摘要:
A controller and a control strategy for a hybrid electric vehicle having a traction motor between an engine and an automatic transmission include maintaining a bypass clutch of a torque converter in an engaged position and applying a motor torque from a traction motor to the torque converter such that slip of the torque converter does not otherwise reach zero while the bypass clutch is maintained in the engaged position.
摘要:
A method for controlling a vehicle on an uphill incline includes automatically shifting a transmission to first gear, automatically stopping the engine, using wheel torque to maintain a one-way clutch engaged and to hold a transmission component against rotation, preventing vehicle rollback by automatically engaging a target gear and tying-up the transmission automatically restarting the engine, and automatically reengaging first gear.
摘要:
A vehicle includes an engine and a traction motor. A clutch is configured to selectively mechanically couple the engine to the traction motor. A controller or controllers are provided that are configured to command a change in magnitude of an electric current supplied to the electric machine. The command is made in response to initiation of the clutch engaging the traction motor to the engine. The change in magnitude of the electric current ensures the speed of the traction motor remains generally constant during clutch engagement while a speed of the engine is less than that of the traction motor.
摘要:
A method for controlling a backing vehicle includes if a back-up sensor indicates that an obstacle is present behind the vehicle and a gear selector is moved to a reverse position, delaying reverse gear engagement and producing a warning signal, and producing a transmission tie-up if brakes are applied insufficiently to stop the vehicle.
摘要:
A vehicle includes an engine, an electric machine, a transmission, and at least one controller. The at least one controller, in response to a gear shift of the transmission that causes a speed of the engine to exceed a predetermined speed, commands a change in current to the electric machine such that the speed of the engine decreases to a target speed to avoid engine flare.
摘要:
A vehicle with a modular hybrid transmission that has a combustion engine including a turbocharger and an e-machine use barometric pressure, road grade, and estimated vehicle mass to develop a turbo lag estimate. If it is determined that undesirable turbo lag is likely, the system opens a disconnect clutch between the engine and the e-machine and the engine is started independently of the e-machine. The e-machine is then used to launch the vehicle while the engine is started.
摘要:
A method of operating a turbocharged engine having cylinders in which one of the cylinders undergoes a compression stroke. The method includes advancing an ignition spark in the one of the cylinders undergoing the compression stroke by a first amount relative to top dead center of the compression stroke at a first barometric pressure for a given engine speed and load, and advancing the ignition spark in the one of the cylinders undergoing the compression stroke by a second, lesser amount relative to top dead center of the compression stroke at a second, lower barometric pressure, for the given engine speed and load as the vehicle being at different altitudes.
摘要:
A method for sensing a volume of fluid located in an oil sump of a motor vehicle transmission includes repetitively determining a rate of change of a temperature of the oil, repetitively determining an acceleration of the vehicle, counting the number of occurrences in which said acceleration is greater than a reference acceleration and said rate of change of the temperature is greater than a reference rate of change of temperature, and producing an indication that the volume of fluid is low, if said number is greater than a reference number.
摘要:
A method for controlling a hybrid vehicle having a traction motor between an engine and a step ratio automatic transmission during a startup of the hybrid vehicle. The method includes performing at least one of adjusting a clutch or an oil pressure to change a transmission tie-up force or downshifting the transmission in response to an actuation rate of a vehicle driver demand.
摘要:
A vehicle includes an engine and a fraction motor. A clutch is configured to selectively mechanically couple the engine to the traction motor. A controller or controllers are provided that are configured to command a change in magnitude of an electric current supplied to the electric machine. The command is made in response to initiation of the clutch engaging the traction motor to the engine. The change in magnitude of the electric current ensures the speed of the traction motor remains generally constant during clutch engagement while a speed of the engine is less than that of the traction motor.