Motor Control Patents (Class 303/142)
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Patent number: 11697419Abstract: The present invention relates to the field of vehicles, in particular to a vehicle slip regulation method and apparatus, an electronic device and a medium. The vehicle slip regulation method comprises the following steps: determining a pavement type of a vehicle driving pavement in response to a vehicle acceleration slip regulation event; determining an overall target acceleration of a vehicle according to the determined pavement type, the speed of a non-driving wheel and the slip time of a driving wheel; and performing vehicle slip regulation according to the overall target acceleration. The method does not need to determine wheel adhesion coefficient of a vehicle according to coefficients such as vehicle weight and road slope, can perform slip regulation by calculating overall target accelerations under different pavements, and has strong practicability and robustness and good acceleration slip regulation effect.Type: GrantFiled: July 12, 2022Date of Patent: July 11, 2023Assignees: TIANJIN SOTEREA AUTOMOTIVE TECHNOLOGY LIMITED COMPANY, ZHEJIANG SOTEREA TECHNOLOGY GROUP LIMITED COMPANYInventor: Xianjie Xu
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Patent number: 8960813Abstract: The invention relates to a method in which the driving stability of a vehicle is controlled, wherein a yaw rate difference is influenced by an additional yaw moment which is generated at least partially by building up braking torque independently of the driver at one or more wheels. According to the invention, the braking torque which influences the additional yaw moment is variably apportioned between the front axle and the rear axle of the vehicle in an oversteering situation.Type: GrantFiled: December 17, 2010Date of Patent: February 24, 2015Assignee: Continental Teves AG & Co. oHGInventors: Matthias Muntu, Volker Bremeier
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Patent number: 8657389Abstract: A cooperative traction control system wherein individualized control over each wheel's longitudinal slip and/or lateral skidding is provided. The system uses a combination of an existing traction and stability module linked with a drive torque actuator capable of modulating the amount of drive torque at a given wheel on a specified axle. The system permits drive torque at the slipping and/or laterally skidding wheel to be controlled, either alone or in combination with brake actuation and throttle angle control, to reduce or control wheel slip and/or lateral skid and/or vehicle motion.Type: GrantFiled: May 20, 2005Date of Patent: February 25, 2014Assignee: Honda Motor Co., Ltd.Inventors: James W. Post, II, Theodore Klaus
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Patent number: 8649945Abstract: A traction force control section of a wheel loader reduces maximum traction force to below the maximum traction force with traction force control in an off state when the traction force control is in an on state. The traction force control section increases the maximum traction force when determination conditions are satisfied with the traction force control in the on state. The determination conditions include that the work situation is digging, that the operation amount of the acceleration operation member is the predetermined operation threshold or more, and that a boom angle is the predetermined angle threshold or more.Type: GrantFiled: May 15, 2012Date of Patent: February 11, 2014Assignee: Komatsu Ltd.Inventor: Atsushi Shirao
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Patent number: 7950749Abstract: In a vehicle control apparatus, a hybrid ECU automatically stops and starts an engine if a predetermined condition is met while the vehicle is stopped. A brake ECU controls the braking force applied to wheels. A hybrid ECU controls the brake ECU so that braking force is applied to the wheels at the time of startup of the engine if while the vehicle is stopped, the vehicle run position is not selected as a shift position of the transmission. This restrains vibration of the vehicle at the time of startup of the engine.Type: GrantFiled: February 22, 2007Date of Patent: May 31, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Sakai
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Patent number: 7828394Abstract: In response to detection of a slip-down of a vehicle under restriction of a motor torque Tm*, which is required for a drive shaft linked with drive wheels, due to the occurrence of a slip caused by spin of the drive wheels on an ending slope, the technique of the invention multiplies a torque insufficiency by a ratio (reflection ratio ?) specified according to a vehicle speed V in a t direction, so as to set a brake tourgue Tb*. The torque insufficiency corresponds to a difference between the restricted motor torque Tm* and a balancing torque Tgrad corresponding to a road surface gradient set according to the relation between an acceleration of the vehicle and a torque output to the drive shaft The setting of the brake torque Tb* makes the velocity of the slip-down of the vehicle approach to a preset vehicle speed. The brake torque Tb* is applied by hydraulic brakes attached to driven wheels which am different from the drive wheels.Type: GrantFiled: July 26, 2004Date of Patent: November 9, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Hommi
