Class / Patent application number | Description | Number of patent applications / Date published |
477110000 | Responsive to transmission output condition | 20 |
20080287255 | CONTROL ARCHITECTURE AND METHOD TO EVALUATE ENGINE OFF OPERATION OF A HYBRID POWERTRAIN SYSTEM OPERATING IN A CONTINUOUSLY VARIABLE MODE - There is provided a method and apparatus to determine operating conditions for a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween. The method comprises determining a torque output and an operating cost for operating the first and second electrical machines of the hybrid transmission effective to meet an operator torque request when the engine is operating in an engine-off operating state. Determining the torque output for operating the first and second electrical machines comprises executing a predetermined system equation effective to determine motor torque outputs from each of the first and second electrical machines based upon the selected parametric value for the input torque and the operator torque request. | 11-20-2008 |
20080293541 | SYSTEM AND METHOD FOR SELECTING A TRANSMISSION GEAR RATIO - An automatic transmission control system includes a shift map that includes predetermined ranges of vehicle speeds at which vehicle engine speeds require gear shifts for the automatic transmission based on requests for torque. The predetermined ranges include upper bounds that correspond to gear upshifts and lower bounds that correspond to gear down shifts. A shift map control module varies at least one of the predetermined ranges of vehicle speeds based on at least one vehicle condition that affects movement of the vehicle. | 11-27-2008 |
20080312035 | VEHICLE ENGINE CONTROL APPARATUS - A vehicle engine control apparatus provides rotational speed synchronization control during a shift operation. A shift operation detecting component detects a shift position resulting from a manual shift operation of a manual transmission connected to an engine. A vehicle speed detecting component detects a vehicle speed. The computing component computes an input side transmission rotational speed value based on the vehicle speed and a gear ratio. A driving intent determining component determines a driver's driving intention. A rotational speed synchronization control component performs rotational speed synchronization based on a first target engine rotational speed value that is smaller than the input side transmission rotational speed value when a clutch is disconnected and a deceleration intention exists by the driver, and based on a second target engine rotational speed value that is equal to the input side transmission rotational speed value when the clutch is disconnected without the deceleration intention. | 12-18-2008 |
20090118093 | CONTROL SYSTEM FOR ENGINE TORQUE MANAGEMENT FOR A HYBRID POWERTRAIN SYSTEM - An engine is mechanically coupled to a transmission device, the transmission device operative to transfer mechanical power between the engine and a second power generating device and an output member. A method for controlling the engine includes monitoring an operator demand for power, selecting a preferred engine state, determining a preferred engine torque input to the transmission device when operating in the preferred engine state based upon the operator demand for power, determining constraints on the engine torque input to the transmission device based upon a capacity of the transmission device to react the engine torque input, and commanding operation of the engine to the preferred engine state and commanding the engine torque input to the transmission device based upon the preferred engine torque input and the constraints on the engine torque input. | 05-07-2009 |
20090118094 | METHOD FOR DETERMINING INPUT SPEED ACCELERATION LIMITS IN A HYBRID TRANSMISSION - A powertrain system includes a transmission operative to transfer power between an input member and first and second torque machines and an output member. The first and second torque machines are connected to an energy storage device and the transmission is operative in a continuously variable operating range state. A method for controlling the powertrain system includes selecting an independently controllable parameter for the powertrain system, determining maximum and minimum motor torque constraints for the first and second torque machines and determining maximum and minimum power constraints for the energy storage device, determining maximum and minimum states for the independently controllable parameter for the powertrain system, and determining an achievable operating range for a parameter of interest based upon the maximum and minimum states for the independently controllable parameter for the powertrain system, the maximum and minimum motor torque constraints for the first and second torque machines and the maximum and minimum power constraints for the energy storage device. | 05-07-2009 |
20090215586 | TRANSMISSION TURBINE ACCELERATION CONTROL FOR MANAGING VEHICLE ACCELERATION - Methods and systems for managing acceleration of a motor vehicle having an automatic transmission by controlling transmission turbine acceleration are provided. A desired transmission turbine acceleration is determined based on vehicle speed, turbine speed, and other information obtained from the vehicle transmission. One or more torque limits are determined as a function of the turbine acceleration. The torque limits are applied to manage acceleration of the vehicle. | 08-27-2009 |
20090291803 | Vehicle Propulsion Systems Using Motor/ Generator In Transmission For Powering Electric Supercharger - An automotive propulsion system includes an internal combustion engine ( | 11-26-2009 |
20090312147 | Vehicle and Controller Thereof - A vehicle comprises a driving state detecting device configured to detect a driving state, a command signal output device configured to output a detected command signal indicating an engine driving power change command, an opening degree signal output device configured to output a detected opening degree signal, a valve drive device configured to drive a throttle valve; and a controller which is configured to set a target opening degree of the throttle valve based on the detected command signal and to control the valve drive device to cause an opening degree to match the target opening degree. The controller is configured to set, according to the driving state, the target opening degree to a smaller value than when the command signal and the opening degree signal are normal, when at least one of the command signal and the opening degree signal is abnormal. | 12-17-2009 |
20100056332 | VEHICULAR CONTROL APPARATUS AND VEHICULAR CONTROL METHOD - When shifting an automatic transmission ( | 03-04-2010 |
