Kubota Corporation

Sharp Kabushiki Kaisha Corporation

Hiroaki Okano

Katsushi Inoue

Masanori Fujiwara

Kazuo Nishikawa

Nobuki Sakikawa

Hisaharu Yagi

Yoshihiro Shimizu

Tomonori Akai

Katsushi Morimoto

Yuki Ishii

Norihiro Matsuoka

Misaki Nakamura

Daichi Kato

Hiroaki Imahara

Emi Nishiuchi

Provided is a diesel engine capable of regenerating a DPF even during no-load and/or light-load operation. In a DPF regeneration process, opening-degree reduction control Sfor an exhaust-air throttle valve is performed after a start condition Sof the regeneration process of the DPF in which PM is deposited is satisfied. When exhaust air reaches a temperature equal to or higher than a predetermined after-injection permissible temperature TA, after-injection control is subsequently started S. Post-injection control is started Safter the exhaust air reaches a temperature equal to or higher than a predetermined post-injection permissible temperature TP by combustion of after-injection fuel. The PM deposited in the DPF is incinerated by the exhaust air increased in temperature by catalytic combustion of post-injection fuel in a valve downstream-side DOC.

Diesel engine

To reduce loss due to water evaporation and to efficiently release moisture from a moisture absorbing portion, in the humidity controller according to the present invention, a moisture absorbing portion () is formed to include at least two gel sections each with a different thermal conductivity and to release absorbed moisture from an exposed surface () that is a specific region exposed outside and that is disposed on the surface opposite to a heater () on the basis of heating by the heater ().

Humidity controller

There is provided an exhaust treatment device for a diesel engine capable of accurately estimating an amount of ash deposition. In the exhaust treatment device, an ash deposition estimation device estimates an amount of ash deposition on a DPF after ending of regenerating treatment for the DPF, based on data regarding differential pressure and exhaust flow rate stored in a memory device over a period immediately before the end of regeneration, the period ranging from the end point of regenerating treatment for the DPF to a point in time going back a predetermined duration. An electronic control device preferably makes an alarm device issue an alarm, upon arrival of an estimated value of ash deposition at a predetermined alarm request value.

Exhaust treatment device for diesel engine

An engine promoting DPF regeneration processing is provided. Catalyst activation processing and thereafter DPF regeneration processing are performed under control of a device. In the catalyst activation processing, a target temperature of exhaust at an exhaust exit of a catalyst is set to be in a first temperature region, and then the opening degree of an exhaust throttle device is controlled. In the DPF regeneration processing, the target temperature is set to be in a second temperature region. A target temperature of the exhaust at an exhaust inlet of a DPF is set to be in a third temperature region. The opening degree of the exhaust throttle device is controlled, and unburned fuel is supplied into the exhaust. The temperature regions are set to be successively higher, and a temperature difference between successive temperature regions is set to be successively lower.

Engine

In order to remove a pathogenic effect of a microorganism in a room or a work space in a short period of time, an ion diffusing apparatus, which includes an ion generator () for generating positive ions each including H(HO)and negative ions each including O(HO), where m and n are arbitrary integers, and a blower for delivering the positive ions and the negative ions, which are generated from the ion generator (), from a blowout opening, is operated to widely distribute, with a high concentration, the positive ions and the negative ions in the room.

Method for purifying inside of room

Growing community of inventors

Sakai, Japan

Hiroaki Okano