circuitry triggers the braking arrangement of the vehicle to transition from the first brake strategy to the second brake strategy.

A vehicle body control system, a control method of the vehicle body control system, and a non-transitory computer-readable storage medium storing a program for performing the method may alleviate deterioration of steering performance of a vehicle when an electric power steering (EPS) system of the vehicle fails. The vehicle body control system includes a brake device configured to brake the vehicle, a detector configured to detect a failure of the EPS system, a steering sensor configured to detect an operation of a steering wheel of the vehicle to generate steering operation information, a controller configured to receive the steering operation information and generate a target yaw rate when the failure of the EPS system is detected, and control a brake device to generate a differential braking force required for the calculated target yaw rate.