Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Hitachi, Ltd.

Hitachi Car Engineering Co., Ltd.

Other

Nissan Motor Company Limited

Yoshihiko Akagi

Kazuhiro Oryoji

Seiji Asano

Shinya Matohara

Hidefumi Iwaki

Shinsaku Tsukada

Takuto Okamoto

Toshio Hori

Kunihiko Suzuki

Masashi Seimiya

Kengo Kumano

Masakatsu Fujishita

Kenji Ono

Shigemi Oono

Sadato Horiuchi

Keiji Hanzawa

Hiroshi Kimura

Takuya Shiraishi

Hatsuo Nagaishi

Hiroshi Hirayama

Takeshi Morino

Yoshihiro Sukegawa

Nobuo Kurihara

Shoji Sasaki

Tetsuya Iwasaki

Yoichi Iihoshi

Masahiro Sato

Hiroyuki Ota

Kenichiroh Ogata

Takayasu Matsushita

Kazuhiko Miya

Hidefumi Hatsuzawa

Makoto Kawano

Takuya Tanaka

Masaru Shibano

Wataru Katou

Masanori Nukui

Kohei Suseki

Oryoji Kazuhiro

This in-vehicle control device includes: a cooling period setting unit that sets a timing prior to the start timing of a predicted knock occurrence period as the increasing timing of a cooling amount of a combustion room, and sets a timing prior to an end timing of the predicted knock occurrence period as the decreasing timing of the cooling amount of the combustion room; and a cooling amount change unit that changes the cooling amount of the combustion room by a cooling mechanism on the basis of the set increasing and decreasing timings and a target cooling amount set by a target cooling amount setting unit.

In-vehicle control device and method for controlling internal combustion engine

Provided is a control device for an internal combustion engine capable of realizing an operation of the internal combustion engine in a state in which a dilution is close to a limit. A processor (CPU) of a control device for an internal combustion engine calculates a change amount of a parameter (for example, a combustion center position) indicating a combustion state of the internal combustion engine (combustion center change amount calculation unit). The processor (CPU) corrects an operation amount of an actuator (for example, an EGR valve) that adjusts a dilution of an air-fuel mixture according to a difference between the change amount of the parameter indicating the combustion state and a target value of the change amount, and brings the change amount close to the target value (actuator operation amount correction unit).

Control device for internal combustion engine

An object of the present application invention is to provide a throttle valve control device capable of effectively cooling a bearing of a throttle shaft while preventing an increase in size of a throttle body. Therefore, in a throttle valve control device in which flow pathsTtoTthrough which a heat exchange medium flows are formed in a throttle body, the diameter of a first bearingof a throttle shaftis greater than the diameter of a second bearing, the flow pathsTtoTare disposed along an outer periphery of an intake passageto overlap with the second bearingwhen viewed from a flow direction of the intake passage, and an inlet portionTand the outlet portionTof the flow pathsTtoTare disposed to sandwich the first bearing

Throttle valve control device

An internal combustion engine control device includes an engine state estimation unit, a wall surface temperature estimation unit, and an operation amount calculation unit. The engine state estimation unit calculates the energy transfer amount from the gas to the wall surface based on the parameter related to the operating condition, the parameter related to the chemical condition of combustion, and the parameter related to an operation status. The wall surface temperature estimation unit estimates the wall surface temperature on the basis of the energy transfer amount from the gas to the wall surface. The operation amount calculation unit calculates an operation amount of an actuator provided in the internal combustion engine on the basis of the wall surface temperature estimated by the wall surface temperature estimation unit.

Internal combustion engine control device

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.

Provided is a signal processing device capable of effectively reducing a work load of a parameter setting operator in response to an increase in parameters constituting complicated filter control. Therefore, in the signal processing device filters an output signal from a sensor mounted on a vehicle, setting is made with respect to a plurality of filters having different filter types or filter coefficients for setting a filter characteristic of a cutoff frequency or a pass band, an individual code is set for each of the plurality of filters, and the signal processing device includes a CPU that selects the individual code based on an engine operating state so that a corresponding filter is selected, and processes an output signal from the sensor using the filter that has been selected.

