Abstract:
The invention relates to a method for automatically switching off an internal combustion engine in a motor vehicle, in particular in a motor vehicle having an automatic transmission, by means of a stop/start device, which initiates measures for automatically switching off the internal combustion engine if the vehicle has been braked to a stop and advantageously held at a stop by actuation of the brake pedal for a predefined time interval. The invention is characterized in that the rotation speed of the internal combustion engine is changed, in particular reduced, at a defined point in time before the measures for automatically switching off the internal combustion engine are initiated.
Abstract:
A control apparatus for an engine is provided. The control apparatus includes an intake control valve controller for fully closing, when an engine stop request is issued, an intake control valve for adjusting a flow rate of intake air passing through an intake passage of the engine, an engine speed increase controller for increasing an engine speed to reach a target speed after the intake control valve is fully closed by the intake control valve controller, and a fuel injection stopper for stopping a fuel injection after the engine speed is increased by the engine speed increase controller.
Abstract:
Systems and methods for improving engine torque response are presented. In one example, engine idle speed is increased to shorten engine torque response based on engine operating conditions. The methods and systems may be useful for operating an engine that is supplied a gaseous fuel.
Abstract:
A target engine speed module selectively sets M target engine speeds for M future times, respectively, based on one of increasing and decreasing an engine speed. A prediction module, based on a set of possible target values for the M future times and a model of an engine, determines M predicted engine speeds for the M future times, respectively. A cost module determines a cost for the set of possible target values based on comparisons of the M predicted engine speeds for the M future times with the M target engine speeds for the M future times, respectively. A selection module, based on the cost, selects the set of possible target values from a group including the set of possible target values and N other sets of possible target values, and sets target values based on the selected set of possible target values. An actuator module controls an engine actuator based on a first one of the target values.
Abstract:
Methods and systems are disclosed for reducing engine flywheel power reduction of an engine while protecting a drivetrain. The method includes monitoring transmission gear selection; determining reduction in flywheel power to protect the drivetrain; and monitoring engine power consumption by other engine power loads. When other engine power loads consume less power than the reduction in flywheel power to protect the drivetrain, the method includes reducing flywheel power by the power difference. When other engine power loads consume the same or more power than the reduction in flywheel power to protect the drivetrain, the method includes not reducing the flywheel power. Engine power can be consumed by both on-vehicle and off-vehicle power loads. Engine power can be consumed by an electric generator and/or a plurality of inverters, and their power consumption can be monitored. Information and commands can be communicated over a controller area network (CAN) bus.
Abstract:
The present invention relates to a system and a method for control and reduction of the RPM of at least one main engine of a vessel, which main engine drives at least one first propeller for propulsion, which first propeller is pitch-regulated, which second thruster propeller is pitch-regulated. It is the object of the invention to reduce the RPM of one ore more main engines of a vessel and by increasing the pitch of the propellers to maintain constant propulsion, and by reducing the RPM of the main engines to re-duce the fuel consumption and in this way reduce pollution. The object can be fulfilled by a system analysing the RPM and pitch of the first main shaft propeller, which system analyses the RPM and the pitch of the second thruster propeller, which system based on said analyses performs downward regulation of the RPM of the main engine.
Abstract:
Systems and methods for improving engine torque response are presented. In one example, engine idle speed is increased to shorten engine torque response based on engine operating conditions. The methods and systems may be useful for operating an engine that is supplied a gaseous fuel.
Abstract:
An unlock operation of a lockup clutch and a shift-up operation of an automatic transmission are performed together when an accelerator pedal of a vehicle is released in a state where the lockup clutch is in a lockup state. An engine rotation speed immediately after the shift-up operation is estimated on the basis of the engine rotation speed and a gear ratio of the automatic transmission after the shift-up operation. If a fuel recovery operation is predicted to be performed immediately after the shift-up operation, the fuel-cut operation is prevented, thereby suppressing a shock from occurring due to the fuel recovery when a foot release shift-up operation is performed.
Abstract:
The invention relates to a method for regulating a gas engine (1) having a generator (5), wherein a regulator torque is calculated by means of a speed regulator from a speed regulator deviation, wherein a target volume flow is calculated at least as a function of the regulator torque, wherein a fuel volume is determined as a proportion of a fuel-air mixture as a function of the target volume flow, and wherein a target receiver pipe pressure is also calculated as a function of the target volume flow as a guide parameter for a receiver pipe pressure regulating circuit for regulating the mixture pressure (pRRA, pRRB) of a fuel-air mixture in the receiver pipe (12, 13) above the inlet valves of the gas engine (1). The invention is characterized in that a deviation of the regulator torque from a generator torque is calculated and the target receiver pipe pressure is corrected using the deviation.
Abstract:
Provided is a construction machine which is capable of suppressing useless power consumption. This construction machine is provided with an excavator body (2), a working device (30) which is attached to the excavator body (2), an engine (22) which is mounted in the excavator body (2), a generator motor (23) which is attached to the engine (22) and which can be driven as an electric generator or an electric motor, a hydraulic pump (41) which is driven by the engine (22) and the generator motor (23), a hydraulic actuator (32) which drives the working device (30) with motive power generated by the hydraulic pump (41), and a control portion (80) which lowers the drive output of the generator motor (23) in accordance with the drive state of the working device (30) and limits the drive output of the hydraulic pump (41) in order to keep the rotation frequency of the engine (22) within a range of predetermined values.