Patent application number | Description | Published |
20120215423 | CONTROL DEVICE FOR MULTI-CYLINDER INTERNAL COMBUSTION ENGINE EQUIPPED WITH VARIABLE COMPRESSION RATIO MECHANISM - A control device for a multi-cylinder internal combustion engine that is equipped with a variable compression ratio mechanism includes an air-fuel ratio sensor, and a controller that determines whether or not actual mechanical compression ratios in cylinders of the internal combustion engine are uniform. The controller controls the variable compression ratio mechanism by decreasing a target mechanical compression ratio from a current first target mechanical compression ratio to a second target mechanical compression ratio without changing the amount of intake air and a fuel injection amount, and determines that the actual mechanical compression ratios in the cylinders are not uniform when the target mechanical compression ratio is set at the first target mechanical compression ratio if the differences in the output air-fuel ratios from the air-fuel ratio sensor for exhaust gases from the cylinders before and after the control of the variable compression ratio mechanism are not uniform. | 08-23-2012 |
20120279476 | SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE - An internal combustion engine which is provided with a variable compression ratio mechanism which can change a mechanical compression ratio and a variable valve timing mechanism which can control a closing timing of an intake valve. A target operating point which can be reached after a fixed time without entering no-entry regions from the current operating point toward an operating point which satisfies the demanded intake air amount is calculated for an operating point which shows a combination of the mechanical compression ratio and the closing timing of the intake valve when the demanded intake air amount changes, and the mechanical compression ratio and the closing timing of the intake valve are made to change toward this target operating point. | 11-08-2012 |
20120304968 | SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE - An internal combustion engine which is provided with a variable compression ratio mechanism which can change a mechanical compression ratio and a variable valve timing mechanism which can control a closing timing of an intake valve. No-entry regions (X | 12-06-2012 |
20150128911 | INTERNAL COMBUSTION ENGINE PROVIDED WITH VARIABLE COMPRESSION RATIO MECHANISM - This internal combustion engine is provided with a variable compression ratio mechanism capable of changing a mechanical compression ratio by changing the volume of the combustion chamber at the top dead center. The pressure and temperature of remaining combusted gas within the combustion chamber at the time when the exhaust valve is closed in the intake stroke is measured or estimated, the pressure and temperature of intake air supplied into the combustion chamber after the exhaust valve is closed in the intake stroke is measured or estimated, and based on the assumption that the pressure and temperature of the remaining combusted gas which saturates the volume of the combustion chamber at the time when the exhaust valve is closed in the air intake stroke become, when the intake air is supplied to the combustion chamber, equal to the pressure and temperature of the intake air, the volume of the remaining combusted gas after the change is calculated. | 05-14-2015 |
20150136092 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An object of this invention is to appropriately control the valve timing (VT) even in a case where a plurality of local maximum points or local minimum points exist on a characteristic line representing a relation between the VT and an air amount. An engine | 05-21-2015 |
20150152804 | INTERNAL COMBUSTION ENGINE CONTROL DEVICE - This invention has an object to enable update of learning values of a large number of grid points in one session of a learning operation and also to easily adjust learning speed and efficiency in a wide learning region. | 06-04-2015 |
20150159546 | CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE EQUIPPED WITH TURBO SUPERCHARGER - An object of the present invention is to improve controllability over a supercharging pressure in a transient state, in a control device of an internal combustion engine equipped with a turbo supercharger that determines a manipulated variable of an actuator which acts on a rotational speed of a turbine by feedback control based on a deviation between a target state quantity and an actual state quantity. To this end, a control device according to the present invention determines an opening degree of a throttle by feedforward control based on a target intake air amount, and determines a manipulated variable of the actuator by feedback control based on a deviation between a target intake pressure determined from the target intake air amount and an actual intake pressure. | 06-11-2015 |
20150184606 | CONTROL APPARATUS FOR SUPERCHARGED ENGINE - It is an object of the invention to enhance the possibility of realizing a required torque in a supercharging region where scavenging occurs in a control apparatus for a supercharged engine. In order to achieve this object, the control apparatus for the supercharged engine according to the invention determines an operation amount of an intake valve driving device from a target in-cylinder air amount that is calculated from a required torque, and determines an operation amount of a throttle from a target intake valve passing air amount that is obtained by adding an amount of air blowing through an interior of a cylinder to the target in-cylinder air amount. | 07-02-2015 |