A hybrid electric vehicle is capable of maximizing energy efficiency during platooning, and a platooning control method is carried out on the hybrid electric vehicle. The method includes acquiring acceleration information and deceleration information of each of a plurality of vehicles traveling in a platoon form for platooning so as to realize a pulse-and-gliding traveling mode, determining a traveling order of the vehicles during the platooning based on the acceleration information, and determining a time at which to start a glide phase of a following vehicle in the determined traveling order based on a time at which a glide phase of a preceding vehicle starts using the acceleration information and the deceleration information.

A vehicle propulsion system includes a prime mover having a prime mover output shaft, a continuously variable transmission having a variator input shaft coupled to the prime mover output shaft and having a variator output shaft, a driver torque request module in communication with a driver input and for outputting a driver torque request, an engine backbone in communication with the prime mover, and a transmission backbone in communication with the continuously variable transmission and the engine backbone in the vehicle propulsion system. The transmission backbone includes a positive torque request module that generates a positive torque request, and a positive torque request monitor that limits a torque request from the transmission backbone to the engine backbone to a maximum of a predetermined threshold.

A work vehicle incudes a traveling mechanism driven by a rotational power from an engine and an implement for effecting a ground work by the rotational power of the engine. The work vehicle further includes a load ratio calculation section 53 for calculating an engine load ratio indicative of an engine load of the engine, a ground speed calculation section 51 for calculating a ground speed of the vehicle body with using satellite positioning data, a slip ratio calculation section 52 for calculating a slip ratio indicative of slippage of the traveling mechanism relative to a ground surface by using the ground speed, a traveling work control section 4 for creating an appropriate traveling work state by controlling a rotational speed of the engine and a posture of the implement, and a traveling work management section 50 for outputting a state changing command that commands a change of the traveling work state, based on the engine load ratio and the slip ratio.

A method of controlling a vehicle presenting a plurality of wheels, an engine and a clutch for selectively connecting the engine to a number of the wheels includes receiving a torque control signal indicative of a demanded output torque of the engine, and observing a value of a first vehicle operation parameter being the vehicle speed or a parameter which is indicative of the vehicle speed, controlling the clutch so as to be engaged if the received torque control signal indicates that the demanded engine torque is minimal or below a first threshold value and the observed first vehicle operation parameter value is above a second threshold value,
subsequently to the step of controlling the clutch so as to be engaged, performing a test disengagement of the clutch, including at least partly disengaging the clutch,
observing a behavior, in response to the test disengagement, of a second vehicle operation parameter, and
based at least partly on the observation of the behavior of the second vehicle operation parameter, determining whether to control the clutch so as to be re-engaged or disengaged.

A method of decoupling output torque from input torque during engine speed control of a hybrid powertrain for a vehicle comprises determining, via a controller, a virtual output torque required on an output member of a multi-mode transmission given a virtual input torque commanded on an input member of the multi-mode transmission for engine speed control in a selected mode of the multi-mode transmission such that rotational speed of the output member is unchanged to prevent undesired torque variation at the output member. The controller determines the virtual output torque via a first stored transfer function relating virtual output torque to virtual input torque based on modeled physical dynamics of the vehicle driveline for the selected mode of the multi-mode transmission. A hybrid powertrain includes an engine and a hybrid transmission, and a controller that controls the hybrid transmission according to the method.

A method includes reducing automatically a speed of an engine from a first speed value to a second speed value in response to both the first speed value being at or above a first speed threshold value and a rate of change of one or both of (i) engine power and (ii) the engine speed is substantially zero for a designated period.

Methods and systems are provided for improving engine restart operations in a hybrid vehicle. While an engine is cranked via motor torque, engine fueling is delayed until the engine speed is sufficiently high and the engine has been rotating in a forward direction continuously for a threshold duration. A disconnect clutch between the engine and motor is slipped while the engine cranks, the clutch engaged only after the engine has run up to the motor speed.

A method for controlling the speed of a work vehicle during downhill operation may include controlling an operation of at least one of an engine or a transmission of a work vehicle so as to maintain the work vehicle operating at a requested speed and identifying an operating condition of the work vehicle that provides an indication that the work vehicle is traveling downhill. In addition, the method may include determining whether at least one pre-condition for downshifting the transmission from a current gear ratio to a downshift gear ratio is satisfied when the operating condition indicates that the work vehicle is currently traveling downhill. Moreover, when it is determined that the pre-condition(s) is satisfied, the method may include controlling the operation of the transmission such that the transmission is downshifted from the current gear ratio to the downshift gear ratio.

A method for operating a motor vehicle, the motor vehicle including a prime mover (1), a transmission (2), and a driven end (3), wherein the transmission (2) is an automatic or automated transmission and is connected between the prime mover (1) and the driven end (3). The method includes activating a sailing mode of the motor vehicle depending on at least one operating condition of the motor vehicle; performing a gear select interlock in the transmission (2), while maintaining the sailing mode, when the sailing mode is active; and deactivating the sailing mode is subsequently depending on at least one operating condition of the motor vehicle. The gear select interlock is implemented in the transmission (2) depending on a rotational speed of the prime mover (1) and depending on synchronous speeds of the gears of the transmission (2).

Method for automatically assessing performance of a driver (110) of a vehicle (100) for a particular trip, wherein current driving data sets, comprising basic driving data are repeatedly read from the vehicle, which method comprises the steps a) collecting previous-trip driving data sets, comprising instantaneous vehicle energy consumption, for different previous trips, different drivers and different vehicles; b) for each of said current-trip driving data sets, selecting at least one corresponding previous-trip driving data set; c) calculating a relative instantaneous vehicle energy consumption value for said selected corresponding previous-trip driving data set or sets, which is relative to a total energy consumption for a respective trip during which the previous-trip driving data set in question was observed; d) calculating a value of the said first trip performance parameter based upon an average value of said calculated relative instantaneous energy consumptions. The invention also relates to a system.