Class / Patent application number | Description | Number of patent applications / Date published |
701084000 |
Control of engine torque
| 36 |
701083000 |
Control of brake pressure
| 20 |
701090000 |
Having particular slip threshold, target slip ratio, or target engine torque determining means
| 18 |
701087000 |
Control of transmission torque
| 8 |
701088000 |
Restricting differential operation
| 7 |
701089000 |
Four wheel drive vehicle
| 6 |
701091000 |
Integrated with antiskid or other vehicle control system (e.g., cruise control, suspension) | 3 |
20090198428 | METHOD FOR ADAPTING EMERGENCY BRAKING DETECTION TO SEQUENCED BRAKING RECOGNITION - A method for controlling braking in a motor vehicle equipped with a brake servo unit capable of being implemented in a braking system including: a hydraulic master cylinder associated with a vacuum brake booster and with hydraulic circuits supplying the wheel brakes equipping the vehicle wheels; an ABS hydraulic unit with wheel antiskid function, and an electronic mechanism implementing emergency braking assisted by the hydraulic unit. The method detects serial repetition in time for implementing emergency braking operations and adapts the conditions for implementing an emergency braking in case of serial repetition. | 08-06-2009 |
20100017090 | VEHICLE - During vehicle operation, drive wheels are constantly monitored to see whether or not slip of drive wheels occurs and when slip is detected, posture control for slip conditions is performed by uncoupling normal posture control for the drive wheels. A balancer (weight body) which is movable in a longitudinal direction of the vehicle is provided, and posture control is performed by moving the balancer backward when the vehicle inclines forward due to slip and moving the balancer forward when the vehicle inclines backward. The detection of slip is through a comparison between the drive wheels circumferential speed V | 01-21-2010 |
20100191434 | DRIVING-FORCE CONTROL APPARATUS FOR VEHICLE - Several low-friction-coefficient road-surface determination devices determine whether a road surface has a low friction coefficient based on the highest and lowest wheel speeds; the wheel speeds of front and rear wheels; wheel speeds of a left-hand and right-hand driving wheels; and by comparing a reference vehicle-body acceleration calculated from a driving force of an engine with an actual vehicle-body acceleration calculated from a calculated number of revolutions of differential gears. A low-friction-coefficient road-surface total-determination device makes a total determination as to whether the road surface has a low friction coefficient based on the determination results of the low-friction-coefficient road-surface determination devices. Accordingly, each low-friction-coefficient road-surface determination device is capable of compensating for disadvantages of the other devices. | 07-29-2010 |
701092000 |
Fail-safe system | 1 |
20110054758 | Method for Maintaining a Brake Rotor - A disc braking system of a vehicle determines the actual temperature of a brake rotor. The disc braking system compares the actual temperature of the brake rotor to a critical temperature of the brake rotor. The critical temperature of the brake rotor is a temperature above which damage and/or warping to the brake rotor may occur. The disc braking system applies a corrective measure to prevent damage to the brake rotor when the actual temperature of the brake rotor is greater than the critical temperature of the brake rotor. The corrective measure may include, but is not limited to: displaying a warning, adjusting a fraction control system of the vehicle, scheduling maintenance for the vehicle. | 03-03-2011 |
Entries |
Document | Title | Date |
20080208428 | METHOD OF DETERMINING WHEEL SLIPPAGE AND ENGAGING A DIFFERENTIAL LOCK IN A WORK VEHICLE - A method of determining wheel slippage in a work vehicle includes the steps of: sensing an absolute ground speed of the work vehicle; calculating a ground speed of the work vehicle using at least one drive train component; comparing the absolute ground speed with the calculated ground speed; generating a scaling factor based upon the comparison; and adjusting the calculated ground speed using the scaling factor. The method may also include the steps of scaling the absolute ground speed to a threshold value; comparing the calculated ground speed with the threshold value; and engaging a differential lock if the calculated ground speed is greater than the threshold value. | 08-28-2008 |
20080234911 | Vehicle driving force control device - A vehicle driving force control device controls engine torque so as to correct driver's request-engine-torque with the torque-down amount by an engine control unit, the torque-down amount being set into the lower one of a first torque-down amount and a second torque-down amount by a control-amount setting unit, the first torque-down amount being calculated on the basis of a relation between a tire force generated on a tire and a maximum tire force which the tire is capable of exercising against a current road-surface by a first traction control unit, the second torque-down amount being calculated on the basis of a slip rate of the tire by a second traction control unit. | 09-25-2008 |
