A method includes estimating a first pressure at a first location of a clutch based on a flow rate of a fluid in the clutch, computing a first torque lead value based on the first pressure, computing a second torque lead value based on a second pressure, computing a third torque lead value by combining the first torque lead value and the second torque lead value, and applying torque from a motor of the vehicle based on the third torque lead value.

A method for controlling a line pressure of a hybrid vehicle includes applying, by a controller, a set current corresponding to a target pressure to a first solenoid valve controlling the line pressure, driving, by the controller, a second solenoid valve to open an engine clutch after the applying step, comparing, by the controller, a difference value between a real pressure of the engine clutch sensed by a pressure sensor and the target pressure with a preset pressure after the driving step, and as a result of performing the comparing step, if the difference value is equal to or greater than the preset pressure, controlling, by the controller, an increase of a revolution per minute (RPM) speed of the electric oil pump and an increase of a pressure of the first solenoid valve to be alternately generated.

A slip control method and arrangement for a drivetrain including a continuously variable transmission, forward-reverse clutch arrangement and an optional three-speed gearbox is described herein. The forward-reverse clutch arrangement includes a clutch that is so controlled as to slip when a torque higher than the usable torque attempts to pass through. Accordingly, the clutch prevents the prime mover from stalling.

A controller for a hybrid vehicle restarts an engine in a start mode selected from multiple start modes. The multiple start modes include a first start mode of starting combustion in the engine when a clutch starts transmitting torque and a second start mode of starting combustion in the engine after the clutch starts transmitting torque. The controller is configured to, in a case in which the engine is restarted in the second start mode, measure a cranking start time from when engagement of the clutch is commanded to when transmission of the torque through the clutch is started, and only when measurement of the cranking start time has been completed after the vehicle is activated, restart the engine in the first start mode.

A vehicle control apparatus includes: a clutch controller configured to switch an operation state of a clutch mechanism from a release state to an engagement state upon switching of a traveling mode from a motor traveling mode to an engine traveling mode; and a motor controller configured to control a traveling motor to suppress variation in torque upon starting of the engine. The clutch controller is configured to control the clutch mechanism to be brought into the engagement state at a first engaging speed when the engine is started on a condition that a revolution speed of the motor driving system is higher than a revolution threshold, and to control the clutch mechanism to be brought into the engagement state at a second engaging speed lower than the first engaging speed when the engine is started on a condition that the revolution speed is lower than the revolution threshold.

The present document relates to a dual motor electric driveline, comprising: a transmission having an input and an output, a power take-off (PTO), a first electric motor drivingly engaged or selectively drivingly engaged with the input of the transmission, a second electric motor, a first clutching device, and a second clutching device, wherein the second electric motor is selectively drivingly engaged with the input of the transmission through the first clutching device, and wherein the second electric motor is selectively drivingly engaged with the PTO through the second clutching device. The present document further relates to a vehicle including said dual motor electric driveline, and to a method of controlling said dual motor electric driveline.

A vehicle drive device includes: an electric motor; a multi-plate clutch including a plurality of clutch plates; a pressing mechanism configured to press the multi-plate clutch; an output rotary member to which a drive force of the electric motor is transferred through the multi-plate clutch; and a control device configured to control the electric motor and the pressing mechanism. The control device is configured to control the pressing mechanism using information on the result of test operation performed while the vehicle is stationary.

A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.

A method of estimating a load on a vehicle (10), the method comprising: obtaining a first load estimate using a first load estimation technique; obtaining a second load estimate using a second load estimation technique; analysing characteristics of the first load estimate and the second load estimate; and, based on the analysis selecting either the first load estimate or the second load estimate as an output load estimate.

Systems and methods for operating a driveline disconnect clutch of a hybrid vehicle are presented. In one example, torque capacity of a driveline disconnect is adjusted in response to a change in commanded line pressure. The torque capacity of the driveline disconnect clutch may be adjusted in according to a maximum transmission line pressure.