Patent application number | Description | Published |
20120265382 | Torque Modulation in a Hybrid Vehicle Downshift During Regenerative Braking - A controller and a control strategy minimizes shift shock in a hybrid electric vehicle during a downshift conducted while the vehicle is in a regenerative braking mode by maintaining total powertrain torque at a desired target during the downshift. The controller has three preferable modes including modulating just engine torque, modulating just electric motor torque or simultaneously modulating both motor and engine torque. | 10-18-2012 |
20130158756 | Hybrid Vehicle Drive Control System and Method for Providing Motor Torque Boost Compensating for Engine Delay and Torque Exceeding Maximum Engine Torque - A vehicle control system including a combustion engine and an electric motor selectively provided torque to a transmission separately or in combination to meet driver torque demand. The engine has a maximum torque output value and a torque increase delay response function spanning a predetermined time period. A motor torque boost signal requests an increase in torque provided from an electric motor if the engine torque request signal exceeds the maximum torque output of the engine or the torque increase delay response function of the engine. The motor torque boost signal is time limited and a second level of motor torque boost may be provided for a second limited time period. | 06-20-2013 |
20130296112 | CONTROLLING POWERTRAIN COMPONENTS FOR HILL-HOLDING IN A HYBRID ELECTRIC VEHICLE - A hybrid electric vehicle includes an engine and a traction motor coupled to the engine by a coupling device or a clutch for providing torque to wheels of the vehicle. An inverter is electrically connected to the traction motor. A second coupling device or at least one clutch at least indirectly selectively couples the motor to the drive wheels. A controller controls the second coupling device based upon a temperature of at least one of the fraction motor and the inverter. | 11-07-2013 |
20130297105 | ENGINE START FOR A HYBRID ELECTRIC VEHICLE - A hybrid vehicle has an engine, an electric machine connected to the engine by an upstream clutch, a transmission gearbox connected to the electric machine by a downstream clutch, and a controller. The controller is configured to start the engine using one of a plurality of start sequences that control the electric machine, the upstream and downstream clutches. The engine start sequence is selected based on transmission gearbox input speed and a driver demand input. A method of controlling a hybrid vehicle is provided. An engine is selectively coupled to an electric machine by an upstream clutch with the electric machine selectively coupled to a transmission gearbox by a downstream clutch. The engine is started using a control sequence to control the electric machine, upstream clutch, and downstream clutch. The control sequence is determined by a vehicle state based on transmission gearbox input speed and a driver demand input. | 11-07-2013 |
20130297125 | TORQUE FILLING AND TORQUE COORDINATION DURING TRANSIENTS IN A HYBRID VEHICLE - A system and method for controlling a vehicle powertrain is provided. The system and method sets a required transmission input torque during a transient event. A required traction motor torque and a required engine torque, in combination, are set to fulfill the required transmission input torque. The system and method includes estimates an actual engine torque during a delay in providing the required engine torque during the transient event. A transient traction motor torque is commanded based on a difference between the actual engine torque and the required transmission input torque. The commanded transient motor torque compensates for the delay in providing the required engine torque in order to prevent torque disturbances during the transient event. | 11-07-2013 |
20130297126 | OPPORTUNISTIC CHARGING OF HYBRID VEHICLE BATTERY - A control system for a modular hybrid electric vehicle operates an internal combustion engine at a torque level above the driver demanded torque improving the engine's efficiency. A traction motor driveably connected to the engine is operated at a torque level such that the combined torque satisfies the driver demand. The traction motor torque is limited to avoid inefficient combinations of speed and torque at which the motor is inefficient. During idle operation, the traction motor is operated at a torque determined from a battery state of charge and the engine is operated to maintain a predetermined speed. If the engine speed drops below a threshold, motor torque is adjusted to reduce the load on the engine to avoid stalling. | 11-07-2013 |
20140148305 | Method and Apparatus for Limiting Engine Torque to Protect Disconnect Clutch in a Hybrid Vehicle - A powertrain comprising an engine, a motor, a disconnect clutch connected between the engine and the motor, and a transmission. The transmission is connected to the motor by a launch clutch and selectively and indirectly connected to the engine by the disconnect clutch. A controller receives an engine torque output signal and reduces the torque output of the engine to the clutch capacity limit value. A system and a method are also provided for controlling a powertrain for a hybrid vehicle. | 05-29-2014 |
20150025724 | METHODS AND SYSTEMS FOR RESTARTING AN ENGINE - Systems and methods for improving operation of a hybrid vehicle are presented. In one example, torque output of a motor is controlled to include a reserve torque for starting an engine that may be selectively coupled to the motor. Additionally, the motor torque compensates for disconnect clutch closing. | 01-22-2015 |
20150066264 | METHODS AND SYSTEMS FOR HYBRID DRIVELINE CONTROL - Systems and methods for operating and hybrid driveline are presented. In one example, driver demand torque may be supplied to vehicle wheels via a hydraulic torque path and a friction torque path. Torque is distributed between the friction torque path and the hydraulic torque path in a way that ensures that driver demand torque is met and the friction torque path transfers torque up to its capacity. | 03-05-2015 |