Signal processing device, and engine control device

Provided is an internal combustion engine control device capable of reducing a measurement load and calculating a flow velocity around an ignition plug. The internal combustion engine control device includes an inter-gap voltage calculation unitand a flow velocity calculation unit. The inter-gap voltage calculation unitcalculates a reference inter-gap voltage under a reference condition, based on a secondary current and in-cylinder pressure. The flow velocity calculation unit calculates the flow velocity of a gas around the ignition plug based on the reference inter-gap voltage.

Due to changes in a flow of an air-fuel mixture in a cylinder, reliable ignition due to spark discharge may not be possible. Therefore, an ignition control unitincludes a secondary voltage calculation unitthat calculates an average value of a secondary voltage generated on a secondary side of an ignition coil, an irregular flow ratio calculation unitthat calculates a ratio of cycles in which the average value of the secondary voltage is equal to or less than a set average value with respect to a cycle of the internal combustion engine in a predetermined period as an irregular flow ratio indicating that the flow of the air-fuel mixture in the cylinder is irregular, and an ignition operation amount correction unitthat corrects an ignition operation amount so that the irregular flow ratio is equal to or less than the set ratio value that is the target to be reached of the irregular flow ratio.

Control device

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.

Provided is a knocking detection apparatus capable of reducing erroneous determination of knocking during transition, and improving knocking detection accuracy regardless of whether an engine is in steady operation or transient operation. A knocking detection apparatus according to the present invention estimates a background level based on an operating state of an internal combustion engine, and calculates a knocking determination index by using the estimated value.

Knocking detection apparatus and internal combustion engine control apparatus

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.

Fuel injection control of an internal combustion engine requires an optimized fuel amount that can be burned completely with oxygen in intake air to be supplied, but the oxygen concentration in the atmospheric air is affected by humidity. By separately calculating a dry air flow rate that directly affects the oxygen amount and a humidity flow rate that is a change factor of the oxygen concentration in the intake air of the internal combustion engine, the fuel can be supplied to the cylinder of the internal combustion engine at an optimized air-fuel ratio. In addition, highly precise control involving EGR for flowback of a part of the exhaust gas flowing in the exhaust pipe to the intake pipe can also be achieved.

Internal combustion engine control apparatus

Introduction of a low fuel consumption technique such as downsizing turbos and idling stop decreases an intake pipe negative pressure (pump loss) of an internal combustion engine, and results in difficulty in emitting (evaporative fuel purge) a volatile fuel (volatile fuel) in a fuel tank by the negative pressure of the intake pipe of the internal combustion engine. A control device includes: a purge control unit which controls a purge valve which emits a volatile fuel of a fuel tank or a canister to an intake pipe of an internal combustion engine; and a power transmission control unit which controls a power transmission mechanism between the internal combustion engine and a drive wheel, and, in a state where the power transmission control unit disconnects a clutch, and the vehicle is coasting, the purge control unit opens the evaporative fuel valve and purges an evaporative fuel to the intake pipe.

Control device that stops fuel injection to an engine during coasting

An onboard control device has a drive manipulated variable detection unit () for determining a drive manipulated variable manipulated by a driver to impart a propulsive force to a vehicle, a command value calculation unit () for calculating a command value for a drive source of the vehicle based on the drive manipulated variable, a propulsive force control unit () for controlling the propulsive force based on the command value, operating state detection units () for determining the operating states of the drive source, a drive manipulation rate of change calculation unit () for calculating the rate of change in drive manipulation, an operating state rate of change calculation unit () for calculating the rate of change in the operating state, and an abnormality detection unit () for detecting abnormalities in the drive source based on the rates of change in drive manipulation and the operating state.

Growing community of inventors

Hitachinaka, Japan

Yoshihiko Akagi