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Class 701/74 - Having particular means to determine a reference value for wheel slippage or pseudo-vehicle speed


Subclass of Class 701 - Data processing: vehicles, navigation, and relative location
Definition: Antiskid or antilock control under 71 wherein the electrical
No. of patents: 208
Last issue date: 05/14/2013


1            
NumberTitleIssue Date
8442737Method for operating a vehicle brake system and vehicle brake system
A method for operating a vehicle braking system for motor vehicles including a hybrid or electric drive and hydraulically actutable wheel brakes on the front axle, wherein the wheels associated with the rear axle are driven at least partially by an electric motor th...
05/14/2013
8423228Apparatus and method for detecting decrease in tire air pressure and program for detecting decrease in tire air pressure
An apparatus for detecting a decrease in air pressure of a tire attached to a vehicle includes a rotation speed detection means for periodically detecting rotation speeds of tires of respective wheels of the vehicle; a rotation wheel speed ratio calculation means fo...
04/16/2013
8260519Retractable wheel covers
Disclosed herein are embodiments of wheel covers and vehicles having at least one wheel cover. One embodiment of a vehicle having at least one wheel mounted for rotation about an axle comprises a body structure having a portion of which is adjacent to the wheel, a m...
09/04/2012
8239109Output shaft speed sensor based anti-lock braking system
An anti-lock braking system (ABS) calculates driven wheel speed without any sensors on the driven axle assembly. A powertrain control module (PCM) receives signals from an output shaft speed (OSS) sensor and adds the speed and axle ratio information to a control net...
08/07/2012
8150592Method for preventing drive wheels from spinning
A method for preventing spinning of at least one drive wheel in a motor vehicle that has a dual clutch transmission, including the process steps of: a vehicle placed in a first gear unit of the dual clutch transmission; placement of a higher gear for the vehicle in ...
04/03/2012
8086383Vehicle control device
A control input for operating an actual vehicle actuator and a control input for operating a vehicle model are determined by an FB distribution law based on a difference between a reference state amount determined by a vehicle model and an actual state amount of an ...
12/27/2011
8082087Motion control device for vehicle
A motion control device for a vehicle includes a controlling means for maintaining a traveling stability of the vehicle by controlling a braking force of a wheel of the vehicle, a friction coefficient obtaining means for obtaining a friction coefficient of a road su...
12/20/2011
7937203Control system responsive to relation between friction coefficient and wheel rotational speed for a wheel
The invention relates to a control system for a vehicle with wheels, where at least one wheel is connected with means for braking and/or driving the wheel, the control system comprising a measuring device to measure a rotational speed of the wheel, a longitudinal fo...
05/03/2011
7873459Load transfer adaptive traction control system
A method of controlling a vehicle that includes determining a dynamic normal load for the vehicle wheel, modifying the requested torque signal from a traction control system in response to the dynamic normal load to form a modified requested torque and controlling t...
01/18/2011
7822525Travel control device and travel control method
In brake liquid pressure control, a time wasted after the control is started until brake application is actually started is reduced and pulsation noise of brake liquid pressure is reduced. When automatic following control of a vehicle is being operated, a motor for ...
10/26/2010
7650216Vehicle driving system with adaptive skid control
A differentiator calculates the acceleration of the rear wheels. An acceleration threshold calculation means enable the skid-detection acceleration threshold to be adjusted corresponding to the conditions of the vehicle. An acceleration skid-detection means make a c...
01/19/2010
7512473Method for judging road surface condition and device thereof, and program for judging road surface condition
A judgment method of road surface condition includes steps of: periodically detecting the wheel rotational speeds of the four wheel tires of a vehicle, memorizing the wheel rotational speed of each of tires, determining a slip ratio from said wheel rotational speeds...
03/31/2009
7359787Stability control apparatus and load measuring instrument for wheel supporting rolling bearing unit
A stability control apparatus, includes: a grip detector that changes an output based on a grip force applied in a direction hindering a slippage of a wheel, acting on a contact face between the wheel supported by a wheel supporting rolling bearing unit and the road...
