Abstract: Provided is an engine that suppresses the occurrence of knocking or an accidental fire, which makes it possible to perform the operations of premixed compression self-ignition. Regarding the present invention, an engine includes a reforming cylinder, which is a fuel reforming device, and the reforming cylinder is connected to an intake pipe and an EGR pipe via a supply pipe and connected to the intake pipe via an exhaust pipe, and a primary fuel injection device is provided that injects fuel to the mixture of intake air and exhaust gas supplied to the reforming cylinder through the supply pipe.

Abstract: The purpose of the present invention is to provide: an exhaust purification system capable of suppressing a discharged NOx amount to no more than a NOx limit and of selecting a combination of means for decreasing NOx in accordance with the operation state of an engine and the state of the exhaust purification system; and a ship comprising same.

Abstract: Provided is an engine that suppresses the occurrence of knocking or an accidental fire, which makes it possible to perform the operations of premixed compression self-ignition. Regarding the present invention, an engine includes a reforming cylinder, which is a fuel reforming device, and the reforming cylinder is connected to an intake pipe and an EGR pipe via a supply pipe and connected to the intake pipe via an exhaust pipe, and a primary fuel injection device is provided that injects fuel to the mixture of intake air and exhaust gas supplied to the reforming cylinder through the supply pipe.

Abstract: The purpose is to provide a ship such that the pressure in a common rail of a fuel injection device for a stopped engine is prevented in advance from increasing due to a rotating force generated by a stream of water. Provided is a ship with multiple engines controlled by means of a ship navigation control device, said ship being configured such that a single or multiple propellers for propulsion are connected to the multiple engines, and such that the ship navigation control device determines, when the sea speed of the ship is equal to or greater than a predetermined speed when engine(s) among the multiple engines are stopped, that there is a possibility of the output shafts of the stopped engines being rotated by a motive force applied to the propellers for propulsion by a stream of water.

Abstract: A diesel engine in which a lubrication oil on the wall surface of the cylinder liner is prevented from being burned and diluted, and a smoke resulting from the local lack of air in the combustion chamber is also prevented from being generated. The diesel engine comprises a group injection hole nozzle 20 and a piston 110. A step 115 having a height gradually increased toward the radial outer circumference of the piston is formed over the entire circumference of the top surface 111 of the piston. Furthermore, a tilted part 115b is formed as the step surface of the step 115.

Abstract: A fuel injection control device for a diesel engine controls the first fuel injection timing so as to reduce the amount of white smoke generated in large amounts immediately after starting an engine. The fuel injection control device for the diesel engine comprises a high-pressure pump, a common rail for accumulating a highly-pressured fuel, injectors for injecting the fuel into a combustion chamber and a control means. Due to the fuel injection control device for the diesel engine, the fuel injection is performed after the cranking, without injecting the fuel for a certain period of time after an engine starting switch is turned on so that the pressure in the common rail becomes a set value.

Abstract: A method for controlling an internal combustion engine, in which a traveling with reduced cylinders is controlled according to the idle-speed after the engine starting, so as to restrain the discharge of white smokes at the time lag for temperature equilibration soon after a cold starting. The method comprises a coolant water temperature detecting means 10 for detecting the coolant water temperature in the internal combustion engine 1, a rotation speed detecting means 12 for detecting the rotation speed of the internal combustion engine 1 and a control means for controlling the operation of the internal combustion engine 1 in accordance with the coolant water temperature and the rotation speed. When the internal combustion engine is evaluated that it is at the cold starting and the rotation speed reaches the predetermined rotation speed after the engine starting, a traveling with reduces cylinders is performed, which reduces the number of cylinders injecting fuels for a certain period of time.

Abstract: A cetane number detection device in which an angular velocity detection device (10) for detecting the rotation angular velocity of the crankshaft (11) of an engine (54), and which detects a variation in the value of the amplitude of the angular velocity detected by the angular velocity detection device (10) as a variation in cetane number.

Abstract: In a diesel engine equipped with an injector 1 having a plurality of intersections between an axis line of the injector 1 and the axes of injection holes 10a bored in the injector 1, an air intake valve 25 is controlled so that it is closed at timing before a BDC (at timing when a piston comes to a bottom dead center) by an ECU 50, which controls the timing of closing the air intake valve 25 based on operating conditions of the engine.

Abstract: Provided is an engine capable of activating a catalyst in an exhaust purifying apparatus during low-temperature ignition. The engine (101) comprises a main engine body provided with a plurality of cylinders (6a-6f), an exhaust purifying apparatus comprising an oxidation catalyst (31) provided to a fuel injection apparatus (14) for injecting fuel into the cylinders (6a-6f) and to the main engine body exhaust path, and a controller (50) for adjusting the fuel injection amount and fuel injection timing by the fuel injection apparatus (14), wherein during the low temperature ignition of the engine (101) that performs a cylinder cut-off operation for cutting off the injection of fuel into specified cylinders (6a-6c), the controller (50) injects fuel at least one time at or after the top dead center within a single combustion cycle of the operating cylinders (6d-6f) other than the specified cylinders.

