Patent Number: 8,869,928

Title: Construction machine

Abstract: A regeneration apparatus for executing a regeneration process to an exhaust gas purifying apparatus and an engine control device that controls a rotational speed of an engine according to an instruction value by a rotational speed instruction apparatus are provided. When a directional control valve is in a neutral position, the engine control device controls the rotational speed of the engine to an automatic idle rotational speed (Nai) by an automatic idle selection unit regardless of the instruction value. However, when it is determined that the regeneration process of the exhaust gas purifying apparatus is executed in a state of controlling the rotational speed of the engine at the automatic idle rotational speed (Nai), the engine control device increases the rotational speed of the engine to a regeneration processing rotational speed (N1) higher than the automatic idle rotational speed (Nai).

Inventors: Yoshida; Hajime (Omihachiman, JP), Ishii; Hajime (Higashiomi, JP), Noguchi; Shuuhei (Higashiomi, JP)

Assignee: Hitachi Construction Machinery Co., Ltd.

International Classification: B60W 10/06 (20060101)

Expiration Date: 2018-10-28 0:00:00