Yanmar Co., Ltd.

Johns Hopkins University

Tomohiro Otani

Hitoshi Adachi

Hideo Shiomi

Fumiya Kotou

Atsuhito Iwase

Tomohiro Fukuda

Shusuke Okada

Yasuaki Oku

Yuki Fujimoto

Hiroshi Ashikaga

An engine includes a fuel injector, an atmospheric pressure sensor, and an engine controller coupled to the fuel injector. The atmospheric pressure sensor detects the atmospheric pressure. The engine controller includes a first control device and a second control device. The first control device is configured to determine whether the engine is in a steady state or a transient state. The second control device is configured to calculate a fuel injection timing in the steady state, a the fuel injection timing in the transient state, and an atmospheric pressure correction process for correcting the fuel injection timing on the basis of the atmospheric pressure. The atmospheric correction process is performed only in the steady state to avoid redundancy. The engine controller outputs a final injection timing to the fuel injector as a result of the calculated fuel injection timing and the calculated atmospheric correction process.

Engine controller based on atmospheric pressure

The present application relates to systems and methods for performing a computerized cardiac simulation for at least one of diagnosis, risk assessment or treatment planning including: receiving, by a computer, a plurality of three-dimensional cardiac images of a subject's heart such that each three-dimensional cardiac image corresponds to a different phase of a single cardiac cycle of the subject's heart; modeling structure, using the computer, of the left atrium of the subject as a function of time using the plurality of three-dimensional cardiac images of the subject's heart; modeling blood flow, using the computer, within, into and out of the left atrium of the subject as a function of time using computational fluidic dynamics and using structure of said left atrium obtained from at least one of said plurality of three-dimensional cardiac images or said modeling structure of said left atrium; simulating at least one of time dependent structural function or time-dependent blood flow of said left atrium using results from said modeling structure and said modeling blood flow for a selected period of time; and providing information to a user from said simulating for use in at least one of diagnosis, risk assessment or treatment planning for a physiological effect related to function of said left atrium of the subject.

Patient-specific virtual intervention laboratory to prevent stroke

The objective of the present invention is to provide an engine with improved startability and stable operation regardless of the driving environment and usage conditions. The engine is equipped with a control means, which calculates a standard injection timing on the basis of the target rotational frequency of the engine and a standard injection amount, that is, the amount of fuel injected, and which corrects the standard injection timing using at least one correction amount. A fuel injection control unit calculates a cooling water correction amount on the basis of the target rotational frequency of the engine, the standard injection amount, and the cooling water temperature, and when the cooling water temperature is less than a first prescribed temperature the control unit corrects the standard injection timing using only the cooling water correction amount.

Engine

An engine includes a control means that calculates a standard injection time based on the target number of revolutions of the engine and a standard injection amount being a fuel injection amount of the engine and corrects the standard injection time based on at least a correction amount, and a fuel injection control unit calculates a coolant correction amount based on the target number of revolutions, the standard injection amount, and a coolant temperature of the engine, and when the coolant temperature is less than a first predetermined temperature, the fuel injection control unit corrects the standard injection time only based on the coolant correction amount.

The purpose of the present invention is to provide an engine having a revision means which regulates rotation speed of each of cylinders while reflecting specific unevenness of rotation of each of the cylinders. With regard to an enginehaving a plurality of cylinders wherein opening timing of each of injectorscan be controlled respectively, comprising an individual standard rotation speed output unitwhich outputs individual standard rotation speed Nstdi of each of the cylinders following fuel injection of the corresponding injectorwhen all the injectorsare in normal state, an engine rotation speed sensorwhich detects individual actual rotation speed Ni of each of the cylinders following the fuel injection of the corresponding injector, and a revision amount calculation unitwhich calculates revision amount of fuel injection amount to each of the cylinders from the corresponding injectorbased on difference between the individual standard rotation speed Nstdi stored in the individual standard rotation speed output unitand the individual actual rotation speed Ni calculated by the engine rotation speed sensor

In an engine which may show a behavior where an engine speed is not always minimized after compression top dead center of a cylinder in which poor fuel injection occurred, the cylinder in which poor fuel injection occurred is detected. A common rail diesel engine () includes a individual reference number-of-revolutions output unit () for outputting the individual reference number of revolutions Nstdi of each cylinder corresponding to each injector () incident to fuel injection thereof, an engine speed sensor () for calculating the individual actual number of revolutions Ni of each cylinder corresponding to each injector () incident to fuel injection thereof, and fuel injection failure detection means for judging a cylinder temporarily judged as poor fuel injection as a cylinder of poor fuel injection when the plus and minus by a contrast arithmetic operation unit () coincide entirely in each cylinder and the absolute value |&#x394;Ni'| of the difference in number of revolutions at the time of forced stop means is entirely above the absolute value |&#x394;Ni| of the difference in the number of revolutions at the time of temporary judgment means.

