Class / Patent application number | Description | Number of patent applications / Date published |
701084000 | Control of engine torque | 36 |
20080228369 | ACCELERATOR/BRAKE PEDAL MANAGEMENT FOR TORQUE-BASED ENGINE CONTROL - A method and system for regulating a drive torque provided to a driveline of a vehicle includes monitoring an accelerator pedal position and a brake pedal position. An adjusted accelerator pedal position is determined based on the accelerator pedal position and the brake pedal position and a drive torque request is determined based on the adjusted accelerator pedal position. Drive torque is generated based on the drive torque request. | 09-18-2008 |
20090037066 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - A driving force control system includes an internal combustion engine model ( | 02-05-2009 |
20090093937 | TORGUE CONTROL METHOD OF A ROAD VEHICLE - A control method of the torque of a road vehicle having a powertrain system provided with an engine and a driveline which transmits the torque generated by the engine to the road surface; the method contemplates the steps of: determining a target torque; modeling the powertrain system as a single physical component which presents a characteristic mechanical inertia and a characteristic torsional elasticity; determining a current load torque of the vehicle; determining a target torsion of the powertrain system according to the target torque and the current load torque; determining a current torsion of the powertrain system and a current torsion speed of the powertrain system; determining a requested torque on the basis of the energy balance according to the target torsion, the current torsion, the current torsion speed, and the current load torque; and using the requested torque on the basis of the energy balance to control the torque generation of the engine. | 04-09-2009 |
20090112437 | Traction Control for Performance and Demonstration Spin - A method is provided for controlling a powertrain of a vehicle comprising wheels, and an accelerator pedal actuated by a driver. A method comprises controlling wheel slip to a first amount during a first road condition, the first amount independent of a driver requested output; and controlling the wheel slip to a second amount during a second road condition, the second amount based on the driver requested output, the second road condition having higher friction than the first road condition. | 04-30-2009 |
20090210128 | SLIP RATIO ESTIMATING DEVICE AND SLIP RATIO CONTROL DEVICE - The present invention provides a slip rate estimating device measuring a slip ratio without the need for a body speed and a slip ratio control device using the slip ratio estimating device. A motor torque measured by a torque measuring instrument is input to each of a vehicle model ( | 08-20-2009 |
20090240415 | Integrated Engine Torque Model - A method of operating a vehicle having at least a driven wheel, the driven wheel driven at least by a driving torque, includes maintaining an inclination angle of the vehicle in memory during a vehicle off condition; after starting the vehicle from the vehicle off condition, first updating a vehicle mass based on operating conditions including vehicle traveling conditions; and after updating the vehicle mass, updating the inclination angle based on operating parameters including vehicle traveling conditions. | 09-24-2009 |
20090292435 | SECURITY FOR ENGINE TORQUE INPUT AIR-PER-CYLINDER CALCULATIONS - An air-per-cylinder (APC) security system for a vehicle comprises an APC determination module, an APC threshold determination module, and an APC diagnostic module. The APC determination module determines first and second APC values for first and second cylinders of an engine, respectively, based on mass airflow (MAF) into the engine. The APC threshold determination module determines an APC threshold based on the first APC value and a spark timing for the first cylinder. The APC diagnostic module selectively diagnoses a fault in the APC determination module when the second APC value is greater than a sum of the first APC value and the APC threshold. | 11-26-2009 |
20090326778 | Torque Modulation Control of a Hybrid Electric Vehicle - In a powertrain for motor vehicle that includes an engine, a first electric machine and a second electric machine, each machine being able to function alternately as a motor and a generator, a transmission having an input driveably connected to the engine and the first electric machine and a transmission output driveably connected to the second electric machine and wheels of the vehicle, a method for controlling the powertrain includes using the engine to produce wheel torque, performing a gear shift using the transmission, if a reduction in powertrain output torque is to occur while modulating torque during the gear shift, operating one of the first electric machine and the second machine as an electric generator to reduce the powertrain output torque, and if an increase in powertrain output torque is to occur while modulating torque during the gear shift, operating one of the first electric machine and the second machine as an electric motor to increase the powertrain output torque. | 12-31-2009 |
20100076660 | VEHICLE TRACTION CONTROL SYSTEM - A traction control system that combines torque sensors with wheel speed sensors and a transmission gear with vehicle speed to help sustain maximum traction. The torque sensors generate torque value as output and the speed sensors detect the wheel speed with respect to each wheel of the vehicle. An electronic control module can be utilized to detect traction loss by analyzing the torque and the speed signals and recording the applied torque value when the traction is lost. The torque value can then be limited to a value that is immediately below the recorded torque value in order to prevent further traction loss. The system monitors traction until the speed attains a steady state in order to allow maximum torque and, therefore, maximum acceleration. | 03-25-2010 |
