287 results about "Traction control system" patented technology

Improved methods of controlling the stability of a vehicle are provided via the cooperative operation of vehicle stability control systems such as an Active Yaw Control system, Antilock Braking System, and Traction Control System. These methods use recognition of road surface information including the road friction coefficient (mu), wheel slippage, and yaw deviations. The methods then modify the settings of the active damping system and/or the distribution of drive torque, as necessary, to increase/reduce damping in the suspension and shift torque application at the wheels, thus preventing a significant shift of load in the vehicle and/or improving vehicle drivability and comfort. The adjustments of the active damping system or torque distribution temporarily override any characteristics that were pre-selected by the driver.

A pneumatic vehicle tire includes a carcass, a bead with a bead core arranged in the bead, and a first sensor located within the bead. The first sensor delivers signals which are correlated to frictional forces transmitted by the pneumatic vehicle tire during operation. This sensor has a first end and a second end, wherein the first end includes a heel attached to the bead core and the second end extends radially outward from the bead core within the tire. A plurality of such sensors can be included in each tire, some for measuring longitudinal forces in a circumferential direction of the tire and others for measuring lateral forces in an axial direction of the tire.

The invention discloses an automatic passage method through phase splitting for an AC-DC-AC electric locomotive which comprises the following steps: before the electric locomotive runs into a neutral section, a traction control system controls a traction motor to work in a regenerative braking mode and controls an inverter to stabilize intermediate DC voltage; a pulse rectifier works in an inversion state; an alternating voltage equal to a traction voltage is generated on the primary side of a traction transformer, thereby making the primary side of the traction transformer obtain zero current from a power supply arm; after the electric locomotive runs into the neutral section, the intermediate DC voltage still maintains stability; the AC phase generated by the inversion of the pulse rectifier in the inversion mode changes gradually so as to make the voltage of the primary side of the traction transformer change to become equal to the traction voltage of a next power supply arm; and then the electric locomotive enters the next power supply arm and runs normally. The method enables the automatic passage through phase splitting; in addition during the phase splitting, a main circuit breaker does not need to be turned on and off without arc discharge, interception overvoltage and closing surge overcurrent, and an auxiliary system is not deenergized; and the passage through phase splitting has short time, low traction loss and small speed drop.

In one example, A method for controlling a powertrain of a vehicle with wheels, the vehicle having a pedal actuated by a driver, is described. The method may include generating powertrain torque transmitted to the wheels in a first relation to actuation of the pedal by the driver during a first condition where said transmitted torque causes said wheels to slip relative to a surface; overriding said driver actuated powertrain torque to control said slip; and during a second condition after said first condition where said vehicle is moving less than a threshold, generating powertrain torque transmitted to the wheels in a second relation to actuation of the pedal by the driver, where for a given pedal position, less powertrain torque is transmitted with said second relation compared to said first relation.

The invention relates to a layered control method of hybrid electric vehicle traction, comprising the following steps of: (1) arranging an upper expected-drive total-moment calculating layer, a middle dynamic coordination control layer and a bottom escape mechanism layer; (2) according to driver operation input, obtaining an expected engine torque and an expected motor torque; (3) inputting the expected engine torque, the expected motor torque, the wheel speed of a driving wheel and an objective slippage rate into the upper expected-drive total-moment calculating layer to calculate the expected drive total moment of a whole vehicle driving system; (4) inputting an actual drive total moment, the expected drive total moment of the whole vehicle driving system and the expected motor torque into the middle dynamic coordination control layer to calculate the objective torques of an engine and a motor; and (5) inputting the objective torques of the engine and the motor, the expected engine and motor torques and all the driving wheel slippage rate into the bottom escape mechanism layer to establish an exit strategy of the dynamic-compensation hybrid electric vehicle traction layered control system and calculate engine torque commands and motor torque commands. The invention can be widely applied to a traction control system of various hybrid electric vehicles.

This invention relates to a fixed connecting engine driving control system composed of two engines. Each engine has the same controlling system composed of central control unit, driving control unit, logic control unit, display unit, operation safety monitoring unit and electrical braking logic unit. It is characterized by the following: each engine control system adopts local network bus to make the data communication between module plates in each unit.

Action force of a wheel is measured in order to measure the road surface frictional force, vertical drag, road surface friction coefficient, etc. Means for making these measurements can be constituents of an antilock brake system, traction control system, etc. These constituents may also serve as devices for measuring stresses generated in other structures. In a specific example, axle of a vehicle is formed with a hole, a stress detection sensor is installed in the hole and secured in position with the aid of a spacer element, and a detection signal from the stress detection sensor is processed in a signal processing circuit.

A differential steering and traction control system for an electrically propelled mower. Each of the front wheels has an electric motor wheel drive, and each rear wheel may have an electric steering motor. The operator's station has a steering wheel and a speed control. An electronic controller provides steering commands to the electric steering motor and separate speed commands to each electric motor wheel drive based on the angle of the rear wheel and the position of the speed control.