A propulsion apparatus for synchronizing the revolution speeds of a plurality of engines, each engine having a screw propeller shaft. A single regulator lever synchronously adjusts a revolution speed of the propeller shafts of the engines. When an output rpm of one of the engines has dropped, a control means lowers the revolution speed of the propeller shafts of the remaining engines to a revolution speed which is synchronized to the revolution speed of the propeller shaft of the engine whose rpm has dropped. Synchronization of revolution speeds of the remaining engines with the engine having reduced output rpm is terminated if the output rpm of that engine falls below a predetermined threshold.

Multi-cylinder engine fuel control method, engine fuel injection amount control method and engine operation state discrimination method using the same, propulsion apparatus for multiple engines, and fuel injection control method during crash astern in marine engine with reduction and reversal device

A high-pressure pump () for providing a pressurized supply of fuel in an engine furnished with a common rail type fuel injection apparatus is provided with two actuators (). Of these actuators (), one () is stopped and the operation for providing a pressurized supply of fuel is performed from only the other actuator (), so that the timing at which the load torque that acts on the crankshaft of the engine becomes a local maximum and the timing at which the load torque that acts on the driveshaft of the high-pressure pump () becomes a local minimum are made to coincide with one another.

Accumulator-type fuel injection apparatus and internal combustion engine provided with that accumulator-type fuel injection apparatus

Rotation recognition means for recognizing a revolution of a crankshaft based on the cylinders before the combustion cycle of a cylinder in question is provided. When the supply of fuel by injection from an injector to a certain cylinder of the six cylinders has become impossible, then control is performed to change the number of cylinders targeted by the rotation recognition means so as to recognize the revolution of the crankshaft for all six cylinders whose combustion cycles are consecutive prior to the combustion cycle of the cylinder in question, and to stop the supply of fuel from the injectors for supplying fuel to cylinders whose combustion cycles are equally spaced from the cylinder to which the supply of fuel is not possible, so that the spacing between the combustion cycles in the cylinders whose combustion cycles come before and after and sandwich the cylinder to which the supply of fuel is not possible becomes uniform.

A fuel control method which recognizes a revolution of a crankshaft based on the cylinders before the combustion cycle of a cylinder in question. When the supply of fuel by injection from an injector to a certain cylinder of the six cylinders has become impossible, then control is performed to change the number of cylinders targeted by the rotation recognition means so as to recognize the revolution of the crankshaft for all six cylinders whose combustion cycles are consecutive prior to the combustion cycle of the cylinder in question, and to stop the supply of fuel from the injectors for supplying fuel to cylinders whose combustion cycles are equally spaced from the cylinder to which the supply of fuel is not possible, so that the spacing between the combustion cycles in the cylinders whose combustion cycles come before and after and sandwich the cylinder to which the supply of fuel is not possible becomes uniform.

In one embodiment, the high-pressure pump () for providing a pressurized supply of fuel in an engine furnished with a common rail type fuel injection apparatus is provided with two actuators (). Of these actuators (), one () is stopped and the operation for providing a pressurized supply of fuel is performed from only the other actuator (), so that the timing at which the load torque that acts on the crankshaft of the engine becomes a local maximum and the timing at which the load torque that acts on the driveshaft of the high-pressure pump () becomes a local minimum are made to coincide with one another.

A fuel injection start timing is determined based on the engine revolution or the engine load, and a common rail pressure is detected simultaneous to this fuel injection start timing. The fuel injection duration is then calculated based on the detected value of the common rail pressure. By doing this, it is possible to obtain a fuel injection duration that is suited for the common rail pressure at the actual fuel injection start time, resulting in an appropriate injection amount.

Pressure accumulation-type fuel injection device and internal combustion engine provided with this pressure accumulation-type fuel injection device

An engine revolution in an expansion stroke of a cylinder is calculated, and stored, from a time that is required for a crank shaft to rotate by a predetermined angle from a compression upper dead center of that cylinder, and to determine the fuel injection amount, in averaging these stored revolutions from the cylinder immediately prior to a cylinder before the cylinder that is immediately prior to obtain a revolution that serves as the engine revolution, how many past cylinders are retroactively averaged is switched according to the engine operation state.

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Osaka, Japan

Tomohiro Otani