Komatsu Corporation

Hitoshi Nakanishi

Nobuki Hasegawa

Hiroshi Shimura

Satoshi Sawafuji

Sachio Obara

There is provided a retarder control device which is simple in constitution and can reliably apply braking. An engine rotational speed detector detects an engine rotational speed, gear step detection means detects a gear step of a transmission, an accelerator operation detector detects the operated state of an accelerator, and a retarder controller previously stores automatic braking amount determination data representing the relation between the engine rotational speed and the automatic braking amount of a retarder corresponding to each gear step of the transmission and controls the retarder according to the automatic braking amount of the retarder calculated from the automatic braking amount determination data based on the detected engine rotational speed and gear step of the transmission when the accelerator is judged to be off from the detected operated state of the accelerator.

Retarder controlling device and method

A front and rear wheel load distribution control unit which provides excellent driving operability of a coupled vehicle and improves durability of a driving unit. To this end, the control unit is a front and rear wheel load distribution control unit for a coupled vehicle with a front vehicle ( ) and a rear vehicle ( ) being coupled, including an inter-axle differential lock ( ) between a front axle ( ) and a rear axle ( ) for eliminating a rotational differential between the front axle ( ) and the rear axle ( ), and includes a crossing angle detecting sensor ( ) for detecting a crossing angle of the front vehicle ( ) and the rear vehicle ( ), a front axle rotation sensor ( ) for detecting rotation of the front axle ( ), a rear axle rotation sensor ( ) for detecting rotation of the rear axle ( ), and control means ( ) for operating the inter-axle differential lock ( ) in response to a crossing angle signal from the crossing angle detecting sensor ( ), a rotation signal from the front axle rotation sensor ( ), and a rotation signal from the rear axle rotation sensor ( ).

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Mooka, Japan

Hitoshi Nakanishi