Patent application number | Description | Published |
20090173307 | INTERNAL COMBUSTION ENGINE - Disclosed is an internal combustion engine (A), which has a valve overlap period (T) during which an intake valve ( | 07-09-2009 |
20090173312 | INTERNAL COMBUSTION ENGINE - Disclosed is an internal combustion engine, which has a geometric compression ratio of 13.0 or greater, and a combustion chamber ( | 07-09-2009 |
20090216427 | METHOD AND SYSTEM FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - Methods and systems for controlling an internal combustion engine are provided. One example method may include closing an intake valve later during a cylinder cycle than a timing with which an amount of air inducted into a cylinder from an air intake passage would be maximized, and earlier during the cylinder cycle as a desired amount of air to be inducted into the cylinder increases, while an engine is operating at a given engine speed. The method may further include closing the intake valve earlier during a cylinder cycle as the engine speed increases when the desired amount of air to be inducted into the cylinder is at a maximum. | 08-27-2009 |
20090217906 | INTERNAL COMBUSTION ENGINE CONTROL METHOD AND INTERNAL COMBUSTION ENGINE SYSTEM - A system and method of controlling an internal combustion engine are provided. The method may include closing said intake valve at a timing in a first range, which is before a maximum charge closing timing with which an amount of air inducted into said cylinder from said air intake passage would be maximized at a given engine speed, during a cylinder cycle when a desired amount of air to be inducted into said cylinder is less than or equal to a predetermined air amount at the given engine speed. The method may further include closing said intake valve at a timing in a second range, which is after said maximum charge closing timing and separated from said first range during a cylinder cycle, when a desired amount of air to be inducted into said cylinder is greater than said predetermined air amount at the given engine speed. | 09-03-2009 |
20100077990 | CONTROL OF SPARK IGNITED INTERNAL COMBUSTION ENGINE - There is provided a method of controlling a spark ignited internal combustion engine having a fuel injector which injects fuel directly into its combustion chamber. The method comprises injecting a total amount of fuel into a combustion chamber by early in a compression stroke during a cylinder cycle at a first engine speed. The method further comprises injecting a first stage of fuel into the combustion chamber during a cylinder cycle by an early in a compression stroke of the cylinder cycle, and injecting a second stage of fuel by late in the compression stroke during the cylinder cycle at a second engine speed less than the first engine speed, after injecting the first stage of fuel. The amount of the second stage fuel is greater than an amount of said first stage fuel. Accordingly, the first and second stage fuels may not be pre-ignited before the spark ignition. | 04-01-2010 |
20100242899 | SUPERCHARGED DIRECT FUEL INJECTION ENGINE - Various systems and methods are disclosed for controlling an internal combustion engine system having an internal combustion engine, a fuel injector which directly injects fuel into a combustion chamber of the internal combustion engine, and a supercharger which supercharges air into the combustion chamber. One example method comprises, injecting fuel into the combustion chamber multiple times so that a first part of the fuel is self ignited and a last part of the fuel being injected during the compression stroke or later in a cylinder cycle when a desired torque of said internal combustion engine system is in a first range; and increasing a pressure of air which the supercharger charges into the combustion chamber as amount of fuel injected into the combustion chamber during a cylinder cycle increases when the desired torque is in the first range. | 09-30-2010 |
20100242900 | CONTROL OF DIRECT FUEL INJECTION ENGINE - Various systems and methods are disclosed for controlling an internal combustion engine system having an internal combustion engine, and a fuel injector which directly injects fuel into a combustion chamber of the internal combustion engine. One example method comprises, when a desired torque for the internal combustion engine system is in a first range, injecting a first stage fuel into the combustion chamber so that it ends during a middle stage of a compression stroke at the latest in a cylinder cycle; determining combustion of the first stage fuel initiated by its compression self-ignition; and injecting a second stage fuel into the combustion chamber in a period when the determined combustion of the first stage fuel continues at a timing determined so as to cause combustion of the second stage fuel with its compression self-ignition. | 09-30-2010 |
20110079194 | COMBUSTION TIMING PREDICTION METHOD FOR COMPRESSION SELF-IGNITION INTERNAL COMBUSTION ENGINE, CONTROL METHOD FOR COMPRESSION SELF-IGNITION INTERNAL COMBUSTION ENGINE, AND COMPRESSION SELF-IGNITION INTERNAL COMBUSTION ENGINE SYSTEM - A combustion timing prediction method for a compression self-ignition internal combustion engine includes the steps of: specifying types of a plurality of hydrocarbon components contained in a hydrocarbon fuel and proportions of the respective types in the hydrocarbon fuel; calculating, on the basis of a temperature in a combustion chamber of the internal combustion engine, a value of a first function serving as a function of the temperature for each of the types; calculating, on the basis of the proportion and the first function relating to each of the types, a value of a second function, which is a function that increases in value in response to an increase of the value of the first function and/or the proportion, for each of the types; integrating the values of the second function relating to the respective types; and predicting, on the basis of the integrated value of the values of the second function, the combustion timing of the hydrocarbon fuel in the internal combustion engine to be steadily later as the integrated value increases. As a result, the combustion timing of the hydrocarbon fuel in the compression self-ignition internal combustion engine can be predicted with maximum accuracy. | 04-07-2011 |
