A method and system improving vehicle operation is presented. In one example, the vehicle data is transmitted between a vehicle and a cloud computer. The cloud computer adjusts engine control parameters and the vehicle is operated based on the adjusted engine control parameters.

A method for determining an amount of energy released in the working cycle of an internal combustion engine cylinder includes: (a) recording a time curve of the rotational speed of the engine crankshaft using tooth timings measured using a toothed sensor disc, (b) assigning each tooth timing to a working cycle of a selected cylinder, (c) determining a cylinder-specific average value from the tooth timings assigned to the selected cylinder, (d) determining cylinder-specific tooth timing deviations from the determined cylinder-specific average value, for the tooth timings assigned to each working cycle of the selected cylinder, (e) determining a cylinder-specific characteristic tooth timing by summing the determined tooth timing deviations, and (f) specifying the amount of energy released in the working cycle of the selected cylinder as a function of the determined cylinder-specific characteristic tooth timing, the amount of energy released being indirectly proportional to the determined cylinder-specific characteristic tooth timing.

Operating an engine system includes cold starting an engine, closing spill valves to pressurize fuel in a plurality of plunger cavities, opening injection valves in some of a plurality of fuel injectors to inject fuel into firing cylinders in an engine cycle, and opening spill valves in some of the plurality of fuel injectors while injection valves therein remain closed to bleed fuel to a lower pressure space in the engine cycle. The pressurization of fuel in the fuel injectors remaining closed parasitically loads the engine to increase a fuel burned amount hastening warm up and limiting misfire. Related apparatus and control logic is also disclosed.

A gaseous fuel supply for an engine at a wellbore can be regulated using a control system. The control system can include a processing device communicatively coupled to one or more sensors to receive a fuel property measurement from the one or more sensors. The fuel property measurement can correspond to a first fuel source of the engine that can be used as the fuel supply for the engine to power an equipment to perform a wellsite operation. Additionally, the processing device can identify a predefined range of the fuel supply that corresponds to a target performance level of the engine. Based on the fuel property measurement, the processing device can determine that the first fuel source is outside of the predefined range. In response, the processing device can provide a second fuel source as the fuel supply. The second fuel source can enable the engine to operate at the target performance level.

A fuel injection device comprising electricity-generating means generating electricity by rotation of an engine and outputting a predetermined signal, and a solenoid valve injecting fuel; the valve being opened as a result of a drive current applied to a coil, and the fuel being injected into an intake passage of the engine at a predetermined timing during the rotation of the engine; to ensure that the flow rate required during high-speed operation ca be adequately provided in a fuel injection device for injecting/supplying fuel to an engine. The electricity-generating means is an alternating current generation means attached to the engine in a crank angle position at which an output is generated in synchronization with the intake timing of the engine; the signal is an injection command signal applied to the solenoid valve as an alternating-current drive current; and the applied voltage increases with increased engine speed.

A method for the injection computation for an internal combustion engine, in particular for a gasoline range extender engine. This includes ascertaining an adaptation factor, which represents fuel aging, from a model of the fuel and a fuel outgassing via a tank vent and adaptation of a fuel injection quantity and/or a fuel injection time using the adaptation factor.

A vehicle rollover engine protection and location system 10 for an off-road vehicle includes an inertial sensor unit 22, a communication bus 18 for providing communication from both the rollover sensor 22 and a global positioning system 40 to an electronic control unit 12. When a vehicle rollover has occurred, a processor 14 of the electronic control unit 12 is configured to stop providing fuel to an engine of the off-road vehicle, stop operation of the fuel pump, determine a location of the off-road vehicle from signals of the global positioning system, perform a rollover emergency call to actively indicate rollover of the off-road vehicle, and transmit a location signal.

A self-propelled off-road agricultural vehicle such as a product applicator is provided with a system for torque control at shift points. The self-propelled applicator has a drivetrain configured with two power levels of its engine. One power level limits engine power output to a value at or below a shifting-state clutch rating of the transmission to protect the transmission while shifting. The second power level allows engine power to exceed a shifting-state clutch rating of the transmission when the transmission is not shifting.

Provided are a valve stop mechanism capable of switching intake valves and exhaust valves of deactivated cylinders between an openable/closable state and a closed state, and an engine speed control unit which controls the engine speed. The engine speed control unit controls the engine speed in such a manner that the amount of change in the engine speed with respect to time is reduced, as compared with a case in which a specific condition is not satisfied, when the specific condition that switching by the valve stop mechanism is not completed, and that connection between an engine and a power transmission unit is released is satisfied after issuance of a switching request from one of a reduced-cylinder operation and an all-cylinder operation to the other thereof.

In a work vehicle according to the present invention, a control device calculates, for each of a plurality of speed-changing stages in a PTO transmission, an expected maximum rotational speed of PTO rotary power that is output from the PTO shaft when an engine rotational speed changing operation member is operated to a maximum extent, and shows, in a listed manner, the calculated results in a liquid crystal display part of a display device. The present invention can inform an operator of the maximum rotational speed of PTO rotary power that is output from the PTO shaft for each speed-changing stage in the PTO transmission without performing a speed changing operation on the PTO transmission.