Abstract: Provided is an apparatus/system for generating a nitrogen-enriched gas reliably and stably using a fuel cell. The nitrogen gas generation apparatus/system comprises: a fuel cell configured to operate by taking in air or a gas containing nitrogen and oxygen, and a fuel gas; and a catalyst combustion mechanism configured to cause an exhaust gas that is extracted from the fuel cell and has a lower oxygen concentration than air to react with the fuel gas on a combustion catalyst, and convert the exhaust gas having a lower oxygen concentration than air into a nitrogen-enriched gas having an increased nitrogen concentration.

Abstract: An apparatus/system for generating a high-purity nitrogen gas using a fuel cell includes; a fuel cell that operates by taking in air or a gas containing nitrogen and oxygen, and a fuel gas; a dehumidification mechanism that reduces moisture or water vapor content in an exhaust gas that is extracted from the fuel cell and has a lower oxygen concentration than air; and a filtering mechanism which includes a filter using fibers having different degrees of permeation for nitrogen and oxygen and converts the exhaust gas having a reduced moisture or water vapor content into a gas having an increased nitrogen concentration. The filter recovery ratio is higher when an oxygen concentration of a gas to be filtered is lower. The dehumidification mechanism is a pump unit including a water seal pump to provide an adiabatic expansion chamber in which the exhaust gas extracted from the fuel cell expands adiabatically.

Abstract: A purge flow rate to be added (a value to be added or subtracted) DQPGC is calculated based on a deviation between a target purge flow rate QPGCMD (the current value) and the purge flow rate QPGC(k?1) that was calculated in the previous control cycle (step S118), and a purge flow rate QPGC (the current value) is calculated by adding (adding or subtracting) the purge flow rate to be added DQPGC which is so calculated to the previous value QPGC(k?1) of the purge flow rate (steps S130 to S132).

Abstract: A purge flow rate to be added (a value to be added or subtracted) DQPGC is calculated based on a deviation between a target purge flow rate QPGCMD (the current value) and the purge flow rate QPGC(k−1) that was calculated in the previous control cycle (step S118), and a purge flow rate QPGC (the current value) is calculated by adding (adding or subtracting) the purge flow rate to be added DQPGC which is so calculated to the previous value QPGC(k−1) of the purge flow rate (steps S130 to S132).

Abstract: An evaporated fuel controller for an internal-combustion engine comprises a purge system for purging evaporated fuel generated inside a fuel tank to an intake system of the engine. The controller determines a guard value in accordance with driving conditions of the engine. The guard value is an upper limit of the evaporated fuel. The purge control valve is controlled to prevent the amount of the evaporated fuel from exceeding the guard value. Thus, the amount of the evaporated fuel is controlled so that influence on the air-fuel ratio control is minimized. In one embodiment, the controller further determines a transport lag of the evaporated fuel between the purge control valve and the engine. The controller determines an evaporated fuel amount purged a time period earlier, the time period corresponding to the transport lag.

Abstract: A control system for an internal combustion engine is disclosed. The engine is provided with at least one fuel injection valve for injecting fuel supplied from a fuel tank into an intake pipe of the engine. The fuel injection amount is controlled by controlling the valve opening period of the at least one fuel injection valve. A pressure difference between the pressure of fuel to be supplied to the at least one fuel injection valve and the pressure in the fuel tank is controlled such that the difference is at a constant value. The pressure in the fuel tank and the pressure in the intake pipe are detected. A correction amount is calculated according to the pressure in the fuel tank and the pressure in the intake pipe, and the valve opening period of the at least one fuel injection valve is corrected using the calculated correction amount. A required amount of fuel to be supplied to the engine is calculated according to an operating condition of the engine.

Abstract: An evaporated fuel controller for an internal-combustion engine comprises a purge system for purging evaporated fuel generated inside a fuel tank to an intake system of the engine. The controller determines a guard value in accordance with driving conditions of the engine. The guard value is an upper limit of the evaporated fuel. The purge control valve is controlled to prevent the amount of the evaporated fuel from exceeding the guard value. Thus, the amount of the evaporated fuel is controlled so that influence on the air-fuel ratio control is minimized. In one embodiment, the controller further determines a transport lag of the evaporated fuel between the purge control valve and the engine. The controller determines an evaporated fuel amount purged a time period earlier, the time period corresponding to the transport lag.

Abstract: A control system for an internal combustion engine is disclosed. The engine is provided with at least one fuel injection valve for injecting fuel supplied from a fuel tank into an intake pipe of the engine. The fuel injection amount is controlled by controlling the valve opening period of the at least one fuel injection valve. A pressure difference between the pressure of fuel to be supplied to the at least one fuel injection valve and the pressure in the fuel tank is controlled such that the difference is at a constant value. The pressure in the fuel tank and the pressure in the intake pipe are detected. A correction amount is calculated according to the pressure in the fuel tank and the pressure in the intake pipe, and the valve opening period of the at least one fuel injection valve is corrected using the calculated correction amount. A required amount of fuel to be supplied to the engine is calculated according to an operating condition of the engine.