The invention discloses a track traffic train traction brake system and method. The system comprises a central control system, a brake executing device and a traction control system, wherein the brake executing device and the traction control system are respectively connected to the central control system; the central control system comprises a brake control module which is used for controlling the execution of electropneumatic hybrid brake; the central control system receives a traction command and a brake command of trains from a train communications network, and starts the traction control system to control and execute the traction operation according to the received commands, or the brake control module is used for controlling the brake executing device and the traction control system to execute the electropneumatic hybrid brake. According to the method, the system is used for executing traction and brake. The track traffic train traction brake system disclosed by the invention has the advantages of being simple in structure, low in required cost, capable of executing brake control in real time, and high in electropneumatic hybrid precision and efficiency.

The invention discloses a motor-assisted integrated automobile brake system. The motor-assisted integrated automobile brake system comprises a pedal input unit, a power unit, a hydraulic unit, a brake master cylinder, and a liquid storage chamber, wherein the pedal input unit is connected with the power unit; the power unit is connected with the brake master cylinder; the brake master cylinder is respectively connected with the liquid storage chamber and the hydraulic unit; an electric control unit is electrically connected with the pedal input unit, the power unit and the hydraulic unit respectively; and the hydraulic unit is connected with each brake cylinder. According to the invention, a direct current motor drives a ball screw to push the brake master cylinder through a rubber reaction disc to generate assisting power, thereby realizing three braking modes of driver braking, motor braking, and coordinated braking of driver and motor. When the motor fails, the driver can also realize large braking intensity by executing braking independently so as to ensure safe and reliable braking. The motor-assisted integrated automobile brake system disclosed by the invention has the advantages of small size of the overall brake system, light weight and low cost, can integrate a plurality of functions of ABS (anti-lock brake system), TCS (traction control system), ESP (electronic stability program) and the like, and can effectively reduce the braking distance.

A traction control system and method are provided for an aircraft equipped with a ground travel drive system with drive wheels powered by onboard wheel drive means that are capable of translating torque through the aircraft drive wheels and that are automatically controllable to control traction without reliance on the aircraft's brakes to keep the aircraft moving efficiently and autonomously on the ground under a range of environmental conditions.

A traction control system is provided that is applicable to both two wheel drive and four wheel drive electric vehicles, and which is capable of handling both low frequency and high frequency control duties. The system uses proportional gains in order to minimize controller delays and insure a natural feeling traction control system.

A traction control system and method are provided for electric vehicles with at least one drive wheel powered by an electric drive motor to maintain optimum maximum traction while the vehicle is driven on the ground. The traction control system includes drive means capable of transmitting torque through a vehicle drive wheel and controllable to move the vehicle over a ground surface. A preferred drive means is an electric motor designed to move the vehicle at desired ground speeds in response to operator input. Operator input requests a desired speed, and the system determines drive wheel torque required to produce the desired speed and provides maximum current to produce maximum torque to drive the vehicle with optimum traction at the desired speed. The system uses constant feedback to find maximum current corresponding to torque required for an inputted speed request to automatically control traction in any electric powered vehicle.

The invention provides a magnetic levitation operation control system. The system comprises a central operation control system, a safety control center and a vehicle-mounted control system. The central operation control system completes operation planning, real-time scheduling, route presetting and turnout control of a maglev train, generates operation parameters and transmits the operation parameters to the safety control center; the safety control center is responsible for full-line access protection, full-line traction cut off, full line turnout protection, full line driving sequence control, full line train protection, the full line automatic driving, the full line speed curve monitoring and the full line positioning functions, and distributes operation data to a traction control system, a traction cut off unit, a turnout protection unit and the vehicle-mounted control system of full line all operation partitions. The centralized and unified safety control center is adopted to replace an original independent partition operation control system of each operation partition, signals of all the operation partitions are collected to the safety control center, signal interactions between adjacent operation partitions are eliminated, signal transmission faults are reduced, and the operation efficiency of the train is guaranteed.

A traction control system in vehicle comprises a detector for detecting a monitored value which changes according to a degree of a drive wheel slip; a condition determiner for determining whether or not the monitored value meets a control start condition and whether or not the monitored value meets a control termination condition; and a controller for executing traction control to reduce a driving power of the drive wheel during a period of time from when the condition determiner determines that the monitored value meets the control start condition until the condition determiner determines that the monitored value meets the control termination condition; the condition determiner being configured to set at least the control start condition variably based on a slip determination factor which changes according to a vehicle state and such that the control start condition changes more greatly according to the vehicle state than the control termination condition.

A traction control system configured to limit slip by a machine having a work implement including a machine motion sensor configured to determine a motion of the machine, a work implement unit configured to determine whether the work implement is in an operational state, a powertrain motion sensor configured to determine a motion of a powertrain component, and a machine powertrain controller configured to determine slip by comparing the motion of the machine to the motion of the powertrain component, wherein the machine powertrain controller is configured to command a torque reduction to the powertrain component when slip is determined.