Abstract: A control device of an engine including a cylinder, a piston, a cylinder head, and a combustion chamber, is provided. The device includes intake and exhaust ports, a swirl control valve, a fuel injection valve attached to the cylinder head to be oriented into the combustion chamber and having first and second nozzle ports, and a control unit. The control unit includes a processor configured to execute a swirl opening controlling module to control the swirl control valve to have a given opening at which a swirl ratio inside the combustion chamber becomes 2 or above, and a fuel injection timing controlling module to control the fuel injection valve to inject fuel at a given timing at which the swirl ratio becomes 2 or above and a swirl flow from a lower portion to a higher portion of the combustion chamber in a side view occurs.

Abstract: A control system of a compression-ignition engine is provided, which includes an engine configured to cause combustion of a mixture gas inside the combustion chamber, an injector attached to the engine and configured to inject fuel into the combustion chamber, a spark plug disposed to be oriented into the combustion chamber and configured to ignite the mixture gas inside the combustion chamber, and a controller connected to the injector and the spark plug and configured to operate the engine by outputting a control signal to the injector and the spark plug, respectively. After the spark plug ignites the mixture gas to start combustion, unburned mixture gas combusts by self-ignition. The controller outputs the control signal to the injector so that a fuel injection timing is advanced when the engine operates at a high speed than at a low speed.

Abstract: A control system of a compression-ignition engine is provided, which includes an engine, an injector, a spark plug, and a controller connected to the injector and the spark plug, and configured to operate the engine by outputting a control signal to the injector and the spark plug. After the spark plug ignites mixture gas to start combustion, unburned mixture gas combusts by self-ignition. The controller outputs the control signal to the injector to perform a first-stage injection of fuel and then a second-stage injection in which fuel is injected to at least form the mixture gas around the spark plug. The controller also outputs the control signal to the injector to control a ratio of the injection amount of the second-stage injection with respect to the injection amount of the first-stage injection to be higher at a high engine speed than at a low engine speed.

Abstract: A control system of a compression-ignition engine is provided, which includes an engine configured to cause combustion of mixture gas inside a combustion chamber, a spark plug, and a controller configured to operate the engine. The combustion is performed in a given mode in which, after the spark plug ignites the mixture gas to start combustion, unburned mixture gas combusts by self-ignition. The controller has a heat amount ratio changing module configured to change, according to an engine operating state, a heat amount ratio as an index relating to a ratio of a heat amount generated when the mixture gas combusts by flame propagation with respect to a total heat amount generated when the mixture gas inside the combustion chamber combusts. The controller causes the changing module to increase the heat amount ratio at a high engine speed than at a low engine speed.

Abstract: A control device for a compression self-ignition combustion engine is provided, which includes a variable valve operating system configured to introduce internal exhaust gas recirculation (EGR) gas into a combustion chamber, a boosting system configured to boost intake air, a controller configured to control the valve operating system, and a sensor connected to the controller and configured to detect a parameter related to an operating state of the engine. An operation mode of the valve operating system is switchable between first and second modes. The boosting system boosts the intake air when an engine load is higher than a given load, and does not boost when lower than the given load. When the engine load is high, the controller controls the valve operating system to operate in the first mode, and when the load is low, the controller controls the valve operating system to operate in the second mode.

Abstract: A control device for a compression ignition engine includes a controller configured to operate an engine body by compression ignition combustion when the engine body operates in a compression ignition range. When the engine body operates in a low load range with a load lower than a predetermined load in the compression ignition range, the controller sets a time of fuel injection with the fuel injection valve in a first half of a compression stroke or earlier, and allows the ozonator to introduce the ozone into the cylinder. When the engine body operates in the low load range, the controller controls an ozone concentration to be lower at a higher speed than at a low speed.