04/15/2008
7349775Motor vehicle state detecting system
System for detecting stability/instability of behavior of a motor vehicle upon occurrence of tire slip or lock. State of the motor vehicle is determined on the basis of an alignment torque (Ta) applied from a road and a side slip angle (β). By taking advantage of s...
03/25/2008
7315777Vehicle control method and vehicle control apparatus
A target resultant force to be applied to a vehicle body is calculated, the magnitude of a critical friction circle of each wheel is estimated, and a critical resultant force is estimated from the estimated magnitude of the critical friction circle. Subsequently, a ...
01/01/2008
7308373Method for determining a vehicle reference velocity
A velocity and acceleration are measured (14) in a method for determining a vehicle reference velocity, said vehicle reference velocity being used for determining and selecting a suitable transmission ratio. If a measured acceleration (aist) exceed...
12/11/2007
7308350Method and apparatus for determining adaptive brake gain parameters for use in a safety system of an automotive vehicle
A control system for an automotive vehicle (10) and method for operating the same includes a controller (26) that is used to control the brake system in response to an adaptive brake gain coefficient. The adaptive brake gain coefficient may be used by ...
12/11/2007
7277816Tire grip sensor and control system using the sensor
A system for directly measuring tire grip conditions is provided which can measure a skidding condition with no need of applying a vibration. A tire rotation speed sensor comprising a detection gear and a magnet sensor is mounted to a rotating shaft of a tire. An ou...
10/02/2007
7266437Temperature dependent trigger control for a traction control system
A method a operating a traction control system using a traction controller (30) for an automotive vehicle (10) is provided. A slip target is first determined. Then, an operating temperature turning characteristic or slope of the slip curve may, in comb...
09/04/2007
7228219Straight running judging device for vehicles
A straight running state is accurately determined using only wheel speed data in any running state. Based upon right and left wheel speed values calculated by a wheel speed calculating mechanism (13) from detection values of right and left wheel speed sensors...
06/05/2007
7225072System for controlling the stability of a vehicle using several predictive algorithms and a selection process
System for controlling the stability of a vehicle, the system comprising means for imparting a longitudinal force to the tire and means for calculating a slip GOpt by determining the values of the coefficient of friction μi, for each slip G
05/29/2007
7222923Vehicle wheel speed estimation device, vehicle body speed estimation device and vehicle behavior control apparatus
In a case where one of a left and right pair of drive wheels is a non-controlled wheel to which braking force of a vehicle behavior control is not applied, and the other of the drive wheels is a controlled wheel to which braking force is applied, a detected vehicle ...
05/29/2007
7197380System for controlling the stability of a vehicle using an algorithm comparing average slopes of variation of a parameter
System for controlling the stability of a vehicle, the system comprising means for imparting a longitudinal force on the tire and means for calculating the slip parameter GOpt at each activation of the means for imparting a longitudinal force on the tire ...
03/27/2007
7197386Control system for a vehicle with at least part-time four-wheel drive
In the case of a control system for a vehicle with at least part-time four-wheel drive, having a control unit which detects or determines quantities proportional to the wheel speeds of all wheels and the vehicle speed, and by means of which the driving torque of a d...
03/27/2007
7162352Electronic apparatus and method of correcting offset value of acceleration sensor
According to one embodiment, an electronic apparatus includes acceleration computing unit correcting an output value from a acceleration sensor with an offset value so as to obtain an acceleration of a body, rest determining unit determining whether or not the body ...
01/09/2007
7141946Method and apparatus for providing optimal acceleration feedback
A method and apparatus for use with a motor controller that receives a command velocity and that applies voltages to drive a motor at the command velocity, the apparatus comprising a dual inertia lost motion assembly including a motor and a load couplable to the mot...