20100076661 | VEHICULAR CONTROL DEVICE, METHOD OF CONTROLLING A VEHICLE, AND STORAGE MEDIUM HAVING STORED THEREIN A PROGRAM THAT IMPLEMENTS THE METHOD - An ECU executes a program including the steps of: if brake hold control is currently exerted, setting at zero a controlled value of a degree of operation of an accelerator pedal used as a controlled value of a degree of a request made by a driver for acceleration, to control a force output to drive the vehicle; if an actual value of the degree of operation of the accelerator pedal serving as an actual value of the degree of the request made by the driver for acceleration is larger than a predetermined degree, determining that there is a request from the driver for acceleration; outputting a command to cancel the brake hold control; and converging the controlled value of the degree of operation of the accelerator pedal to the actual value of the degree of operation of the accelerator pedal. | 03-25-2010 |
20110106390 | METHOD FOR OPERATING A DRIVE TRAIN OF A VEHICLE AND DEVICE FOR CARRYING OUT THE METHOD - A method for operating a drive train of a vehicle comprising an internal combustion engine ( | 05-05-2011 |
20120116641 | DRIVE SYSTEM HAVING SLIP CONTROL - A drive system for a mobile machine is disclosed. The drive system may have a first traction device, a first motor connected to drive the first traction device, and a first sensor configured to generate a first signal indicative of a first rotational speed of the first traction device. The drive system may also have a second traction device, a second motor connected to drive the second traction device, and a second sensor configured to generate a second signal indicative of a second rotational speed of the second traction device. The drive system may further have a controller configured to make a first determination of a difference between the first rotational speed and the second rotational speed greater than a threshold difference based on the first and second signals, and to adjust a propelling torque of at least one of the first and second motors based on the first determination. | 05-10-2012 |
20120143455 | SYSTEM AND METHOD FOR PROTECTING DRIVE SHAFT - A method for protecting a drive shaft including determining whether a currently selected shift-speed may be a reverse speed, determining, in a case that the currently selected shift-speed may be the reverse speed, whether current steering angle may be full turn angle, determining, in a case that the current steering angle may be the full turn angle, whether stall condition may be satisfied, and controlling torque applied to the drive shaft to be smaller than limit torque by reducing output torque of an engine in a case that the stall condition may be satisfied may be disclosed. | 06-07-2012 |
20120197506 | CONTROL METHOD AND APPARATUS FOR A VEHICLE - In an aspect of the invention there is provided a control method for a vehicle travelling on a surface, the vehicle having a vehicle powertrain for generating and delivering power to the vehicle wheels, the method including: measuring one or more parameters associated with motion of the vehicle on the surface; comparing the or each of the measured parameters with a predetermined threshold for said measured parameter that is indicative of a level at which wheel slip of the vehicle may occur; and in circumstances in which one or more of the measured parameters exceeds the predetermined threshold, controlling the torque applied by the powertrain to the vehicle wheels to prevent wheel slip. | 08-02-2012 |
20130073166 | METHOD FOR DETECTING A BURNOUT STATE DURING WHICH DRIVEN WHEELS ARE CAUSED TO SPIN - A method for detecting a burnout state during which driven wheels of a motor vehicle are caused to spin is provided. The method includes detecting a rotational wheel speed of a first driven wheel and a rotational wheel speed of a second driven wheel and comparing the rotational wheel speed of the faster turning wheel with a first constant. A vehicle speed is detected and compared with a second constant. An engine rotational speed is detected and compared with a third constant. The burnout state is detected when the rotational wheel speed of the faster turning wheel is greater than the first constant, the vehicle speed is less than the second constant, and the engine rotational speed is greater than the third constant. | 03-21-2013 |
20130103282 | SYSTEM AND METHOD OF CONTROLLING MOTOR VEHICLE OPERATION - The present disclosure provides a system and a method of controlling motor vehicle operation. The method may include: setting a creep torque as a minimum torque; setting a maximum torque as a sum of a maximum torque of an engine and a maximum torque of a motor; monitoring an acceleration pedal position sensor (APS) value; calculating a demand torque according to the APS value; setting a filter coefficient for filtering the demand torque according to an operating condition of the vehicle; and filtering the demand torque by means of the filter coefficient. | 04-25-2013 |