Abstract: Provided is an engine which can certainly be started even in a very-low-temperature range. The engine comprises a plurality of cylinders, a fuel injection device which injects fuel to the respective cylinders, a combustion chamber temperature calculation means which calculates a temperature in a combustion chamber, a control means which starts the engine by normal operation which injects the fuel to all the cylinders by the fuel injection device or reduced-cylinder operation which injects the fuel to only specified cylinders by the fuel injection device. When starting the engine, the control means controls the engine to conduct the normal operation when the temperature in the combustion chamber calculated by the combustion chamber temperature calculation means is in the very-low-temperature range and to conduct the reduced-cylinder operation when the temperature in the combustion chamber comes into a low-temperature range.

Abstract: A diesel engine in which a lubrication oil on the wall surface of the cylinder liner is prevented from being burned and diluted, and a smoke resulting from the local lack of air in the combustion chamber is also prevented from being generated. The diesel engine comprises a group injection hole nozzle 20 and a piston 110. A step 115 having a height gradually increased toward the radial outer circumference of the piston is formed over the entire circumference of the top surface 111 of the piston. Furthermore, a tilted part 115b is formed as the step surface of the step 115.

Abstract: A method for controlling an internal combustion engine, in which a traveling with reduced cylinders is controlled according to the idle-speed after the engine starting, so as to restrain the discharge of white smokes at the time lag for temperature equilibration soon after a cold starting. The method comprises a coolant water temperature detecting means 10 for detecting the coolant water temperature in the internal combustion engine 1, a rotation speed detecting means 12 for detecting the rotation speed of the internal combustion engine 1 and a control means for controlling the operation of the internal combustion engine 1 in accordance with the coolant water temperature and the rotation speed. When the internal combustion engine is evaluated that it is at the cold starting and the rotation speed reaches the predetermined rotation speed after the engine starting, a traveling with reduces cylinders is performed, which reduces the number of cylinders injecting fuels for a certain period of time.

Abstract: In a method for boring injection holes of an injector 1 having a plurality of intersections between an axis line of the injector 1 and the axes of the injection holes 10a bored in the injector 1, or so-called a group of injection holes 10, flat sections 10c, 10d, which are perpendicular to the injection holes 10a and include apertures of the injection holes 10a, are formed on boring portions of injection holes 10a. The boring portions are provided with recessed portions 10b and the recessed portions 10b are formed at the bottom thereof with flat sections 10c. Alternatively, the flat sections 10c, 10d are formed by cutting the boring portions, or by forging them.

Abstract: In a diesel engine equipped with an injector 1 having a plurality of intersections between an axis line of the injector 1 and the axes of injection holes 10a bored in the injector 1, an air intake valve 25 is controlled so that it is closed at timing before a BDC (at timing when a piston comes to a bottom dead center) by an ECU 50, which controls the timing of closing the air intake valve 25 based on operating conditions of the engine.

Abstract: A method of controlling a premix compression self-igniting internal combustion engine in which intake air and fuel are mixed in advance in a combustion chamber and the mixture is self-ignited by compression. Optimal self-ignition timing in accordance with operation condition can be obtained with the method for improved combustion. An exhaust valve (9) is temporarily reopened during a compression stroke, and timing of closing the reopened valve is variable, so that timing of the closure is varied for an effective compression ratio at which optimal self-igniting timing can be obtained at each operation region. A valve closure timing map for the exhaust valve reopening is formed from an engine speed and load, and closure timing of the exhaust valve (9) is varied based on the map. The closure timing of the exhaust valve (9) is varied such that an effective compression ratio is increased in an operation region where the load is small, and the ratio is reduced with an increase in the load.

Abstract: The invention provides a control method of intending to improve a heat efficiency by an Atkinson cycle, improve a charging efficiency, improve an efficiency of a supercharger and increase a freedom of cam design. In particular, the invention relates to a control method of opening and closing a valve in an internal combustion engine with supercharger. An effective compression ratio is decreased by temporarily re-opening an exhaust valve in a compression stroke first stage, whereby a heat efficiency is improved without excessively increasing a cylinder internal pressure. Preferably, an exhaust valve re-opening time is set such that the effective compression ratio/expansion ratio is within a range from 0.5 to 0.9. Further, an exhaust valve is not temporarily opened in a compression stroke first stage, at a time of starting or driving under a low load, and the Atkinson cycle in accordance with the re-opening of the exhaust valve is achieved at a time of driving under a high load.