The present invention is to provide a system for producing hydrogen gas to supply internal combustion engines, comprising a controller, an internal combustion engine, an electric system of transportation vehicle, a fuel supply unit, an exhaust sensor, a battery management system, and an electrolysis system. The system saves fuel, almost completely reduces the number of harmful emissions released into the environment, cools the internal combustion engine, and clears residue inside the internal combustion engine. In addition, the invention also provides a method for producing hydrogen gas to supply internal combustion engines.

The present invention is to provide a system for producing hydrogen gas to supply internal combustion engines, comprising a controller, an internal combustion engine, an electric system of transportation vehicle, a fuel supply unit, an exhaust sensor, a battery management system, and an electrolysis system. The system saves fuel, almost completely reduces the number of harmful emissions released into the environment, cools the internal combustion engine, and clears residue inside the internal combustion engine. In addition, the invention also provides a method for producing hydrogen gas to supply internal combustion engines.

A method for estimating pressure in an intake manifold of an indirect injection combustion engine. A pressure sensor measures pressure in the intake manifold, the intake manifold being in fluidic communication with a combustion cylinder, a piston guided in translation in the combustion cylinder and connected to a rotating crankshaft. The method includes: measuring, with the pressure sensor, a maximum pressure corresponding substantially to a maximum pressure in the intake manifold during a preceding cycle of the engine; measuring, with the pressure sensor, a minimum pressure corresponding substantially to a minimum pressure in the intake manifold during the preceding cycle of the engine; determining a pre-calculated average pressure correction factor from a crankshaft angular position and from an engine speed; and estimating the pressure in the intake manifold for the crankshaft angular position of the current engine cycle from the average correction factor and from the minimum and maximum pressures.

Systems and methods for stopping an engine of a vehicle are described. In one example, the method anticipates when an engine is expected to stop and modifies engine operation so that less fuel is in the engine's intake ports when the engine is stopped so that the fuel may not escape the engine when the engine is restarted.

Systems and methods for stopping an engine of a vehicle are described. In one example, the method anticipates when an engine is expected to stop and modifies engine operation so that less fuel is in the engine's intake ports when the engine is stopped so that the fuel may not escape the engine when the engine is restarted.

A fuel injection controller for a vessel engine to drive a propulsion apparatus mounted in a vessel is configured or programmed to execute functions of an effective opening area calculator to calculate an effective opening area of a throttle valve based on a throttle opening degree of the vessel engine, a filter value calculator to determine a first-order lag filter value of the effective opening area, a correction value calculator to determine a ratio of the effective opening area to the first-order lag filter value as a correction value, a predictive suction pressure calculator to determine predictive suction pressure by multiplying an average value of suction pressure detected at a suction passage by the correction value determined by the correction value calculator, a fuel injection amount calculator to calculate a fuel injection amount based on the predictive suction pressure, and a fuel injection driver to drive a fuel injector based on the fuel injection amount.

A fuel injection controller for a vessel engine to drive a propulsion apparatus mounted in a vessel is configured or programmed to execute functions of an effective opening area calculator to calculate an effective opening area of a throttle valve based on a throttle opening degree of the vessel engine, a filter value calculator to determine a first-order lag filter value of the effective opening area, a correction value calculator to determine a ratio of the effective opening area to the first-order lag filter value as a correction value, a predictive suction pressure calculator to determine predictive suction pressure by multiplying an average value of suction pressure detected at a suction passage by the correction value determined by the correction value calculator, a fuel injection amount calculator to calculate a fuel injection amount based on the predictive suction pressure, and a fuel injection driver to drive a fuel injector based on the fuel injection amount.

Provided is a control device and a control method of a high-efficiency internal combustion engine capable of stabilizing combustion and suppressing NO.sub.x emissions without unnecessarily increasing a mounting load on an ECU. Therefore, the control device of the internal combustion engine for controlling the internal combustion engine includes an ignition plug that ignites an air-fuel mixture of fuel and air in the combustion chamber, a combustion pressure estimation sensor that detects a combustion pressure in the combustion chamber, and a crank angle sensor that detects a crank angle of a crankshaft. An MBT region is set based on an ignition delay period from an ignition timing of the ignition plug calculated from a detection value of the combustion pressure estimation sensor and a detection value of the crank angle sensor to a combustion start timing in the combustion chamber, and a combustion period from the combustion start timing to a set amount combustion end timing when a set amount of combustion ends. An ignition timing of the ignition plug is controlled so as to fall within the set MBT region.

Provided is a control device and a control method of a high-efficiency internal combustion engine capable of stabilizing combustion and suppressing NO.sub.x emissions without unnecessarily increasing a mounting load on an ECU. Therefore, the control device of the internal combustion engine for controlling the internal combustion engine includes an ignition plug that ignites an air-fuel mixture of fuel and air in the combustion chamber, a combustion pressure estimation sensor that detects a combustion pressure in the combustion chamber, and a crank angle sensor that detects a crank angle of a crankshaft. An MBT region is set based on an ignition delay period from an ignition timing of the ignition plug calculated from a detection value of the combustion pressure estimation sensor and a detection value of the crank angle sensor to a combustion start timing in the combustion chamber, and a combustion period from the combustion start timing to a set amount combustion end timing when a set amount of combustion ends. An ignition timing of the ignition plug is controlled so as to fall within the set MBT region.

Methods and systems are provided for injecting gaseous fuel during an engine start. In one example, a method comprises generating gaseous fuel via a fuel gasification device and injecting the gaseous fuel via a fuel injector. The fuel injector is configured to inject adjacent to an ignition device.