초록 ▼

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 (13), an inter-axle differential lock (21), at least one rotation detector of a first rotation detector (27) for d

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 (13), an inter-axle differential lock (21), at least one rotation detector of a first rotation detector (27) for detecting rotational frequency of a transmission output shaft (24), a second rotation detector (28) for detecting rotational frequency of a front output shaft (25) of the inter-axle differential, and a third rotation detector (29) for detecting rotational frequency of a rear output shaft (26) of the inter-axle differential, and a controller (20) for detecting a sign of a skid occurring to driving wheels (2, 4) 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.

대표청구항 ▼

1. An inter-axle differential apparatus including an inter-axle differential for distributing torque to front and rear driving wheels at a predetermined ratio, an inter-axle differential lock for locking said inter-axle differential, and a controller for outputting a differential lock signal to s

1. An inter-axle differential apparatus including an inter-axle differential for distributing torque to front and rear driving wheels at a predetermined ratio, an inter-axle differential lock for locking said inter-axle differential, and a controller for outputting a differential lock signal to said inter-axle differential lock and locking said inter-axle differential, said inter-axle differential apparatus comprising: at least any one of the following rotation detectors: 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 said inter-axle differential; and a third rotation detector for detecting rotational frequency of a rear output shaft of said inter-axle differential, wherein said controller detects a sign of a skid occurring to said driving wheels based on at least any one of the following: amplitude and cycle of said rotational frequency detected by at least any one of said rotation detectors; and a rate of change with time of said detected rotational frequency, and outputs the differential lock signal when finding the sign of a skid. 2. A control method of an inter-axle differential for distributing torque to front and rear driving wheels at a predetermined ratio, comprising the steps of: detecting rotational frequency of at least any one of a transmission output shaft, a front output shaft of said inter-axle differential, and a rear output shaft of said inter-axle differential; calculating shaft rotation acceleration, which is a rate of change with time, of at least one of said detected rotational frequency; determining whether or not vibration of at least one of said detected shaft rotation acceleration occurs in a predetermined cycle; comparing an amplitude of at least one of said shaft rotation acceleration and a predetermined threshold value, when it is determined that said vibration occurs in said predetermined cycle; and determining that at least one of said driving wheels skids and locking said inter-axle differential, when a state, in which said vibration is larger than said predetermined threshold value, occurs predetermined times or more in a predetermined time.