20130138318 | SYSTEMS AND METHODS FOR DETERMINING ROAD MU AND DRIVE FORCE - The vehicle described herein employs a mu logic module. The mu logic module monitors vehicle operating conditions, and based on those operating conditions determines a road surface mu in response to a wheel slip event. The road surface mu is then used to determine a drive force to minimize or control the wheel slip event. The mu logic module continually monitors and adjusts the drive force provided to at least one of the wheels to maximize the applied drive force, while stabilizing and controlling wheel slip events to ensure safe operation of a vehicle. | 05-30-2013 |
20130245911 | VEHICLE CONTROLLER AND METHOD FOR CONTROLLING VEHICLE - A vehicle controller includes a wheel speed sensor, a skid sensor, an upper limit calculator, and a motive power controller. The wheel speed sensor is configured to detect rotational speed of driving wheels. The skid sensor is configured to determine whether or not the driving wheels are skidding based on an output of the wheel speed sensor. The upper limit calculator is configured to calculate an upper limit of rotational speed of the driving wheels if the skid sensor determines that the driving wheels are skidding. The motive power controller is configured to control motive power output from the driving source so that rotational speed of the driving wheels is equal to or smaller than the upper limit calculated by the upper limit calculator. | 09-19-2013 |
20140046568 | TORQUE DISTRIBUTION APPARATUS, TORQUE DISTRIBUTION METHOD, TORQUE DISTRIBUTION VALUE GENERATION METHOD, AND PROGRAM - A torque distribution apparatus includes an instructed torque acquiring unit that acquires input instructed torque, a determining unit that determines whether to perform power running control or regenerative braking, an efficiency map acquiring unit that based on a determination result, acquires a motor efficiency map, a vehicular speed detecting unit, a drive wheel rotational speed detecting, a slip rate calculating unit that calculates slip rate at drive wheels, a calculating unit that based on the slip rate, creates an efficiency variation expression that indicates efficiency values on a performance curve that indicates relations between drive wheel rotational speed and torque, a distributing unit that calculates based on the slip rate, the instructed torque, and the torque optimizing efficiency, torque distribution values such that overall efficiency during power running and during regeneration are maximized, and a control unit that controls torque distribution to the motors. | 02-13-2014 |
20140156162 | Measuring and Displaying Tractor Performance - A method of measuring and displaying track-type tractor performance in real time calculates both a measure of work performance and a theoretical optimum work performance for a given input state, such as track speed. After estimating soil conditions, the theoretical optimum is estimated using an iterative technique. The optimum and current performance are normalized and displayed using a first bar representing a full range of work performance, a second bar depicting a range of optimum performance for current conditions is presented overlying the first bar, and an indicator line showing the current performance. This allows an operator to adjust speed or load accordingly. A coefficient of traction and a shear modulus adjustment, reflecting soil conditions, are calculated at the tractor during operation and used to offset a table of ideal condition operating points to produce the second bar. | 06-05-2014 |
20140222308 | VEHICLE TRACTION CONTROL - A method for controlling wheel slip comprising determining an actual wheel slip of a set of driven wheels on a vehicle, adjusting the actual wheel slip for cornering distortion, setting a target slip condition using a traction control unit with a multi-position switch depending upon road conditions, calculating overslip of the wheels, and retarding an engine output to minimize overslip, and an apparatus for accomplishing same. | 08-07-2014 |
20140365098 | SYSTEM AND METHOD FOR CONTROLLING AT LEAST ONE OF TRACTIVE OR BRAKING EFFORTS OF A VEHICLE SYSTEM - System including an effort-monitoring system configured to control tractive efforts (TEs) individually produced by propulsion-generating vehicles in a vehicle system. The effort-monitoring system is configured to control each of the propulsion-generating vehicles to provide a respective prescribed TE. The vehicle system operates at a system TE when each of the propulsion-generating vehicles is providing the respective prescribed TE. The prescribed TEs are determined by at least one of an operating plan of the vehicle system or a regulation that limits TE or ground speed of the vehicle system. In response to determining that a first propulsion-generating vehicle is providing a reduced TE that is less than the prescribed TE of the first propulsion-generating vehicle, the effort-monitoring system is configured to control a second propulsion-generating vehicle to exceed the prescribed TE of the second propulsion-generating vehicle so that the vehicle system is operating at or below the system TE. | 12-11-2014 |
20150073679 | VEHICLE CONTROL SYSTEM AND METHOD FOR SWITCHING BETWEEN POWERTRAIN CONTROL FUNCTIONS - A system and method for use with a vehicle to provide a vehicle launch assist (VLA) function that reduces wheel slip at lower speeds and to provide a fraction control (TC) function that reduces wheel slip at higher speeds. Each function affects operation of one or more vehicle subsystems that control at least one powertrain parameter. The VLA and TC functions operate in response to a driver accelerator request to generate a drive signal that controls torque delivered to at least one driven vehicle wheel. The VLA function generates the drive signal at a first value that limits the torque to below a requested torque value representing the driver accelerator request. The TC function generates the drive signal at a second value that limits the torque to below the requested torque value. And the control system outputs a powertrain drive signal based on the lesser of first and second values. | 03-12-2015 |