11/28/2006
7137673Vehicle yaw stability system and method
A yaw stability system for a vehicle as well as methods for controlling yaw in a vehicle and estimating the retarding torque of an electromagnetic retarder. The yaw stability system includes a yaw rate sensor, a plurality of braking devices, and a control unit. The ...
11/21/2006
7099765Direct determination of the maximum grip coefficient on the basis of measurement of the circumferential extension in a sidewall of a tire
A method of determining the grip coefficient μ in the contact area of a tire on a road includes the steps of selecting a plurality of fixed points in space (that is to say ones that are fixed in the reference frame associated with the vehicle) which points lie at d...
08/29/2006
7069133Wheel speed calculation method
A wheel speed calculation method wherein, when both rising and falling edges occur, the wheel speed is calculated using both the edges, when either of the edges does not occur, the wheel speed is calculated using both the edges in such a manner that for the edge not...
06/27/2006
7054726Control apparatus for vehicle-use electric power generator
It is desirable prevent the speed of an engine, that is driving an electric-power generator, from abruptly increasing when electric power generation by the electric power generator, which supplies electric power to a wheel-driving motor, is stopped. Thus, a control ...
05/30/2006
7032705Oversteering/understeering compensation with active front steering using steer by wire technology
The present invention provides a system for compensating understeer and oversteer in a vehicle having a steer by wire system. The system includes a driver interface system, a sensor system, a controller, and a road wheel steering actuation system. The driver interfa...
04/25/2006
6999859Vehicle speed measuring apparatus
A vehicle speed measuring apparatus includes front and rear wheel side vibration detection sensors for detecting vibrations from a road surface through tires, an input section through which the vibration detection sensors input their detection values, and a processi...
02/14/2006
6980903Exhaust gas control using a spark plug ionization signal
This feature of the present invention comprises a method and apparatus to reduce NOx emissions in an internal combustion engine. This feature of the present invention uses a closed loop control of the exhaust gas re-circulation to provide the engine with the either ...
12/27/2005
6954691Method for determining the dynamics of vehicle movement
A method for the online determination of values of driving dynamics for a motor vehicle. To improve the quality of the control of a motor vehicle and to reduce the demands placed on the driver, the invention discloses a driving dynamics control including the (1) est...
10/11/2005
6952638Curve-dependent engine drag-torque control
An engine drag-torque control, particularly for motor vehicles, in which the engine torque is increased by an EDC augmenting torque when the driven wheels drop below a slip threshold due to the braking action of the engine and exhibit a brake slip which is too high....
10/04/2005
6928355Vehicular antiskid control apparatus and antiskid control method
If a condition for starting a yaw control during an antiskid control is met while the antiskid control is being executed on one of right and left front wheels during braking on a uneven friction-coeffient road surface, the reference value for making the determinatio...
08/09/2005
6923050Automatic control method, usable in particular for maintaining the slip of a tire at an optimum level
An automatic control method is provided for a phenomenon in which a parameter Y varies as a function of a parameter X according to a course exhibiting a rise, an extremum and a fall, in which the value of the parameter X is automatically controlled to maintain the v...
08/02/2005
6923512Arrangement for ensuring the function of a vehicle brake
An arrangement for ensuring the functioning of a brake configuration for a vehicle with a multiplicity of wheels which are arranged on a front axle and at least one rear axle and which support the vehicle. The brake configuration incorporates at least two brake devi...
08/02/2005
6915193Method for determining a longitudinal vehicle velocity by compensating individual wheel speeds using pitch attitude
A control system (24) for controlling a safety system (40) of an automotive vehicle includes a plurality of wheel speed sensors (30) generating a plurality of wheel velocity signals, a steering angle sensor (39) generating a steering actu...
07/05/2005
6912896Methods for estimation of tire wear
A method for controlling the functioning of a tire includes the steps of determining estimations or measurements of the slip Gi and the coefficient of friction μi prevailing at such slip for at least one pair “i” of values (Gi, ...
07/05/2005
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