Abstract: The present disclosure relates to a computer system for controlling a powertrain system of a vehicle, the powertrain system including an internal combustion engine connectable to one or more drive wheels, the computer system comprising processing circuitry configured to selectively operate the powertrain system in a number of operational modes comprising at least a freewheeling mode (ES-FM), in which an output shaft of the engine is non-rotating and the engine is disconnected from the one or more drive wheels, wherein the processing circuitry is further configured to identify, in the freewheeling mode, a braking situation for the vehicle; responsive to the identified braking situation, determine to switch from a first clutch actuating engine restarting mode to a second clutch actuating engine restarting mode; and restart the engine by controlling a clutch according to the second clutch actuating engine restarting mode.

Abstract: The present disclosure relates to a computer system for controlling a powertrain system of a vehicle, the powertrain system including an internal combustion engine connectable to one or more drive wheels, the computer system including processing circuitry configured to selectively operate the powertrain system in at least a freewheeling mode (ES-FM), the processing circuitry further being in communication with a braking system for the vehicle, wherein the processing circuitry is configured to: determine, in the freewheeling mode, a need for restarting the engine; identify, in the freewheeling mode, a braking situation for the vehicle requiring an activation of braking of the one or more drive wheels; cancel the activation of braking of the one or more drive wheels or determine to decrease the braking operation in response to the determined need for restarting the engine; and restart the engine in response to the cancelation or the decreased braking operation.

Abstract: A computer system for controls a powertrain system of a vehicle. The computer system has processing circuitry to operate the powertrain system in a freewheeling mode, in which an output shaft of an engine is non-rotating, and the engine is disconnected from one or more drive wheels. The processing circuitry determines an opportunity for the freewheeling mode by predicting a feasibility of restarting the engine along an intended route by using a controllable clutch. Predicting the feasibility of restarting the engine by using the controllable clutch includes determining fulfillment of any one of a first restarting condition and a second restarting condition. The powertrain system is controlled into the freewheeling mode upon the fulfillment of any one of the first restarting condition and the second restarting condition.

Abstract: A computer system controls an engine restart attempt of a vehicle, while the vehicle is moving. The computer system has processing circuitry to obtain data comprising real-time rotational speed level of any one of a powertrain shaft being mechanically connected to one or more wheels and the one or more wheels; control a controllable clutch to a torque transfer position, allowing the controllable clutch to change a torque transfer between an engine and the one or more wheels; determine, from the received data, a speed decrease of the rotational speed level; determine a time period of the speed decrease extension; determine that the determined speed decrease exceeds a predetermined threshold level; determine that the determined time period of the speed decrease extension is within a predetermined threshold time period; and determine to abort the restart engine attempt.

Abstract: A computer system controls a powertrain system of a vehicle. The computer system has processing circuitry configured to selectively operate the powertrain system in a number of operational modes, comprising at least a freewheeling mode, in which an output shaft of the engine is non-rotating, and the engine is disconnected from the one or more drive wheels, wherein the processing circuitry is further configured to: predict fuel saving in response to a potential up-coming freewheeling mode period, the fuel saving being determined from engine-idle fuel consumption data; predict a loss of kinetic energy for restarting the engine in the freewheeling mode using a controllable clutch; predict fuel consumption needed to regain the predicted loss of kinetic energy; compare the predicted fuel saving with the predicted fuel consumption; determine to control the powertrain system into the freewheeling mode based on the comparison; and control the powertrain system into the freewheeling mode.

Abstract: A computer system has processing circuitry to selectively operate the powertrain system in at least a freewheeling mode, in which an output shaft of the engine is non-rotating, and the engine is disconnected from the one or more drive wheels. The processing circuitry is further configured to: determine an opportunity for the freewheeling mode by predicting a feasibility of restarting the engine along an intended route by using a controllable clutch. Predicting the feasibility of restarting the engine by using the controllable clutch includes determining fulfillment of any one of a first restarting condition and a second restarting condition. Determining fulfillment of the first restarting condition includes comparing current total weight of the vehicle with a threshold value indicative of a minimum total weight for avoiding excessive braking of the vehicle during restarting at a high friction road condition with a given total gear ratio.

Abstract: A computer system controls an engine restart attempt of a vehicle, while the vehicle is moving. The computer system has processing circuitry to obtain data comprising real-time rotational speed level of any one of a powertrain shaft being mechanically connected to one or more wheels and the one or more wheels; control a controllable clutch to a torque transfer position, allowing the controllable clutch to change a torque transfer between an engine and the one or more wheels; determine, from the received data, a speed decrease of the rotational speed level; determine a time period of the speed decrease extension; determine that the determined speed decrease exceeds a predetermined threshold level; determine that the determined time period of the speed decrease extension is within a predetermined threshold time period; and determine to abort the restart engine attempt.

Abstract: A computer system comprising processing circuitry configured to: receive an engine restart request for restarting an engine of a vehicle while the vehicle is moving; receive, directly from the engine, a signal encoding a real-time rotational speed of the engine; and control an actuator to gradually engage a clutch of a transmission coupled to rotating wheels of the vehicle in such a way that a rate of change of the real-time rotational speed of the engine is kept below a predefined threshold rate of change.