20120216775 | CONTROL DEVICE OF SPARK-IGNITION GASOLINE ENGINE - The disclosure provides a control device of a spark-ignition gasoline engine. When an operating state of an engine body is within a low engine speed range, a controller operates a fuel pressure variable mechanism so that a fuel pressure is higher within a high engine load range compared to a low engine load range, the controller operates, within the high engine load range, a fuel injection mechanism to perform at least a fuel injection into the cylinder by a cylinder internal injection valve at a timing during a retard period from a late stage of a compression stroke to an early stage of an expansion stroke, and the controller operates, within the high engine load range, an ignition plug to ignite at a timing during the retard period and after the fuel injection. | 08-30-2012 |
20130047958 | CONTROL METHOD OF SPARK IGNITION ENGINE AND SPARK IGNITION ENGINE - A control method of a spark ignition engine and a spark ignition engine capable of warming up an engine more promptly while promptly activating a catalyst are provided. Implemented is the control of igniting a mixture at an ignition timing that is set on a more lag side than an MBT, which is an ignition timing in which an output torque of the engine becomes maximum until the catalyst | 02-28-2013 |
20140060489 | SPARK-IGNITION DIRECT INJECTION ENGINE - A spark-ignition direct injection engine is provided. The engine includes an engine body, a fuel injection valve, a fuel pressure setting mechanism, an ignition plug, and a controller. The controller operates the engine to perform compression-ignition combustion within a first operating range, and controls the ignition plug to operate the engine to perform spark-ignition combustion within a second operating range. Within a specific part of the first range, the controller sets the fuel pressure to 30 MPa or above, and retards the compression ignition to after a compression top dead center by controlling the injection valve to inject fuel into a cylinder in a period from a late stage of compression stroke to an early stage of expansion stroke. Below the specific part, the controller controls the fuel injection valve to inject the fuel into the cylinder in a period from intake stroke to a mid-stage of the compression stroke. | 03-06-2014 |
20140060490 | SPARK-IGNITION DIRECT INJECTION ENGINE - A spark-ignition direct injection engine is provided. The engine includes an engine body, a fuel injection valve, a fuel pressure setting mechanism, an ignition plug, and a controller. Within a low engine speed operating range of a predetermined high engine load range, the fuel pressure setting mechanism sets a fuel pressure to 30 MPa or above, the fuel injection valve injects fuel between late stage of compression stroke and early stage of expansion stroke, and the ignition plug performs spark-ignition after the fuel injection completes. Within a high engine speed operating range of the high engine load range, the fuel injection valve injects fuel between intake stroke to mid-stage of compression stroke, and the ignition plug performs the spark-ignition. The ignition timing is changed according to an octane number, the changing width of the ignition timing is shorter within the low engine speed range than the high engine speed range. | 03-06-2014 |
20140299107 | CONTROL SYSTEM AND CONTROL METHOD OF SPARK IGNITION GASOLINE ENGINE - An engine body includes a cylinder with a geometrical compression ratio of 15 or higher, and is supplied with fuel containing at least gasoline. When an operating mode of the engine body is in a high load range, a controller (i.e., a PCM | 10-09-2014 |
20150083072 | CONTROL DEVICE OF COMPRESSION-IGNITION ENGINE - A control device of a compression-ignition engine is provided. The control device includes the engine having a cylinder, an exhaust gas recirculation system for introducing exhaust gas into the cylinder, and a controller for operating the engine by compression-ignition combustion of mixture gas inside the cylinder within a predetermined compression-ignitable range on a low engine load side. Within the compression-ignitable range, the controller sets an EGR ratio higher as the engine load becomes lower, and the controller sets the EGR ratio to a predetermined highest EGR ratio when the engine load is at a specific load that is on the low engine load side within the compression-ignitable range. When the engine load is lower than the specific load, the controller sets the EGR ratio to be lower than the highest EGR ratio. | 03-26-2015 |
20150083073 | CONTROL DEVICE OF COMPRESSION-IGNITION ENGINE - A control device of a compression-ignition engine is provided. The device includes an engine having a cylinder, a fuel injection valve for injecting a fuel, an exhaust valve mechanism for switching an operation mode of an exhaust valve between a normal mode and an open-twice mode, a throttle valve disposed on an intake passage, and a controller for operating the engine by compression-ignition combustion of mixture gas inside the cylinder at least within a low engine load range. The controller suspends the fuel injection by the fuel injection valve when a predetermined fuel cut condition is met while the engine decelerates, and the controller fully closes the throttle valve and controls the exhaust valve mechanism to operate in the open-twice mode during the fuel cut. When a predetermined fuel resuming condition is met, the controller restarts the fuel injection, opens the throttle valve, and causes the compression-ignition combustion. | 03-26-2015 |