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Patent number: 7798577Abstract: Apparatus including a brake control assembly having a brake fluid accumulator assembly. The brake fluid accumulator assembly includes a brake fluid orifice, at least one brake-fluid-accumulating piston bore, a controllable bi-directional motor, and at least one piston. The brake fluid orifice is fluidly connectable to a brake apply master cylinder and is fluidly connectable to a wheel brake. The at-least-one brake-fluid-accumulating piston bore is fluidly connected to the brake fluid orifice. The motor has a first motor driving direction and an opposite second motor driving direction. The at-least-one piston is each positioned in and slidable within a corresponding brake-fluid-accumulating piston bore and is each movable by the motor, in the first motor driving direction, to move in compression within the corresponding brake-fluid-accumulating piston bore.Type: GrantFiled: February 13, 2007Date of Patent: September 21, 2010Inventors: James R. Bond, Daniel N. Borgemenke, Matthew A. Cukovecki, Earl Wayne Lloyd, Jerry L. Newton
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Patent number: 7575089Abstract: A front steering gear (18) is connected with steerable front wheels (12 and 14) of a vehicle (10). A rear steering gear (28) is connected with steerable rear wheels (30 and 32) of the vehicle (10). A torque sensor (40) connected with a steering wheel (16) provides an output to a controller (42). The controller (42) effects operation of the rear steering gear (28) in response to an output of the torque sensor (40) corresponding to manual application of at least a predetermined force to the steering wheel (16). Alternatively or in addition, the controller (42) may effect operation of a rear wheel brake (50 or 52) which is disposed on a radially inner side of a turn in response to the output from the torque sensor (40).Type: GrantFiled: December 2, 2005Date of Patent: August 18, 2009Assignee: TRW Automotive U.S. LLCInventor: Kenneth A. Sherwin
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Patent number: 7377600Abstract: A turning behavior control device for vehicle has a left and right wheel driving force adjustment mechanism for adjusting a difference in driving force between rear wheels, a braking force adjustment mechanism for adjusting a difference in braking force between the wheels, a vehicle velocity sensor, a steering wheel sensor and a yaw rate sensor for detecting the behavior of the vehicle, and a control unit for controlling the left and right wheel driving force adjustment mechanism and the braking force adjustment mechanism, based on the vehicle velocity, the steering angle and the yaw rate detected by the sensors, and changing at least one of the left and right driving force control amount of the left and right wheel driving force adjustment mechanism and the braking force control amount of the braking force adjustment mechanism.Type: GrantFiled: October 24, 2005Date of Patent: May 27, 2008Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventor: Sumio Motoyama
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Patent number: 7241249Abstract: In a driving condition control system, a sensing unit is configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A correcting unit is configured to correct the torque according to the sensed first and second physical quantities of the rotations of the first and second rotational axle assemblies. This allows the torque to be precisely obtained.Type: GrantFiled: June 17, 2004Date of Patent: July 10, 2007Assignee: DENSO CORPORATIONInventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Patent number: 7165818Abstract: In a vehicle attitude control system of an automotive vehicle employing a pump-and-motor assembly, and a hydraulic actuator that regulates fluid pressures in wheel-brake cylinders of road wheels of the vehicle, independently of each other, a control unit is electronically connected to at least a motor of the pump-and-motor assembly and the hydraulic actuator, for executing vehicle attitude control by controlling a discharge pressure of the motor-driven pump and by controlling the fluid pressures in the wheel-brake cylinders to respective desired fluid pressures independently of each other. A processing unit of the control unit is programmed to determine a duty ratio of a drive signal of the motor, based on the desired fluid pressure of at least one of the wheel-brake cylinders.Type: GrantFiled: August 18, 2004Date of Patent: January 23, 2007Assignee: Hitachi, Ltd.Inventors: Katsuya Iwasaki, Kotaro Koyama, Jun Kubo
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Publication number: 20040130208Abstract: The invention relates to a torque control system which is dependent on wheel load in a drive mechanism for crane crabs, preferably machinery house crabs of container crabs, consisting of a drive mechanism, crab wheels, craneways and transfer elements. Said control system is characterized in that the wheel load of each wheel is determined and the torque of the drive mechanism for the wheel concerned is adjusted in such a way that there is sufficient static friction between the wheel and its running surface. The inventive solution has the advantage that there is always sullicient torque without slipping on the driven wheel, even in the case of swinging loads and low friction values between the wheels of the crab and the rail.Type: ApplicationFiled: January 23, 2004Publication date: July 8, 2004Inventors: Conrad Muller, Otto Adalbert Maria Kneuer