20090012689 | METHOD OF ESTIMATING AN AVAILABLE GRIP MARGIN OF A TIRE WHEN ROLLING - A method of estimating the available grip margin of a tire of a vehicle rolling on a ground involves:
| 01-08-2009 |
20090150037 | ADAPTIVE TRACTION CONTROL SYSTEM - A method of controlling a traction control system ( | 06-11-2009 |
20090276134 | SLIP CONTROL FOR A MATERIALS HANDLING VEHICLE - A vehicle is provided comprising: a main body; a plurality of wheels coupled to the main body; a traction motor associated with the main body and coupled to at least one of the wheels for driving the one wheel; control apparatus coupled to the traction motor and generating a motor drive signal to the traction motor; a first sensor for generating a velocity signal indicative of a velocity of the driven wheel; and a further sensor for sensing an acceleration of the main body and generating a vehicle acceleration signal. The control apparatus determining a measured velocity of the driven wheel from the first sensor speed signal, calculating a velocity of the vehicle using the vehicle acceleration signal and comparing the measured velocity of the driven wheel to the calculated velocity of the vehicle to determine wheel slip status. | 11-05-2009 |
20100250086 | Road Surface Condition Identification Based on Statistical Pattern Recognition - A method is provided for determining an adhesive condition of a surface of a vehicle road using a statistical pattern recognition technique. A plurality of probability distribution functions is provided representing respective adhesive effects between the vehicle tire of a driven vehicle and the vehicle road. An index is calculated which represents a vehicle understeer characteristic. Probability analysis is applied for each of the road surface adhesive conditions as a function of the index. Each probability analysis is recursively updated. A likelihood factor is determined for each road surface adhesive condition as a function of each respective recursively updated probability analysis. Each respective road surface adhesive condition has a respective likelihood factor that identifies the likelihood of the road surface having the respective adhesive condition as a function of the index. The identified adhesive condition of the road surface is input into a vehicle control process. | 09-30-2010 |
20100299040 | Method and device of calculating aircraft braking friction and other relating landing performance parameters based on the data received from aircraft's on board flight data management system - This invention relates to a method and apparatus for the calculation of aircraft braking friction and other relating landing parameters, including but not limited to aircraft braking action, aircraft takeoff distance, aircraft landing distance, runway surface conditions and runway surface friction based on the data collected by and available in the aircraft Flight Data Recorder (FDR) or other flight data management system, for example, the Quick Access Recorder (QAR), to provide all involved personnel in the ground operations of an airport and airline operations, including but not limited to aircraft pilots, airline operation officers and airline managers as well as airport operators, managers and maintenance crews, with the most accurate and most recent information on the true aircraft landing performance parameters to help better and more accurate safety and economical decision making. | 11-25-2010 |
20100312448 | METHOD FOR DETECTING WHEEL SLIP - In a method for detecting wheel slip at least one wheel which is driven by an engine, the drive torque acting upon the wheel is varied, and the reaction of the wheel to the change in the drive torque is measured and evaluated. | 12-09-2010 |
20100312449 | SYSTEM AND METHOD FOR CONTROLLING TRACTION IN A TWO-WHEELED VEHICLE - The present invention refers to a system and method for controlling traction in a two-wheeled vehicle comprising a torque controlled motor and a plurality of sensors for instantaneously measuring driving parameters (v, φ, θ, ω, x, a, RPM, gear) of said vehicle, the method comprising the steps of determining a reference slip value (λ | 12-09-2010 |
20110066348 | METHOD AND SYSTEM FOR CONTROLLING VEHICLE FUNCTIONS IN RESPONSE TO AT LEAST ONE OF GRADE, TRAILERING, AND HEAVY LOAD - A control module and method for controlling vehicle systems, including a possible acceleration module determining possible vehicle acceleration, an actual acceleration module determining actual vehicle acceleration, and a vehicle system control module controlling or providing input to the vehicle systems in response to the difference between possible vehicle acceleration and actual vehicle acceleration. | 03-17-2011 |
20110166763 | Apparatus and method detecting a robot slip - An apparatus and method for detecting a slip of a robot. According to the apparatus and method, the probability of a slip occurring may be preliminarily determined using a first acceleration obtained from an acceleration sensor and a second acceleration obtained from an encoder. Then, finally the occurrence of a slip may be determined using a change in a driving control signal. Thus, accurate detection of a slip can be realized while preventing incorrect determination of slip occurrence. | 07-07-2011 |
