Yanmar Power Technology Co., Inc.

Yanmar Holdings Co., Ltd.

Keiji Kunisawa

Masahiro Itani

Hideo Shiomi

Katsunari Jonouchi

A control device is configured to estimate a soot deposition amount (PM deposition amount) in a DPF for an exhaust purification device that is configured to purify exhaust of a diesel engine using the DPF, and determine a regeneration timing for the diesel engine based on the estimated PM deposition amount. As a technique of determining the regeneration timing, the control device employs a first determination technique of detecting that the PM deposition amount is a first threshold or more and a state in which the PM deposition amount is the first threshold or more has continued for a first predetermined time and a second determination technique of detecting that the PM deposition amount is a second threshold (>the first threshold) or more and a state in which the PM deposition amount is the second threshold or more has continued for a second predetermined time.

Particle deposition amount estimation device and exhaust purification system

An engine control device controls an engine provided with an EGR device. The engine control device is provided with an abnormality determining unit, a restricted operation unit, and a restriction released operation unit. The abnormality determining unit determines whether an abnormality has arisen in the EGR device. The restricted operation unit performs restricted operation in which some functions of the engine are restricted, if the abnormality determining unit has determined that an abnormality has arisen in the EGR device. If a manipulation to release the restricted operation has been performed, the restriction released operation unit switches from restricted operation to restriction released operation in which the restrictions on some of the functions of the engine are released, and performs said restriction released operation.

Growing community of inventors

Osaka, Japan

Keiji Kunisawa