Abstract:
A hybrid vehicle includes an internal combustion engine and a rotary electric machine. The internal combustion engine includes a variable valve actuating device configured to change an operation characteristic of an intake valve. The rotary electric machine is configured to generate driving force for propelling the hybrid vehicle. A controller for the hybrid vehicle includes a traveling control unit and a valve actuation control unit. The traveling control unit executes traveling control for causing the hybrid vehicle to travel by using the driving force of the rotary electric machine while stopping the internal combustion engine. The traveling control unit starts up the internal combustion engine while executing the traveling control. The valve actuation control unit controls the variable valve actuating device. The valve actuation control unit, when the internal combustion engine is started up while the traveling control is executed, sets at least one of a valve lift and valve operating angle of the intake valve such that the at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a first vehicle speed is smaller than the corresponding at least one of the valve lift and valve operating angle of the intake valve when the hybrid vehicle travels at a second vehicle speed. The second vehicle speed is lower than the first vehicle speed.
Abstract:
A fuel economy unit (30) is disclosed for an engine system comprising an internal combustion engine or electric motor having a demand input, an output member drivable by the engine, and a user-operable demand control (13) for providing a demand signal (P1,P2) coupled to the engine demand input to control the engine output. The fuel economy unit receives an input signal (D) indicative of acceleration of the output member, or from which acceleration of the output member can be derived, and modifies the coupling of the demand signal to the engine demand input in dependence on the acceleration of the output member to limit the acceleration of the output member.
Abstract:
An electronic control unit executes throttle torque reduction control for decreasing an engine torque by reducing a throttle opening degree during an upshift of an autoraatic transmission (12) with respect to the throttle opening degree before a start of the upshift. During the upshift of the automatic transmission (12), the electronic control unit actuates a waste gate valve (68) in a closing direction with respect to a position of the waste gate valve (68) before the start of the upshift in parallel with execution of the throttle torque reduction control. Thus, a decrease in supercharging pressure due to execution of the throttle torque reduction control is suppressed during the upshift, and the engine torque that > has been temporarily decreased in an inertia phase of the upshift recovers immediately after the upshift, so it is possible to suppress deterioration of drivability.
Abstract:
Systems and methods are provided for controlling an amount of torque generated by an engine of a vehicle. The amount of torque may be controlled by limiting an amount of fuel or air or a combination thereof being provided to the engine. In some situations, controlling the amount of torque generated by the engine may be utilized to gradually limit the vehicle's acceleration, which in turn, may influence driver shifting strategies.
Abstract:
In a vehicle provided with a power propulsion system of the mild-hybrid type, a BAS unit (EM) - constituted by an electric machine connected through a belt transmission to the shaft of an internal combustion engine - is exploited as the only propulsion engine of the vehicle in given operating conditions. The internal combustion engine is provided with a system for variable actuation of the intake valves which is controlled to reduce the pumping losses of the internal combustion engine in the phase in which such engine (ICE) is in cut-off condition and it is driven by the aforementioned BAS unit (EM). It is also provided for that the system for variable actuation of the intake valves be controlled to temporarily increase the pumping losses of the internal combustion engine in a phase in which it is required to accelerate the switching off of the engine.
Abstract:
The present invention relates to a method for control of pumping work of a combustion engine (10) to lower a speed ω of the engine (10), which engine has an intake pipe (2) and an exhaust pipe (22) connected to it, the engine's pumping work being increased or decreased by regulation of a gas pressure in the intake pipe (2). The invention further relates to a device for control of pumping work of a combustion engine, a computer programme, a computer programme product and a motor vehicle provided with such a device.
Abstract:
A hybrid vehicle includes a rotary electric machine, an internal combustion engine, and a controller. The rotary electric machine is configured to generate driving force for the hybrid vehicle. The internal combustion engine includes a variable valve actuating device configured to change an operation characteristic of an intake valve. The controller is configured to control travel of the vehicle by selectively applying one of a first driving mode and a second driving mode. The controller is configured to control the variable valve actuating device such that at least one of a valve lift of the intake valve and a valve operating angle of the intake valve at start-up of the internal combustion engine when the first driving mode is selected is smaller than the corresponding at least one of the valve lift of the intake valve and the valve operating angle of the intake valve at start-up of the internal combustion engine when the second driving mode is selected. The start-up frequency of the internal combustion engine in a start-up condition in the second driving mode is higher than the start-up frequency of the internal combustion engine in the start-up condition in the first driving mode. The start-up condition is a condition for starting up the internal combustion engine in a stopped state.