Komatsu Corporation

Kabushiki Kaisha Komatsu Seisakusho

Yukio Sugano

Nobuki Hasegawa

Genichirou Watanabe

Shigeru Yamamoto

Hiroshi Shimura

Takao Nagai

Masaki Mori

Genichiro Watanabe

Masaru Shizume

Takanobu Murakami

Yoichi Kinosita

The gross output power of an engine distributed to at least one main machine and one auxiliary machine. A total load value calculation unit calculates the value of the lost power consumed by the auxiliary machine, and calculates the value of total load power by adding to this lost power value a target value for the main output power of the engine to be distributed to the main machine. A gross output value control unit controls the value of the gross output power so that the value of the gross output power becomes equal to the value of the total load power when the value of the total load power is less than a predetermined threshold value, and so that the value of the gross output power becomes equal to the above described threshold value when the value of the total load power is greater than the threshold value.

Engine output control device

Performance data of components of a construction machine is measured by the steps of automatically operating the component mounted to the construction machine so as to satisfy one of a plurality of measurement conditions which are preliminarily set, automatically measuring performance data of the component which is preliminarily set under the above automatically operated state, and successively performing the same steps as those defined above with respect to remaining measurement conditions other than the above-mentioned one measurement condition, thus measuring the performance data of the component with one or more than one measurement conditions.

Method and apparatus for measuring component performance data of construction machine

An inter-axle differential capable of preventing a skid to achieve stable travel is provided. For this purpose, the inter-axle differential apparatus includes an inter-axle differential ( ), an inter-axle differential lock ( ), at least one rotation detector of a first rotation detector ( ) for detecting rotational frequency of a transmission output shaft ( ), a second rotation detector ( ) for detecting rotational frequency of a front output shaft ( ) of the inter-axle differential, and a third rotation detector ( ) for detecting rotational frequency of a rear output shaft ( ) of the inter-axle differential, and a controller ( ) for detecting a sign of a skid occurring to driving wheels ( ) based on at least any one of the rotational frequency detected by the rotational detector and a rate of change with time of the detected rotational frequency and for outputting a differential lock signal to the inter-axle differential lock.

Control method of inter-axle differential and inter-axle differential apparatus

The present invention relates to a diagnosis apparatus which can plan a maintenance plan, a renewal plan, and the like of a self-propelled vehicle, by detecting a work load in addition to an engine condition. Accordingly, there is provided: engine rotating speed detecting means (,), for detecting a rotating speed N of the engine; fuel injection amount detecting means, for detecting a fuel injection amount q per rotation of the engine; loaded weight detecting means, for detecting the weight W of the loaded material; vehicle speed detecting means (,), for detecting the vehicle speed V; and trigger signal oscillating means (,), for oscillating a trigger signal d per predetermined time period t,. Further, there is provided calculating means (,), which receives each of the signals, which calculates a time period t for which both the rotating speed N having substantially the same value and the fuel injection amount q substantially the same value are maintained on the basis of the number n of the trigger signal d, which calculates an accumulative total fuel injection amount Q, and which successively calculates at least one of a fuel injection amount q1 per unit time and a conveying amount w1 per unit fuel injection amount.

Diagnosis apparatus for self-propelled vehicle

It is possible to prevent generation of failure in a dump truck and to diagnose a true cause of failure in a short period of time. Thus the present failure diagnosis method diagnoses an operation and function of at least one of respective devices, such as an engine at a predetermined engine rotational speed, a transmission, respective axles, respective suspensions, hydro-pneumatic systems, and a brake while a vessel body (,) descends after evacuation of a load. The failure diagnosis device comprises body operating means (,) for raising or lowering a vessel body, a direction switching valve (,) for receiving a command from the body operating means to lower the vessel body, and a self-diagnosis control device (,) for using state detecting means (,) to detect and store a state of at least one of the respective devices at a predetermined engine rotational speed when the body operating means is at a predetermined operative position and for comparing a magnitude of a detected value and a rate of change with reference values on the basis of hysteresis data when carrying out failure diagnosis.

Growing community of inventors

Saitama, Japan

Yukio Sugano