20130060442 | UNINTENDED ACCELERATION DETECTION AND CORRECTION - Systems and methods for detecting unintended acceleration of a vehicle. One system includes a first sensor that provides information on a brake booster vacuum. The vacuum is provided by the vehicle's engine and the brake booster multiplies a braking force initiated by a driver. A second sensor provides information on the vehicle's speed, and a third sensor provides information on the braking force initiated by the driver. The system also includes a controller configured to receive the information from the first sensor, second sensor, and third sensor and initiate corrective action if the brake booster vacuum is less than a predetermined threshold, the vehicle's speed is greater than a predetermined threshold, and the braking force initiated by the driver is greater than a predetermined threshold. | 03-07-2013 |
20130197772 | Hydrostatic Drive System - A hydrostatic drive system includes an anti-slip control unit having a hydraulic pump which supplies a plurality of hydraulic motors of a plurality of axles with pressure medium. Based on a detected slip, a control device switches over between a two-wheel and a multiple-wheel drive and controls the driving torque. Optimal distribution of driving torque and traction between the axles or wheels of the drive system is set in the drive system. A method for anti-slip control of a hydrostatic drive system includes reacting to a slip situation by activating a hydraulic motor for axles or wheels which until then were not driven, or driven only with low driving torque or by increasing the driving torque of wheels which until then did not slip. The capacity of the hydraulic motor of the axles or wheels is raised to enable the activation/increase. | 08-01-2013 |
20130204504 | TRACTION AID FUNCTION FOR VEHICLES HAVING MULTIPLE DRIVEN AXLES - A method for transferring the drive torque from the wheels having a low traction to the wheels having a higher traction, the method being configured for vehicles in which not all driven wheels are equipped with a rotational speed sensor. In order to be able to perform a starting aid function, it is provided to measure the rotational speed of the cardan shaft and to put it in relation to the wheel rotational speed of at least one wheel which has a rotational speed sensor. If the deviation between the cardan shaft rotational speed and the measured wheel rotational speed is too high, at least one of the wheels, which does not have a rotational speed sensor, is braked automatically so that the vehicle is able to start. | 08-08-2013 |
20130325283 | METHOD FOR CONTROLLING THE YAW MOMENT OF A VEHICLE - A method for determining the yaw tendency of a vehicle is hereby presented. The method comprises the steps of determining the propulsion states of one or several wheels of said vehicle, and estimating yaw moment variations of a vehicle from said propulsion states, wherein said yaw moment variations are induced from altered propulsion states between at least two of the wheels of said vehicle. | 12-05-2013 |
20140058643 | DRIVING FORCE CONTROL APPARATUS AND VEHICLE CONTROL METHOD - A driving force control apparatus includes: a turning radius estimating unit that estimates a turning radius of a four-wheel-drive vehicle; a target slip angle computing unit that computes a target slip angle at the time of turning of the four-wheel-drive vehicle, on the basis of the estimated turning radius; a target rotational speed computing unit that computes target rotational speeds of right and left rear wheels of the four-wheel-drive vehicle, on the basis of the estimated turning radius, the computed target slip angle, and a vehicle speed; and a driving force control unit that controls driving forces that are transmitted to the right and left rear wheels such that actual rotational speeds of the right and left rear wheels approach the computed target rotational speeds. | 02-27-2014 |
20140129109 | SYSTEM AND METHOD FOR CONTROLLING COUPLER NODES IN A VEHICLE SYSTEM - A method for controlling coupler nodes in a vehicle system includes monitoring coupler forces between vehicle units in the vehicle system. The vehicle units include plural propulsion-generating vehicles. The method also includes identifying one or more nodes in the vehicle system based on the coupler forces. The one or more nodes represent one or more respective locations in the vehicle system disposed between a tensile section of the vehicle system experiencing a tensile force and a compressive section of the vehicle system experiencing a compressive force. The method also includes independently controlling tractive operations of the propulsion-generating vehicles based on the one or more nodes that are identified in order to control at least one of a number of the one or more nodes that are identified in the vehicle system or the one or more locations of the one or more nodes. | 05-08-2014 |
20140136072 | METHOD FOR ADJUSTING THE STARTING TORQUE IN A VEHICLE - In a method for adjusting the drive-off torque while driving off in a vehicle, the rise (δM | 05-15-2014 |