20100075803 | SECURING THROTTLE AREA IN A COORDINATED TORQUE CONTROL SYSTEM - An engine system includes a throttle actuator module and a torque control module. The throttle actuator module controls a throttle actuator based on a desired throttle area. The torque control module determines an actuator torque. The torque control module determines a rate limited torque, a maximum torque, and a minimum torque based on the actuator torque and a predetermined rate of change. The torque control module determines the desired throttle area based on the actuator torque when the rate limited torque is greater than the maximum torque. The torque control module determines the desired throttle area based on the actuator torque when the rate limited torque is less than the minimum torque. | 03-25-2010 |
20110237391 | VEHICLE ENGINE SHUTDOWN PREVENTION SYSTEM - A vehicle engine shutdown prevention system with a position determination module and a blocking unit. The module is adapted to be connected to the transmission for determining if it is engaged in a position included in a first or a second group of positions, the second group including at least one position for which the vehicle remains stationary when the engine is shut down, and the first group including the remaining positions. The module emits a block signal when the transmission is engaged in one of the first group of positions. The blocking unit is adapted to define the only path through which a stop engine signal may circulate from the switch to the engine control unit. The blocking unit blocks the path between the switch and the engine control unit when it receives the block signal. | 09-29-2011 |
20110237392 | PRESSURE ACCUMULATION SYSTEM FOR INTERNAL COMBUSTION ENGINE - A pressure accumulation system for an internal combustion engine can prevent exhaust pressure from excessively increasing when pressurized gas is contained in a pressure accumulation container. A pressure accumulation system is applied for an internal combustion engine provided with an exhaust shut-off valve mounted in an exhaust path. The pressure accumulation system has a pressure accumulation tank into which gas can be introduced from that portion of an exhaust path. The pressure accumulation system also has a sensor for detecting the exhaust pressure, and an EGR valve is controlled based on the detection value from the exhaust gas sensor such that the pressure in that portion of the exhaust path which is on the upstream of the exhaust shut-off valve is limited below a predetermined exhaust gas upper limit value (Pmax) when gas is contained in the pressure accumulation tank. | 09-29-2011 |
20120035019 | METHOD AND APPARATUS TO DETECT A MODE-GEAR MISMATCH DURING OPERATION OF AN ELECTRO-MECHANICAL TRANSMISSION - A vehicular powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine. A method for operating the powertrain includes monitoring operator inputs, monitoring a transmission output, and terminating an engine operating mode when a time-rate change in the transmission output exceeds a threshold absent a change in the monitored operator inputs. | 02-09-2012 |
20120135839 | CONTROLLER OF VEHICLE AND CONTROL METHOD OF VEHICLE - A controller of a vehicle, provided with a coast stop control unit which automatically stops an engine during the travel of a vehicle if coast stop conditions are met during the travel of the vehicle, and the coast stop control unit automatically stops the engine at least if a change amount of acceleration of the vehicle caused by the automatic stop of the engine is predetermined acceleration or less. | 05-31-2012 |
20120220425 | METHOD OF CONTROLLING A CONTINUOUSLY VARIABLE TRANSMISSION - A method for controlling a continuously variable ratio transmission is described. The method may include controlling a continuously variable ratio unit (“variator”) having rotary input and output members through which the variator is coupled between an engine and a driven component, the variator receiving a primary control signal and being constructed and arranged to exert upon its input and output members torques which correspond directly to the control signal. The method may also include determining a target engine acceleration, determining settings of the variator's primary control signal and of an engine torque control for providing the required engine acceleration and adjusting the control signal and/or the engine torque control based on these settings, predicting a consequent engine speed change, allowing for engine and/or transmission characteristics, and correcting the settings of the control signal and engine torque based on a comparison of actual and predicted engine speeds. | 08-30-2012 |
20120270699 | System and Method to Prevent Shift Hunting in a Powertrain - A method for preventing shift hunting in a powertrain including an engine and a transmission having a variator, a first gearset, and a second gearset is disclosed. The method includes operating the engine at a first substantially constant speed, detecting a shift condition, and operating the engine at a second substantially constant speed as a function of detecting the shift condition. The second speed is different than the first speed. | 10-25-2012 |
20120309591 | HYDRAULIC CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - An accumulator ( | 12-06-2012 |
20130085036 | SYSTEM AND METHOD FOR REDUCED TRACK SLIPPAGE - An on-board system for providing traction control for a variable-load bearing vehicle having tracks subject to slippage is disclosed. The system includes a member(s) configured to be activated by an operator of the vehicle with an operator-to-vehicle interface or alternatively, automatic control without operator intervention, based only on measured actual vehicle tread speed, without obtaining actual vehicle speed. Member activation serves to control engine power level sufficient to reduce the slippage. Automatic control, after operator activation, is linked to at least one look-up table having predetermined power level values to provide the engine power level control, required to reduce the slippage. | 04-04-2013 |
20130116089 | Method and Device for Controlling a Coasting Operating Mode in a Motor Vehicle with an Internal Combustion Engine - A method and a device for automatically deactivating a coasting operating mode in a motor vehicle with an internal combustion engine is disclosed. An activated coasting operating mode is deactivated if the current vehicle speed exceeds a threshold value. The threshold value is set as the sum of a minimum vehicle speed and of a maximum permissible increase in speed. | 05-09-2013 |
20130288856 | TORQUE CONTROL SYSTEM - A method of controlling a machine includes receiving a torque demand associated with at least one of a first parasitic load and a second parasitic load. At least the first parasitic load receives power from a power source of the machine via a transmission coupled to the power source. The method also includes providing torque from the power source to the at least one of the first and second parasitic loads in response to receiving the torque demand. In such a method wherein torque is provided to the at least one of the first and second parasitic loads based on a torque priority value associated with the at least one of the first and second parasitic loads. In addition, the torque priority value is adjustable by an operator of the machine during operation of the machine. | 10-31-2013 |