Patent application number | Description | Published |
20130220284 | AIR AMOUNT ESTIMATING APPARATUS FOR INTERNAL COMBUSTION ENGINE WITH SUPERCHARGER - An air amount estimating apparatus in an internal combustion engine having a supercharger that estimates with high accuracy an amount of air drawn into a cylinder without involving an increased calculation load. The air amount estimating apparatus estimates a cylinder air amount through calculation that incorporates a physical model representing air flowing behavior through an intake path. When, at this time, a ratio of throttle downstream pressure to throttle upstream pressure as calculated with the physical model is smaller than a reference ratio, a throttle flow rate is calculated using an equation of throttle based on the throttle upstream pressure, the throttle downstream pressure, and a throttle opening. When the ratio of the throttle downstream pressure to the throttle upstream pressure is greater than the reference ratio, the throttle flow rate is calculated using a linear interpolation equation based on a compressor flow rate and an intake valve flow rate. | 08-29-2013 |
20150101569 | CONTROLLER FOR INTERNAL COMBUSTION ENGINES - An object of this invention is, with respect to a torque-demand-control type controller that subjects two kinds of actuators provided upstream and downstream in an intake passage to coordinated operations based on a requested torque for an internal combustion engine, to enable realization of a pulse-like torque change in a torque decreasing direction that is requested, for example, when performing an upshift operation in an electronically controlled automatic transmission. To achieve this object, according to a controller for an internal combustion engine of this invention, when a pulse component in a torque decreasing direction is included in a requested torque, a second requested torque that does not include the pulse component is generated. In this case, a first actuator provided on the downstream side in the intake passage is operated based on the requested torque. On the other hand, although a second actuator provided on the upstream side in the intake passage is operated based on the requested torque when there is not a valid value of the second requested torque, the second actuator is operated based on the second requested torque when there is a valid value of the second requested torque. | 04-16-2015 |
20150122234 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE EQUIPPED WITH SUPERCHARGER - An object of the present invention is to detect abnormality of a supercharging pressure sensor accurately in an internal combustion engine equipped with a supercharger that can change a supercharging pressure by operation of an actuator. For this purpose, a control device according to the present invention operates an actuator so that a supercharging pressure measured by a supercharging pressure sensor becomes a target supercharging pressure, acquires a measured value of a flow rate of air flowing in an intake passage, and calculates an estimated supercharging pressure based on the measured air flow rate. The control device according to the present invention sets a first abnormality flag when a first simultaneous inequality is established, which is a simultaneous inequality evaluating magnitude correlation between the measured supercharging pressure, the target supercharging pressure and the estimated supercharging pressure, and is not established when the supercharging pressure sensor is normal. As a result that the first abnormality flag is set, it can be known that abnormality occurs to the supercharging pressure sensor. | 05-07-2015 |
20150134214 | VEHICLE INTEGRATED CONTROL DEVICE - An object of the present invention, in a vehicle integrated control device, is to cause a request torque having an appropriate magnitude and change speed to be given to an engine control unit from a drive system manager. To this end, according to a vehicle integrated control device according to the present invention, a first maximum torque and a second maximum torque are presented to a drive system manager from an engine control unit. The drive system manager refers to the first maximum torque and the second maximum torque which are presented, and determines a request torque to be given to the engine control unit. The first maximum torque is a maximum torque that can be realized when only an operation amount of a throttle is actively changed without actively changing an operation amount of a wastegate valve. The second maximum torque is a maximum torque that can be realized when both the operation amount of the throttle and the operation amount of the wastegate valve are actively changed. | 05-14-2015 |
20150144114 | CONTROLLER FOR INTERNAL COMBUSTION ENGINE WITH SUPERCHARGER - An object of the present invention is to enable monitoring whether a target throttle opening degree to be given to an electronically controlled throttle is not out of an appropriate range, in a controller for an internal combustion engine with a supercharger. To this end, in a controller according to the present invention, propriety of the target throttle opening degree is confirmed with a reference throttle opening degree as a reference by a monitoring device. The target throttle opening degree is calculated based on a target intake air quantity and a measured value or an estimated value of a supercharging pressure by using an inverse model of an air model expressing a dynamic relation that is established among the supercharging pressure, a throttle opening degree and an intake air quantity, by a first arithmetic unit. The reference throttle opening degree is calculated based on the target intake air quantity and a measured value or an estimated value of an atmospheric pressure by using a relational expression that is established between the intake air quantity and an intake pipe pressure in a steady state, and a relational expression that is established among a throttle upstream pressure, the intake pipe pressure and a throttle flow rate in a steady state, by a second arithmetic unit. | 05-28-2015 |
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 |
20150275782 | CONTROL DEVICE FOR ENGINE EQUIPPED WITH SUPERCHARGER - An object of the present invention is to calculate an estimated value of an amount of air blowing through an inside of a cylinder by scavenging that occurs in an engine equipped with a supercharger, that is, a scavenging amount. For this purpose, a control device of an engine equipped with a supercharger according to the present invention calculates an estimated value of an intake valve passing air amount from a measured value of an intake air amount, and calculates an estimated value of an in-cylinder air amount from a measured value or an estimated value of intake pipe pressure. From a difference between the estimated value of the intake valve passing air amount and the estimated value of the in-cylinder air amount, the estimated value of the scavenging amount is calculated. | 10-01-2015 |