20150105991 | METHOD AND APPARATUS FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE OF A MOTOR VEHICLE - A method for controlling an internal combustion engine of a motor vehicle includes detecting a driving situation of the motor vehicle and determining a setpoint torque (M2) based on the detected driving situation. An expected driving situation of the motor vehicle is ascertained and a torque reserve is determined based on the ascertained expected driving situation of the motor vehicle. The setpoint torque (M2) is set by setting an ignition angle of the internal combustion engine, and the torque reserve (MR) is set by setting a pressure of a gas mixture that flows into the internal combustion engine. | 04-16-2015 |
20150149057 | SYSTEM AND METHOD FOR PROTECTING DRIVE SHAFT - A system and method for protecting a drive shaft that include a vehicle state detector configured to detect vehicle information including currently selected shift speed, hydraulic pressure signal detected by a hydraulic pressure detector mounted to a hydraulic pressure power steering assembly, vehicle speed, and engine RPM. In addition, a traction controller is configured to analyze the vehicle information delivered from the vehicle state detector and request reduction of torque when a predetermined condition is satisfied. An engine controller is configured to reduce output torque of an engine based on torque reduction requested by the traction controller to cause the torque applied to the drive shaft to be less than a limit torque. | 05-28-2015 |
20160082966 | WORK VEHICLE AND METHOD OF CONTROLLING WORK VEHICLE - A work vehicle includes a variable displacement hydraulic pump driven by an engine, a hydraulic motor forming a closed circuit with the pump and driven by hydraulic fluid discharged from the pump, wheels driven by the motor to allow the work vehicle to travel, a selector detecting an operating state of a switch switching the traveling of the work vehicle between forward and backward, and a controller. When the selector detects a reversal operation of the switch to reverse the traveling direction when the work vehicle travels, the controller sets relationship between the vehicle speed of the work vehicle and the upper limit of the rotational speed of the engine such that the upper limit increases as the absolute value of the vehicle speed approaches zero. The controller obtains an upper limit of the rotational speed from the relationship and a vehicle speed of the work vehicle. | 03-24-2016 |
20160082972 | VEHICLE TRACTION CONTROL - A method of setting a vehicle in motion over a driving surface and/or maintaining motion of said vehicle over the driving surface implemented by a control system, said method comprising initiating motion control, initiating motion control comprising: commanding by the control system application of brake torque and drive torque to one or more wheels such that the vehicle is held stationary; subsequently initiating motion from rest whilst brake torque continues to be applied to the one or more wheels. The strategy may also be implemented to maintain vehicle progress on low friction surfaces. The vehicle driver may be commanded to vary a control input, such as accelerator pedal position, in order to facilitate the maintaining of progress. | 03-24-2016 |
701085000 | Having throttle valve positioning | 6 |
20090240416 | Traction Control System Using Torque Sensor For Adaptive Engine Throttle Control - A system and method using a vehicle drive shaft torque coupled to a driven wheel and a non-driven wheel speed for a vehicle throttle control system includes reading first and second torque values generated by the torque sensor The method identifies when a sustained drop occurs between the first and second torque values. Another step determines if a change occurred between the first and second torque value readings in any of: a throttle position; a gear setting; and a brake pressure. A detected traction loss is signaled when the sustained drop occurred with no change between the first and second torque value readings in the throttle position, gear setting, and brake pressure. A desired throttle value is calculated using an engine torque and a target engine speed to prevent driven wheel slip. A throttle command signal changes an existing throttle value to the desired throttle value. | 09-24-2009 |
20110160977 | Control System in Vehicle and Method of Controlling Vehicle - A control system in a vehicle configured to rotate a drive wheel by a driving power generated in a driving power source mounted in the vehicle; comprises a slip value measuring unit configured to measure a slip value indicating a degree to which the drive wheel spins; a change rate calculator configured to calculate a change rate of the slip value measured by the slip value measuring unit; and a road surface condition determiner configured to determine a road surface condition according to the change rate of the slip value calculated by the change rate calculator. | 06-30-2011 |
