A series hydraulic hybrid system for a vehicle and a method of operating the same is described. The series hydraulic hybrid system has a hydraulic circuit, high and low pressure hydraulic accumulators, and a control unit. The hydraulic circuit has first and second hydraulic displacement units in fluid communication. The first hydraulic displacement unit is drivingly engaged with an internal combustion engine. The high pressure hydraulic accumulator and the low pressure hydraulic accumulator are fluidly connected to the hydraulic circuit through at least one accumulator valve. The control unit is adapted to receive an input from an operator, compute a requested torque and a target system pressure based on the input, compare an accumulator pressure to the target system pressure, and control at least one of a speed of the internal combustion engine and a valve state of the accumulator valve based on the outcome of the comparison.

After a push operation of an operating unit is started (at time t1), when a speed limit acquired by a speed limit acquisition ECU is switched from a first speed limit (for example, 100 km/h) to a second speed limit (for example, 120 km/h) at time t2 in a period in which a duration time of the push operation has not yet reached a long-push completion time, a driving support ECU sets a target speed Vset to the second speed limit at a time point at which the duration time of the push operation has reached the long-push completion time thereafter (at time t3).

A variety of methods, controllers and algorithms are described for controlling a vehicle to closely follow one another safely using automatic or partially automatic control. The described control schemes are well suited for use in vehicle platooning and/or vehicle convoying applications, including truck platooning and convoying controllers. In one aspect, a power plant (such as an engine) is controlled using a control scheme arranged to attain and maintain a first target gap between the vehicles. Brakes (such as wheel brakes) are controlled in a manner configured to attain and maintain a second (shorter) target gap. Such control allows a certain degree of encroachment on the targeted gap (sometimes referred to as a gap tolerance) before the brakes are actuated. The described approaches facilitate a safe and comfortable rider experience and reduce the likelihood of the brakes being actuated unnecessarily.

Methods and systems for delivering powertrain torque of a hybrid vehicle are disclosed. In one example, torque is supplied to vehicle wheels from a piston engine, an electric machine, and a turbine engine via a planetary gear set. The planetary gear set may be configured with at least one sun gear and two ring gears.

Aspects relate to a control system and method for a vehicle suspension system in a vehicle. The control system (100, 200) is configured to: receive a disturbance angle (316) of a roll bar of the vehicle suspension system, the disturbance angle indicative of a determined relative angular displacement between ends of the roll bar caused by the vehicle interacting with a driving surface; receive a displacement value (322) of an actuator motor of the actuator of the vehicle suspension system, the displacement value of the actuator motor indicative of a sensed displacement of the actuator motor caused by the vehicle interacting with the driving surface; determine, in dependence on the disturbance angle of the roll bar and the displacement value of the actuator motor, a torque estimation (332), the torque estimation representing an expected torque provided by the actuator motor to a roll bar connected to the actuator motor; and output the torque estimation to a further vehicle system.

A power management device of a power system manages the power generation quantity of the whole power system. A power generation control device controls a power generation device using a power generation command value (Ifccon1req) of the power generation device, said power generation command value having been acquired from the power management device via a first signal system, and a parameter (Ibat) that is directly acquired from a parameter acquisition unit via a second signal system.

A power management device of a power system manages the power generation quantity of the whole power system. A power generation control device controls a power generation device using a power generation command value (Ifccon1req) of the power generation device, said power generation command value having been acquired from the power management device via a first signal system, and a parameter (Ibat) that is directly acquired from a parameter acquisition unit via a second signal system.

A supplemental hydraulic motor is provided that is coupled to an output of a continuously variable transmission in order to increase transmission output torque. The supplemental hydraulic motor is powered by a hydraulic steering pump and is also operational as a ground-driven, secondary hydraulic steering pump. In addition, the supplemental hydraulic motor may be used to retard the transmission.

A method of propelling a vehicle with a hybrid mode and a hydrostatic mode includes determining if a current propulsion mode is hybrid and if a selected mode is hydrostatic. A first transition mode is entered if the selected mode is hydrostatic and the current mode is hybrid. An engine-pump displacement target is set in the first transition mode. The method may include determining if the current mode is hybrid, hydrostatic, or a no-propulsion mode and if the selected mode is hybrid, hydrostatic, or no-propulsion. The engine-pump displacement target may be matched to a system consumption and an accumulator isolation valve closed when an engine-pump output matches the system consumption in the first transition mode. The method may include entering a second transition mode if the selected mode is hybrid and the current mode is hydrostatic. A method of configuring a propulsion mode from hybrid to hydrostatic includes configuring a drive motor displacement target to full displacement, matching a pump displacement to system consumption, and closing an accumulator isolation valve when a pump flow output matches the system consumption.

A series hydraulic hybrid system for a vehicle and a method of operating the same is described. The series hydraulic hybrid system has a hydraulic circuit, high and low pressure hydraulic accumulators, and a control unit. The hydraulic circuit has first and second hydraulic displacement units in fluid communication. The first hydraulic displacement unit is drivingly engaged with an internal combustion engine. The high pressure hydraulic accumulator and the low pressure hydraulic accumulator are fluidly connected to the hydraulic circuit through at least one accumulator valve. The control unit is adapted to receive an input from an operator, compute a requested torque and a target system pressure based on the input, compare an accumulator pressure to the target system pressure, and control at least one of a speed of the internal combustion engine and a valve state of the accumulator valve based on the outcome of the comparison.