Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Shinya Matohara

Yoshihiko Akagi

Kazuhiro Oryoji

Seiji Asano

Kunihiko Suzuki

Motoyuki Abe

Takuya Mayuzumi

Akira Kotabe

Tetsuo Matsumura

Kengo Kumano

Yoshinobu Arihara

Oryoji Kazuhiro

Provided is an internal combustion engine control device capable of appropriately correcting a flow rate of EGR gas. Therefore, an internal combustion engine control deviceincludes moisture amount calculation unitsand, a dew condensation calculation unit, and an EGR correction unit. The moisture amount calculation unitcalculates a total moisture amount contained in the mixed gas. The dew condensation calculation unitcalculates a dew condensation generation amount WQcon in an intercooler based on the total moisture amount. The EGR correction unitcorrects a flow rate of the EGR gas based on the dew condensation generation amount WQcon.

Internal combustion engine control device

Provided is a vehicle-mounted system capable of transmitting a command to a first system from a second system during a period in which the first system communicates with the second system according to a unidirectional communication protocol. A vehicle-mounted systemincludes a sensor(first system) and an ECU (second system). The sensoroutputs a message signal including a pause pulse to the communication line DATA according to SENT (a unidirectional communication protocol). The ECUis connected to the communication line DATA, and transmits a command to the sensorusing the falling period of the pause pulse.

Vehicle-mounted system

Provided is an internal combustion engine control device capable of more appropriately correcting an output value of a flow rate sensor that measures a flow rate of air flowing through an intake flow path of an internal combustion engine, and further reducing an error between a corrected air flow rate and an actual air flow rate as compared to a conventional device. For this purpose, the internal combustion engine control device of the present invention includes an arithmetic deviceincluding a fundamental frequency derivation unitthat derives a fundamental frequency, a flow rate amplitude calculation unitthat extracts a radio frequency of a plurality of frequencies equal to or higher than the fundamental frequency from a pulsation waveform based on the output value of the flow rate sensor as a flow rate radio frequency and calculates an amplitude of the flow rate radio frequency for each frequency, a correction amount derivation unitthat derives a correction amount based on the amplitude of the flow rate radio frequency for each frequency, and a flow rate calculation unitthat calculates a flow rate of air by using the output value of the flow rate sensor and the correction amount.

An object is to provide a control device that calculates an intake pipe pressure of an engine, in which the humidity of air is measured, and a change in a gas constant due to a change in the total number of moles of air is corrected, to improve the accuracy of the calculation value of the intake pipe pressure. A control device that controls an engine provided with an air amount measurement unit that measures an air amount passing through a throttle throttle valve provided in an intake passage of the engine, and a humidity measurement unit that measures a humidity of air passing through the throttle throttle valve, includes: an air amount calculation unit that calculates an air amount flowing into a cylinder of the engine based on a measurement result of the air amount measurement unit; and a pressure calculation unit that calculates a pressure of the intake manifold on a downstream side of the throttle throttle valve based on the air amount measured by the air amount measurement unit, the air amount calculated by the air amount calculation unit, and the humidity measured by the humidity measurement unit.

Control device

An EGR rate estimation method using an EGR valve opening area involves aggravated EGR rate estimation accuracy as an EGR valve is deteriorated and is unable to satisfy required accuracy when a target EGR rate is high. With a method for correcting a fuel injection amount by a fuel injection valve through estimation of a purge air-fuel ratio on the basis of variations in an air-fuel ratio variable depending on whether purging is performed, the fuel injection correction fails to accommodate the change in the air-fuel ratio when concentration of fuel evaporative emissions adsorbed by an activated carbon of a canister is high, resulting in reduced conversion efficiency of a catalyst. An arrangement includes an introduction port that is disposed in an intake pipe and through which a gas other than fresh air flows in the intake pipe and humidity sensors disposed upstream and downstream, respectively, of the introduction port. The EGR rate or the purge air-fuel ratio in the intake pipe is estimated using detection values of the respective humidity sensors.

Control apparatus for internal combustion engine

A control apparatus for a direct injection type engine is provided for reducing an amount of fuel that adheres to and that remains on a crown surface of a piston so as to suppress the increase of Number of particles as well as advancing the first injection as much as possible when plural fuel injections are carried out in one cycle in the direct injection type engine. The first injection timing is set based on a pulse width of at least the first injection among each of injections split plural times, and when the pulse width of the split first injection is short, the injection timing of the first injection is more advanced as compared with a case of a longer pulse width of the split first injection.

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Hitachinaka, Japan

Shinya Matohara