20120245818 | TRACTION CONTROLLING APPARATUS - A traction controlling apparatus is configured such that if a slip of a driving wheel is detected, then a throttle valve opening is reduced to a first predetermined value. If failure is detected while the throttle valve opening is reduced to the first predetermined value, then the throttle valve opening is further reduced to a second predetermined value. If the acceleration grip is manipulated to a fully closed position while the throttle valve opening is reduced to the second predetermined value, then the control is ended and throttle control by a direct manipulation of the acceleration grip is enabled. | 09-27-2012 |
20120253626 | MOTORCYCLE - A vehicle can include an anti-slip device configured to detect front and rear wheel speeds at a time of acceleration, and to compute a slip factor from a speed difference. When the slip factor has exceeded the first threshold, a throttle valve is closed so as to lower an engine output. An informing unit and a preliminarily notifying unit are configured to inform the driver when a slip factor has exceeded or is expected to exceed first and second thresholds. | 10-04-2012 |
20130090829 | Traction Control System Using Torque Sensor For Adaptive Engine Throttle Control - A system and method using a vehicle drive shaft torque coupled to a driven wheel and a non-driven wheel speed for a vehicle throttle control system includes reading first and second torque values generated by the torque sensor. The method identifies when a sustained drop occurs between the first and second torque values. Another step determines if a change occurred between the first and second torque value readings in any of: a throttle position; a gear setting; and a brake pressure. A detected traction loss is signaled when the sustained drop occurred with no change between the first and second torque value readings in the throttle position, gear setting, and brake pressure. A desired throttle value is calculated using an engine torque and a target engine speed to prevent driven wheel slip. A throttle command signal changes an existing throttle value to the desired throttle value. | 04-11-2013 |
20130261925 | TRACTION CONTROL DEVICE AND METHOD FOR A MOTORCYCLE - A traction control device for a motorcycle eliminates a need for a waiting time for detecting an amount of change in a vehicle state and a subsequent prediction time, and can execute quick traction control. The traction control device includes an engine driving force control unit, for calculating a real slip ratio of the motorcycle, setting a target slip ratio according to a driving state of the motorcycle, and controlling a driving force of an engine so that the real slip ratio becomes the target slip ratio. The traction control device also includes a throttle grip opening degree sensor for detecting an opening degree of a throttle grip; and a bank angle sensor for detecting a bank angle of the motorcycle. The engine driving force control unit calculates the target slip ratio on a basis of the throttle opening degree and the bank angle of the motorcycle. | 10-03-2013 |
701086000 | Having fuel cutting or ignition timing retarding | 3 |
20090319146 | TRACTION CONTROL SYSTEM FOR DIESEL POWERED VEHICLES - The present invention provides an improved traction control system which can be advantageously applied to a vehicle which does not employ a spark ignition engine, such as a vehicle powered by a diesel engine. In an embodiment of the invention, a traction control unit (TCU) and a digital potentiometer are interfaced between the wheel speed sensors and the vehicle ECU. The traction control unit senses wheel, the traction control unit causes the digital potentiometer to decrement the throttle position sensor voltage read by the ECU, which in turn reduces the fuel flow through the fuel injector. The reduction in fuel flow reduces the wheel speed and/or wheel torque thereby allowing the slipping wheels to regain traction. When traction is regained, the traction control unit causes the digital potentiometer to begin incrementing the throttle position sensor voltage back up to its standard voltage, determined by the current throttle position, thereby causing the ECU to increase the fuel flow through the fuel injector to the standard level for the current throttle position. | 12-24-2009 |
20090326779 | Slip Suppression Control System for Vehicle - A slip suppression control system for a vehicle, includes a controller configured to execute traction control for reducing a driving power of a drive wheel when a predetermined start condition is satisfied, and an ON/OFF input device which is configured to switch between a permission state in which the traction control is enabled and an inhibiting state in which the traction control is disenabled. The controller is configured to restrict switching from the permission state to the inhibiting state, in response to a command for switching from the permission state to the inhibiting state which is input to the ON/OFF input device, when a first condition including a condition that the traction control is being executed is satisfied. | 12-31-2009 |
20100138130 | Tire Driving Optimization System and Control Method Thereof - The tire driving optimization system may include a first tire that is disposed at one side of a vehicle to transmit driving torque from an engine to a road surface, a second tire that is disposed at the other side of the vehicle to transmit driving torque from the engine to a road surface, an accelerator pedal that is operated by a driver so as to control a fuel injection amount that is injected into the engine, and a control portion configured to determine a first consumption energy value that is consumed through the first tire and a second consumption energy value that is consumed through the second tire, and to adjust engine output based on the first consumption energy value and the second consumption energy value if the vehicle is unstable. | 06-03-2010 |