Abstract: A discharge position adjusting method includes: moving a first nozzle row and a second nozzle row in scanning directions, each of the first and second nozzle rows having a plurality of nozzles that eject liquid droplets, the first and second nozzle rows being disposed at different locations in a predetermined direction, the scanning directions intersecting the predetermined direction; forming a first image by ejecting liquid droplets from the first nozzle row, and forming a second image by ejecting liquid droplets from the second nozzle row; and adjusting positions at which liquid droplets are to be placed by using the first and second images. The first and second images are created during the moving of the first and second nozzle rows.

Abstract: A liquid droplet ejecting method which includes forming an image which is configured by a raster which is completed using liquid droplet ejecting operations of n times by alternately repeating a transport operation, and a liquid droplet ejecting operation in which liquid droplets are ejected on the medium while moving a first head which includes a plurality of nozzles, and a second head which aligns on the upstream side of the first head, in a scanning direction which intersects the transport direction in a scanning manner, in which, in a liquid droplet ejecting operation after a liquid droplet ejecting operation in which a first nozzle column and a second nozzle column are used in one liquid droplet ejecting operation, the number of times m (blank time) in which a liquid droplet ejecting operation of not using the second nozzle column is continuously executed is less than 0.5n.

Abstract: An ink set includes a first black ink which includes water, less than 0.3 mass % of carbon black, and a resin, in which a solid content in the ink is 20 times or more a content of the carbon black; a second black ink which includes water, 0.3 mass % or more and less than 0.6 mass % of carbon black, and a resin, in which a solid content in the ink is 10 times or more a content of the carbon black; a third black ink which includes water, 0.6 mass % or more and less than 1.5 mass % of carbon black, and a resin, in which a solid content in the ink is twice or more a content of the carbon black; and a fourth black ink which includes water, 1.5 mass % to 10 mass % of carbon black, and a resin.

Abstract: A control device of an engine is provided. The engine is operated at a high compression ratio, a geometric compression ratio of the engine being 14:1 or higher. The control device includes a fuel injection controller for controlling a fuel injector of the engine to start a fuel injection in a latter half of a compression stroke within an engine operating range where an engine speed is below a predetermined value and an engine load is above a predetermined value, and an ignition controller for controlling an ignition plug of the engine to retard an ignition timing when a timing for the fuel injection controller to start the fuel injection is on a retarding side of a predetermined timing, the ignition timing being retarded based on a retarding amount of the fuel injection start timing from the predetermined timing.

Abstract: A control device for a compression ignition engine includes a controller configured to operate an engine body by compression ignition combustion when the engine body operates in a predetermined compression ignition range. When the engine body operates in a predetermined high load range of the compression ignition range, the controller maximizes a filling amount of the cylinder using a gas state adjustment system, and lowers an EGR ratio so that the air-fuel mixture in the cylinder is lean with an excess air ratio ? higher than 1 in a lower speed range, and maximizes the filling amount of the cylinder, and increases the EGR ratio so that the air-fuel mixture in the cylinder has the excess air ratio ? of 1 or lower in a higher speed range than the lower speed range.

Abstract: A liquid ejecting apparatus includes a plurality of nozzles; a moving portion which moves the plurality of nozzles to the medium; and a control portion which controls the plurality of nozzles and the moving portion. The plurality of nozzles include a first-type nozzle group which records dots using a nozzle use rate which is less than a first threshold value; a second-type nozzle group which records dots using a nozzle use rate which is the first threshold value or more, and less than a second threshold value; and a third-type nozzle group which records dots using a nozzle use rate of the second threshold value or more.

Abstract: An ink set includes a first black ink which includes water, less than 0.3 mass % of carbon black, and a resin, in which a solid content in the ink is 20 times or more a content of the carbon black; a second black ink which includes water, 0.3 mass % or more and less than 0.6 mass % of carbon black, and a resin, in which a solid content in the ink is 10 times or more a content of the carbon black; a third black ink which includes water, 0.6 mass % or more and less than 1.5 mass % of carbon black, and a resin, in which a solid content in the ink is twice or more a content of the carbon black; and a fourth black ink which includes water, 1.5 mass % to 10 mass % of carbon black, and a resin.

