Isuzu Motors Limited

Daiki Ishii

Katsushi Shidomi

Yuusuke Kobayashi

Kunio Noda

Fumihiko Okazaki

Hitoshi Sato

Takao Onodera

Naofumi Ochi

Satoshi Hanawa

Yorimasa Tsubota

Takanobu Ogawa

Takuro Mita

Yoshifumi Hanamura

Hotaka Saitou

Kazushige Yamaura

Kentaro Morioka

Tatsuya Tanaka

Yoshihiro Meshimoto

Yuta Kageyama

Akira Matsutani

A control device comprises: a temperature estimating unit for estimating the temperature of a piston of an internal combustion engine of a vehicle; and a control unit which, if the temperature of the piston estimated by the temperature estimating unit has risen to a first threshold corresponding to a heat resisting temperature of the piston, reduces an upper limit value of a fuel injection timing at which a fuel injector for injecting fuel onto the piston injects the fuel, and which increases the upper limit value of the fuel injection timing at a higher temperature than the first threshold when the rise in temperature of the piston stops.

Control device

A NOx generation amount control device includes: a cumulative amount calculating part calculating a cumulative NOx amount obtained by adding together a plurality of NOx exhaust amounts calculated for each prescribed time interval; a specifying part specifying a target value of the cumulative NOx amount associated with a movement distance of a moving body or an output value of an engine; an estimating part estimating a predicted NOx amount indicating a predicted cumulative NOx amount based on a rotation speed of the engine and a fuel injection amount; a judging part judging whether the sum of the predicted NOx amount and the cumulative NOx amount exceeds the target value; and a determining part determining a scheduled NOx exhaust amount and determining at least one of an opening degree of the EGR valve and an opening degree of a turbocharger.

NOx generation amount control device

A detection device detecting collapse of PM collected in a filter provided in an exhaust system flow path of an internal combustion engine includes: a differential pressure sensor configured to acquire a differential pressure between an exhaust inlet side and an exhaust outlet side of the filter; a water generation determination unit configured to determine whether water is generated in the exhaust system flow path; and a PM collapse determination unit configured to determine that at least a part of the PM collected in the filter has collapsed when a PM accumulation amount estimated based on the acquired differential pressure has increased by a predetermined amount or more within a predetermined period in a state where the PM accumulation amount estimated based on the acquired differential pressure is equal to or larger than a predetermined first threshold and the water generation determination unit has determined that water is generated.

Detection device, detection method, and exhaust purification device with detection device

The error diagnosis device has: an input unit that receives a downstream pressure value and an upstream pressure value, said downstream pressure value being detected on the downstream side of a fuel pump and said upstream pressure value being detected on the upstream side of the fuel pump; and a determination unit that, if the downstream pressure value is less than a preset first threshold value, determines whether or not the upstream pressure value is less than a preset second threshold value. The determination unit determines that an error has occurred further upstream than the fuel pump if the upstream pressure value is less than the second threshold value and determines that an error has occurred in the fuel pump if the upstream pressure value is at least the second threshold value.

Error diagnosis device and error diagnosis method

The error diagnosis device has: an input unit that receives detected values for pressure inside the common rail; a calculation unit that, if the detected values are less than a target common rail pressure, calculates the pressure differences and the fuel pump discharge amounts; and a determination unit that determines whether or not a set time has lapsed in a state in which the pressure differences are at least a first threshold value and less than a second threshold value and the discharge amounts are at least a third threshold value and less than a fourth threshold value. The determination unit determines that an error has occurred in the high-pressure pump if the set time has lapsed and determines that an error has occurred in the flowrate adjustment valve if the set time has not lapsed.

Growing community of inventors

Fujisawa, Japan

Daiki Ishii