20150012201 | BRAKE CONTROL SYSTEM COMPRISING RUNWAY FRICTION PROPERTY ESTIMATION MAPPING - Systems and methods for detecting the onset of wheel skids and controlling brake torque to achieve efficient and smooth braking performance are described herein. A brake control system may utilize an algorithm, along with substantially real-time measured values to assist with controlling brake torque to achieve efficient and smooth braking performance. A history of wheel speed information, such as wheel speed information associated with one or more landing event, may also be used to iteratively estimate tire/runway friction properties. | 01-08-2015 |
20150019102 | SYSTEM AND METHOD OF CONTROLLING STARTING OF VEHICLE - A system and a method of controlling vehicle starting may include a wheel speed sensor detecting a speed of at least one wheel among wheels of the vehicle, a vehicle speed detector detecting a vehicle speed, an acceleration detector detecting a vehicle acceleration, a vertical acceleration sensor detecting a vertical acceleration of the vehicle, a wheel torque detector calculating a wheel torque, an ambient temperature sensor detecting an ambient temperature, and a controller. The controller may calculate a wheel slip amount based on the speed of at least one wheel, the vehicle speed and the vehicle acceleration, determine whether a wheel slip occurs by comparing the wheel slip amount with a first predetermined wheel slip amount, determine a road state based on the ambient temperature and the vertical acceleration of the vehicle if the wheel slip occurs, and perform a starting control according to the road state. | 01-15-2015 |
20150019103 | MOBILE ROBOT HAVING FRICTION COEFFICIENT ESTIMATION FUNCTION AND FRICTION COEFFICIENT ESTIMATION METHOD - A mobile robot configured to move on a ground. The mobile robot including a contact angle estimation unit estimating contact angles between wheels of the mobile robot and the ground and uncertainties associated with the contact angles, a traction force estimation unit estimating traction forces applied to the wheels and traction force uncertainties, a normal force estimation unit estimating normal forces applied to the wheels and normal force uncertainties, a friction coefficient estimation unit estimating friction coefficients between the wheels and the ground, a friction coefficient uncertainty estimation unit estimating friction coefficient uncertainties, and a controller determining the maximum friction coefficient from among the friction coefficients such that the maximum friction coefficient has an uncertainty less than a threshold and at a point of time when the torque applied to each of the wheels changes from an increasing state to a decreasing state, among the estimated friction coefficients. | 01-15-2015 |
20150127240 | SADDLE-STRADDLING TYPE MOTOR VEHICLE AND WHEEL FORCE ACQUISITION DEVICE - A saddle-straddling type motor vehicle on which an object is loadable for traveling with the motor vehicle. The motor vehicle includes a main body having a wheel, a motor that generates driving force for moving the main body, a wheel force calculator configured to calculate wheel force exerted between the wheel and a surface of a road on which the motor vehicle is traveling, and a wheel force corrector configured to correct the wheel force calculated by the wheel force calculator based on a condition of the object loaded on the motor vehicle. | 05-07-2015 |
20150315000 | VEHICLE CONTROL SYSTEMS AND METHODS - Vehicles equipped with certain embodiments may be used to pick up a load and to assist the vehicle operator's control of the vehicle in a manner that inhibits damage to the load. In some embodiments, portions of the system measure a distance between a vehicle and a load. The distance measurement is used by a controller in the vehicle to alter one or more of vehicle and/or vehicle component speed, acceleration characteristics, deceleration characteristics, target speed, or speed limit, singularly or in any combination. | 11-05-2015 |
20160090107 | VEHICLE TRACTION CONTROL SYSTEM AND METHOD - A method and system determine, during movement of a vehicle system along a route, a tractive load demanded by the vehicle system to propel the vehicle system along the route. The vehicle system includes a propulsion-generating vehicle having plural individually controllable traction motors. A first selected set of the traction motors for deactivation is identified during the movement of the vehicle system along the route based at least in part on the tractive load demanded by the vehicle system. The traction motors in the first selected set are deactivated while at least one of the traction motors in a first remaining set of the traction motors continues to generate tractive effort to propel the vehicle system. The traction motors that are selected for deactivation may all be on the same vehicle in the vehicle system, or may be on different vehicles of the same vehicle system. | 03-31-2016 |
20190143949 | Vehicle with Starter Aid | 05-16-2019 |
20190143986 | TORQUE MODULATION TO LINEARIZE TIRE SLIP CHARACTERISTICS | 05-16-2019 |