Abstract: A liquid ejecting apparatus includes a plurality of nozzles; a moving portion which moves the plurality of nozzles to the medium; and a control portion which controls the plurality of nozzles and the moving portion. The plurality of nozzles include a first-type nozzle group which records dots using a nozzle use rate which is less than a first threshold value; a second-type nozzle group which records dots using a nozzle use rate which is the first threshold value or more, and less than a second threshold value; and a third-type nozzle group which records dots using a nozzle use rate of the second threshold value or more.

Abstract: A liquid ejecting apparatus includes a plurality of nozzles; a moving portion which moves the plurality of nozzles to the medium; and a control portion which controls the plurality of nozzles and the moving portion. The plurality of nozzles include a first-type nozzle group which records dots using a nozzle use rate which is less than a first threshold value; a second-type nozzle group which records dots using a nozzle use rate which is the first threshold value or more, and less than a second threshold value; and a third-type nozzle group which records dots using a nozzle use rate of the second threshold value or more.

Abstract: A liquid ejecting apparatus includes a plurality of nozzles; a moving portion which moves the plurality of nozzles to the medium; and a control portion which controls the plurality of nozzles and the moving portion. The plurality of nozzles include a first-type nozzle group which records dots using a nozzle use rate which is less than a first threshold value; a second-type nozzle group which records dots using a nozzle use rate which is the first threshold value or more, and less than a second threshold value; and a third-type nozzle group which records dots using a nozzle use rate of the second threshold value or more.

Abstract: A discharge position adjusting method includes: moving a first nozzle row and a second nozzle row in scanning directions, each of the first and second nozzle rows having a plurality of nozzles that eject liquid droplets, the first and second nozzle rows being disposed at different locations in a predetermined direction, the scanning directions intersecting the predetermined direction; forming a first image by ejecting liquid droplets from the first nozzle row, and forming a second image by ejecting liquid droplets from the second nozzle row; and adjusting positions at which liquid droplets are to be placed by using the first and second images. The first and second images are created during the moving of the first and second nozzle rows.

Abstract: A liquid droplet ejecting method which includes forming an image which is configured by a raster which is completed using liquid droplet ejecting operations of n times by alternately repeating a transport operation, and a liquid droplet ejecting operation in which liquid droplets are ejected on the medium while moving a first head which includes a plurality of nozzles, and a second head which aligns on the upstream side of the first head, in a scanning direction which intersects the transport direction in a scanning manner, in which, in a liquid droplet ejecting operation after a liquid droplet ejecting operation in which a first nozzle column and a second nozzle column are used in one liquid droplet ejecting operation, the number of times m (blank time) in which a liquid droplet ejecting operation of not using the second nozzle column is continuously executed is less than 0.5n.

Abstract: A control device for a compression ignition engine includes a controller configured to operate an engine body by compression ignition combustion when the engine body operates in a compression ignition range. When the engine body operates in a low load range with a load lower than a predetermined load in the compression ignition range, the controller sets a time of fuel injection with the fuel injection valve in a first half of a compression stroke or earlier, and allows the ozonator to introduce the ozone into the cylinder. When the engine body operates in the low load range, the controller controls an ozone concentration to be lower at a higher speed than at a low speed.

Abstract: A control device for a compression ignition engine includes a controller configured to operate an engine body by compression ignition combustion when the engine body operates in a predetermined compression ignition range. When the engine body operates in a predetermined high load range of the compression ignition range, the controller maximizes a filling amount of the cylinder using a gas state adjustment system, and lowers an EGR ratio so that the air-fuel mixture in the cylinder is lean with an excess air ratio ? higher than 1 in a lower speed range, and maximizes the filling amount of the cylinder, and increases the EGR ratio so that the air-fuel mixture in the cylinder has the excess air ratio ? of 1 or lower in a higher speed range than the lower speed range.