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Patent number: 6755488Abstract: A vehicle brakes traction control system and method of operation, for a vehicle having a drive axle with a differential operable between wheels at the two ends of the axle, and brakes for each respective wheel operable by a brake controller. The traction control system includes wheel speed sensors sensing the rotational speed of the wheels, an engine torque demand sensor and an engine torque output monitor. The brake system controller receives signals from the wheel speed sensors, the engine torque demand sensor and the engine torque output monitor to apply the brakes to equalize the rotational speed of the wheels if the engine torque output is less than a desired torque output for a given torque demand.Type: GrantFiled: June 19, 2002Date of Patent: June 29, 2004Assignee: Land RoverInventors: Paul Antony Fawkes, Simon Michael Dunning
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Publication number: 20030214181Abstract: A traction control system including engine intervention and brake intervention, during a start under &mgr;-split conditions the engine torque is increased compared to the driver input to accelerate vehicles as under high friction conditions, the vehicle acceleration under high friction conditions is determined, and engine torque is further increased by the brake torque applied to the low-&mgr; wheel.Type: ApplicationFiled: March 27, 2003Publication date: November 20, 2003Inventor: Norbert Polzin
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Patent number: 6536408Abstract: An engine brake control system that is integrated with service brakes for a diesel engine powered vehicle. Three manually selectable modes of operation include an operation with the engine brake control system disabled, an operation with engine braking activated by a zero throttle application and engine braking power level determined by manually actuated dashboard switches or the like, and an operation with engine braking activated by a brake pedal and engine brake power level being proportional to brake pedal displacement and limited by the manually actuated dash-mounted switches or the like.Type: GrantFiled: October 9, 2001Date of Patent: March 25, 2003Assignee: Detroit Diesel CorporationInventor: Oliver A. Warner
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Patent number: 6428118Abstract: An arrangement for avoiding rollovers when accelerating motor vehicles, single-track or double-track vehicles such as motorcycles or passenger cars in particular, with an arrangement for comparing a difference in rotational speed between the speed of at least one front wheel or the front axle and the speed of at least one rear wheel or the rear axle of the motor vehicle with an adjustable rotational speed difference threshold value. Also included is an arrangement for detecting a wheel acceleration for at least one front wheel and for at least one rear wheel and an arrangement for activating the vehicle's propulsion system when the rotational speed difference threshold value is reached or exceeded if the wheel acceleration is simultaneously negative for at least one front wheel and positive for at least one rear wheel.Type: GrantFiled: September 29, 1999Date of Patent: August 6, 2002Assignee: Robert Bosch GmbHInventor: Georg Blosch
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Patent number: 6357839Abstract: The present invention describes a coordination device for nominal values for the brake and/or the engine. The arrangement is based on a system wherein various components contribute to controlling the longitudinal dynamics of a vehicle. According to the present invention, these components generate in parallel to each other intermediate nominal values for the brake and/or the engine. According to the intermediate nominal values prevailing, coordination devices generate engine or brake nominal values which are sent to the corresponding components.Type: GrantFiled: October 29, 1999Date of Patent: March 19, 2002Assignee: Continential Teves AG & Co.Inventor: Alfred Eckert
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Patent number: 6321154Abstract: In a method and an apparatus for drive slip control, a switchover is made in the initial vehicle movement (drive-off) range from slip control to reference engine speed control. Additionally or alternatively, a braking intervention is performed, the braking force being controlled (in closed loop) only at the wheel which first exhibits slip, and the braking force control being accomplished in such a way that the other wheel runs in substantially stable fashion.Type: GrantFiled: August 18, 1999Date of Patent: November 20, 2001Assignee: Robert Bosch GmbHInventors: Johannes Schmitt, Andreas Zoebele
