Abstract:
A method/system for maintaining the energy efficiency history of predicted route segments in a database, providing adaptive feedback to hybrid vehicle controls, and displaying the energy efficiency history to the driver. As the vehicle travels on a route, the system stores energy efficiency information for route segments. The system may include sensors, a memory, and a processor to learn energy efficiency information based on how fuel and battery power are used over a route segment and/or route. The method/system may utilize energy efficiency information to adjust a start/stop engine threshold of a hybrid vehicle. When the processor predicts that the vehicle will travels on the predicted route segment again, the vehicle may optimize powertrain parameters such as the start/stop engine threshold during traveling on the predicted route segment and/or before reaching the predicted route segment.
Abstract:
A hybrid powertrain system includes a transmission device operative to transfer power between an input member, a torque machine and an output member, the output member coupled to a driveline coupled to a wheel to transfer tractive torque therebetween. A method for controlling the hybrid powertrain system includes monitoring an operator torque request, determining an operating range state of the transmission device, determining a net output torque to the output member based upon the operator torque request, determining a lash state of the driveline, and determining a command for transferring output torque to the output member based upon the operating range state of the transmission device, the net output torque, and the lash state of the driveline.
Abstract:
A method of controlling a pump supplying a fluid to a transmission includes sensing a requested power and an excess power for a powertrain. The requested power substantially meets the needs of the powertrain, while the excess power is not part of the requested power. The method includes sensing a triggering condition in response to the ability to convert the excess power into heat in the transmission, and determining that an operating temperature of the transmission is below a maximum. The method also includes determining a calibrated baseline and a dissipation command for the pump. The calibrated baseline command is configured to supply the fluid based upon the requested power, and the dissipation command is configured to supply additional fluid and consume the excess power with the pump. The method operates the pump at a combined command, which is equal to the calibrated baseline command plus the dissipation command.
Abstract:
A hybrid propulsion system for a vehicle and method of operation are described. In one example, the engine may operate in a two stroke cycle to provide increased engine torque when a recharging operation of the on-board energy storage device is requested. Further, a transition from a four stroke cycle to the two stroke cycle may be performed while maintaining the transmission in the previously selected gear ratio in response to a requested increase in charging or a requested increase in wheel torque as requested by the vehicle operator.
Abstract:
When a driver turns on an accelerator, a CPU permits revolution of planetary gears, and a motor rotates a ring gear to drive wheels. Then, when the driver turns off the accelerator, the CPU calculates a target RPM to be output by a Stirling engine according to a depression amount and a depression time of the accelerator. When the RPM output by the Stirling engine reaches close to the target RPM, the revolution of the planetary gears is inhibited, the operation of the motor is stopped, and the Stirling engine rotates the ring gear via a sun gear and the planetary gears to drive the wheels.
Abstract:
An internal combustion engine is fluidly connected to an exhaust aftertreatment system and operatively connected to an electro-mechanical transmission to transmit tractive power to a driveline. The engine is controlled during an engine operating cycle by determining a temperature of the exhaust aftertreatment system and adjusting power output of the engine based upon the temperature of the exhaust aftertreatment system and a preferred temperature range of the exhaust aftertreatment system. The electro-mechanical transmission is controlled to transmit tractive power to the driveline to meet an operator torque request based upon the adjusted power output of the engine.
Abstract:
A power frequency distribution predicting unit predicts the power frequency distribution of a vehicle in a case where the vehicle travels a route with reference to the history of the vehicle power Pv when the vehicle traveled the route in the past. An operation condition setting unit sets the range of the required vehicle power Pv0 to operate the engine as an engine operation condition for controlling the energy balance between generated power and generated electric power of an electric rotating machine in a case where the vehicle travels the route to be at a preset value according to the power frequency distribution predicted by the power frequency distribution predicting unit. An operation control unit controls the operation of the engine according to the range of the required vehicle power Pv0 to operate the engine set by the operation condition setting unit.
Abstract:
A power system of controllable transmission incorporated with an engine running at fixed speed that controls the engine to run at a fixed speed or approaching a fixed speed within an rpm range with higher BSFC (braking specific fuel consumption) when the engine is started up from static status and in the accelerated drive from low rpm, the output end of the engine drives to achieve active control of the controllable front-end gearbox that is capable of executing variable or invariable gear shift so to activate the output end to execute accelerated drive output from low to high rpm; meanwhile, in the course of start-up and acceleration from lower to high rpm and in driving operation, the engine runs in an rpm range with higher BSFC for saving fuel.
Abstract:
A control device for a vehicular drive system including (a) a differential portion having a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and a second electric motor disposed in a power transmitting path between the power transmitting member and a drive wheel of a vehicle, (b) a transmission portion which constitutes a part of the power transmitting path, (c) a coupling device operable to place a power transmitting path between the engine and the drive wheel, selectively in a power-transmitting state or a power-cutoff state, and (d) a shift lever operable between a drive position for the coupling device to select the power-transmitting state, and a non-drive position for the coupling device to select the power-cutoff state, the control device including an engine-speed control device for controlling engine speed NE so as not to exceed a predetermined engine speed value NE′ while the shift lever is placed in the non-drive position, so that the coupling device is engaged while engine torque TE is reduced as a result of an operation of the shift lever from the non-drive position to the drive position, whereby the durability of the coupling device is improved.
Abstract translation:一种用于车辆驱动系统的控制装置,包括(a)具有可操作以将发动机的输出分配到第一电动机和动力传递构件的差速机构的差速部分,以及设置在动力传递路径中的第二电动机 动力传递构件和车辆的驱动轮,(b)构成动力传递路径的一部分的传动部分,(c)可操作以在发动机和驱动轮之间放置动力传递路径的联接装置,选择性地 在动力传递状态或动力切断状态下,以及(d)可在耦合装置的驱动位置之间操作以选择动力传递状态的变速杆和用于联接装置的非驱动位置,以选择 断电状态,所述控制装置包括用于控制发动机转速N 的发动机速度控制装置,以便不超过预定的发动机转速值N E',同时 s 起升杆被放置在非驱动位置,使得由于变速杆从非驱动位置到第二驱动位置的操作,发动机扭矩T E E SUB>减小了联接装置 驱动位置,从而提高了联接装置的耐久性。
Abstract:
A method is described for determining an externally produced value, especially a momentum, accelerating or decelerating the vehicle, with the following steps: determination of the driving performance of the vehicle on the basis of a model, comparison of the model output values with the relative measuring values or values derived from this, and determination of the externally produced value according to the result of the comparison. The corresponding device includes a model of the driving performance of the vehicle, a comparator for model output values and measuring values or values derived from these and a device for determining the externally produced value according to the result of the comparison.