A vehicle for agricultural use has wheel groups, an engine group, an engine control unit, auxiliary operating groups, a gearbox group, a power take-off group, and a detection system having an engine power detector for detecting an engine power value, an auxiliary power detector for detecting an auxiliary power value, a drive power detector for detecting a drive power value, and an operating unit operatively connected to the detectors to receive the engine power value, auxiliary power value, and drive power value and suitable for identifying a take-off power value corresponding to power used by the power take-off group. The operating unit checks the drive power value with respect to a drive threshold value and/or the power take-off power value with respect to a power take-off threshold value and is connected to the engine control unit to control supply of the engine group as a function of check results.

A Dual-fuel combustion engine, possessing: a control device at least one combustion chamber at least one gas supply device for supplying a gaseous fuel to at least one combustion chamber, and at least one injector for injecting liquid fuel into the at least one combustion chamber, and which injector is controllable through a control device by the use of an actuator triggering signal, for which at least one injector possesses an output opening for the liquid fuel, which is closable by means of a needle (6), and for which the control device regulates through the use of the actuator triggering signal, the opening of the needle (6) in the ballistic region of the needle in a pilot operating mode of the combustion engine
to which end, an algorithm is stored in the control device, which receives, as input values, at least the actuator triggering signal (t) and, using an injector model, calculates the mass of liquid fuel introduced via the output opening of the injector, and which compares the mass calculated by means of the injector model with a required target value (m.sub.d.sup.ref) of the mass of liquid fuel, and on the basis of the result of such comparison, either leaves the actuator triggering signal (t) unchanged or corrects it, and a process for the operation of a combustion engine and of an injector.

The objective of the present invention is to provide a control device for an engine that enables precise control of the equivalence ratio. The system from the fuel injection amount to the output from a LAF sensor is modeled as an injection amount-sensor output model by means of a model equation containing model parameters and a lag coefficient. The system from the equivalence ratio to the LAF sensor output is modeled as a port equivalence ratio-sensor output model by means of a model equation containing the lag coefficient. The control device is equipped with: a feedback-use identifier that successively identifies values for the model parameters; a LAF lag compensation-use identifier that successively identifies values for the lag coefficient; and a stoichiometric driving mode controller that determines the value of a fuel injection amount.

An illustrative embodiment of a fuel injector control system includes a driver that is configured to supply electrical power to a fuel injector. A controller is configured to control the driver according to a predetermined sequence of states for an injection cycle. The plurality of predefined states each include parameters for supplying electrical power to a fuel injector. Each of the states has a corresponding plurality of test parameters. At least one of the test parameters is a target parameter for the state. During each of the states, the controller determines whether at least one of the test parameters is met and determines how to control the driver for a subsequent portion of the injection cycle based on which of the test parameters is met.

Method, apparatus and mobile user appliance for adapting an energy utilization process of a vehicle. At least one value of an energy utilization characteristic quantity is ascertained that represents a first energy utilization process in a first vehicle, and a value of a parameter is ascertained that represents at least one constraint of the energy utilization in the first vehicle during the energy utilization process. A mathematical relationship between at least one of the provided values of an energy utilization characteristic quantity, the values of the parameters of the first vehicle and parameters for a possible second energy utilization process of a second vehicle is ascertained. Further, a data record is provided on the basis of the ascertained mathematical relationship, and a profile data record is provided that comprises the data record. Depending on the profile data record of the first vehicle and second parameter, a fuel composition and/or a split of energy types for a drive system of a second vehicle and/or control data for an energy distribution process in a second vehicle is/are ascertained for the second energy utilization process.

Various embodiments of the present disclosure are directed towards free-piston combustion engines. As described herein, a method and system are provided for displacing a free-piston assembly to achieve a desired engine performance by repeatedly determining position-force trajectories over the course of a propagation path and effecting the displacement of the free-piston assembly based, at least in part, on the position-force trajectory. In a dual-piston assembly free-piston engine, synchronization of the two piston assemblies is provided.

Methods and systems for adjusting exhaust valve timing of an engine are described. In one example, exhaust valve timing of a compression ignition engine is adjusted responsive to a difference between a commanded exhaust valve opening timing and an actual exhaust valve opening timing, the actual exhaust valve opening timing determined from cylinder pressure.

Methods and systems are provided for learning a cylinder-to-cylinder air variation. During conditions when a PFDI engine is operated in a port-injection only mode, prior to port fuel injection, a direct-injection fuel rail pressure may be lowered via direct-injection. Then, prior to a spark event in a port-injected cylinder, the direct-injector may be transiently opened to use the rail pressure sensor for estimating a cylinder compression pressure, and inferring cylinder air charge therefrom.

A drive current applied to a coil is reduced from a time at which a first collision signal indicating collision of a movable core with a valve element is input to a time at which a second collision signal indicating collision of the movable core with a stationary core is input.

An information processing apparatus includes a memory and a processor coupled to the memory and configured to add a positive value to a first heat release rate based on an actually measured value of an in-cylinder pressure of an internal combustion engine for each crank angle of the internal combustion engine to derive a second heat release rate according to the crank angle, set a plurality of first model parameters of a Wiebe function which models a heat release rate based on the second heat release rate, store the first model parameters in the memory, and output the first model parameters from the memory in order to calculate a torque which controls the internal combustion engine at the time of actual operation of the internal combustion engine.