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Patent number: 6253141Abstract: A controller for an electric brake system in a vehicle. The brake system utilizes switched reluctance electric motors to apply braking force to wheels. Such motors have non-ideal torque-speed characteristics, wherein excessive amounts of time and current are required to change torque delivered. The invention reduces the times, and currents, by adjusting the phase angle, and durations, of current pulses delivered to the coils of the motor. The adjustment is based on several parameters, including presently demanded torque, speed of the electric motor, deviation of vehicle system voltage from a norm, and deviation of motor temperature from a norm.Type: GrantFiled: May 23, 2000Date of Patent: June 26, 2001Assignee: Valeo Electrical Systems, Inc.Inventor: Roy A. McCann
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Patent number: 6244673Abstract: A method and a device are described for traction control in a motor vehicle that is equipped with an anti-lock system. When the brake pedal is depressed and an unallowable slip occurs on at least one driving wheel, the brake pressure built up by the driver is controlled in the wheel brake associated with this wheel by setting the associated valve arrangement for traction control. This brake pressure control only takes place if at least one of the following criteria is met: the driver has actuated an additional switching element, the vehicle speed is less than a predefined threshold value, a predefined time period has not elapsed, and/or the gas pedal has been depressed.Type: GrantFiled: January 22, 1999Date of Patent: June 12, 2001Assignee: Robert Bosch GmbHInventors: Werner Konrad, Andreas Ziegler
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Patent number: 5850887Abstract: An acceleration slip control system for a motor vehicle operates so that a request for the upshift of the transmission of the motor vehicle is not output to upshift device in accordance with a road surface condition detected by road-surface condition detection device, on the basis of the detection results of engine revolution-speed detection device and driving-wheel slip detection device, whereby the inferior acceleration of the motor vehicle attributed to the upshift is prevented in order to perform the optimum gear-shift control conforming to the road surface condition.Type: GrantFiled: December 9, 1996Date of Patent: December 22, 1998Assignee: Toyota Jidosha Kabushiki KaishaInventors: Seiichi Nakashima, Kenji Sasahara
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Patent number: 5700073Abstract: A braking force control system and method of a vehicle comprises an estimated yaw rate calculating section for calculating an estimated yaw rate on a road surface having low friction coefficient, a target yaw rate differential calculating section for calculating a target yaw rate differential, an estimated yaw rate differential calculating section for calculating an estimated yaw rate differential, a yaw rate differential deviation calculating section for calculating a deviation of the both differentials, a first target braking force calculating section for calculating a first target braking force, a yaw rate deviation calculating section for calculating a deviation of an actual yaw rate and a target yaw rate, a second target braking force calculating section for calculating a second target braking force, a final target braking force calculating section for calculating a final target braking force based on the first and second target braking forces.Type: GrantFiled: July 23, 1996Date of Patent: December 23, 1997Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Yutaka Hiwatashi, Koji Matsuno, Akira Takahashi, Munenori Matsuura
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Patent number: 5696683Abstract: In order to optimize control of drive slip, the torque demand of the drive is determined continuously taking into account the interfering torques acting on the vehicle, and the drive torque is reduced to this torque demand when instability occurs.Type: GrantFiled: October 23, 1995Date of Patent: December 9, 1997Assignee: Robert Bosch GmbHInventors: Jochen Schafer, Thomas Sauter
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Patent number: 5630480Abstract: An acceleration slip control system for a motor vehicle, comprising a "fuel-cut number" alteration restraint device (in FIG. 1) for restraining the alteration of the number of those cylinders of the engine of the motor vehicle to which fuel is to be cut off. When the fluctuating magnitude of the reduction of the torque of the engine as based on an actual engine torque and a target engine torque falls within a predetermined range which can be coped with by a brake control, the "fuel-cut number" alteration restraint device inhibits the alteration of the "fuel-cut number". Thus, frequence in the change of the "fuel-cut number" is lowered to prevent the temperature rise of a catalyst which is mounted in the motor vehicle.Type: GrantFiled: July 25, 1995Date of Patent: May 20, 1997Assignee: Toyota Jidosha Kabushiki KaishaInventor: Hirohito Nishikata
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Patent number: 5573315Abstract: An ASR is described which actuates the brakes in the case of spin. A maximum braking torque which depends on the drive torque is specified here in order to prevent strangling of the engine by the ASR operation.Type: GrantFiled: June 30, 1995Date of Patent: November 12, 1996Assignee: Robert Bosch GmbHInventors: Johannes Schmitt, Ralf Donath