摘要:
A brake diagnosis apparatus for a self-propelled vehicle can secure the safety of the brake and the productivity of mining and quarrying and can detect widely applicable data including the history. In order to achieve this, there is provided oil temperature detecting means (23) for detecting a cooling oil temperature d immediately after the oil cools a brake; holding time calculating means, for receiving the cooling oil temperature d from the oil temperature detecting means and for calculating a holding time t thereof; and a first adding means (31a), having stored therein a first matrix A, which is sectioned in vertical and horizontal directions at every predetermined cooling oil temperature area and at every predetermined holding time area, for receiving the cooling oil temperature d from any one of the oil temperature detecting means and the holding time calculating means, for receiving the holding time t from the holding time calculating means, for adding a frequency of occurrence value An to the area of the first matrix A which includes the cooling oil temperature d and the holding time t, and for freely outputting the added value to an outer portion.
摘要:
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 (11), 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 (14), for detecting the vehicle speed V; and trigger signal oscillating means (82), for oscillating a trigger signal d per predetermined time period to. Further, there is provided calculating means (83a), 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.
摘要:
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.
摘要:
The present invention is a device for detecting abrasion of a brake for a vehicle, and is capable of accurately and surely detecting a time of abrasion. For this purpose, the device includes plates (3) engaged in an outer gear (2); discs (4), engaged in an inner gear (5); a piston (6), for bringing the plates (3) and the discs (4) into pressure contact to thereby brake a vehicle, a stroke sensor (26), for detecting an amount of displacement of the piston (6); an operation detecting device (27), for detecting an operation of a brake; and a computing unit (21), for computing amounts of abrasion of the plates (3) and the discs (4) based on detection signals from the operation detecting device (27) and the stroke sensor (26).
摘要:
A hydraulic drive system of a steerable wheel of a dump truck facilitates the attaching and detaching of a hydraulic motor and allows for a large hydraulic motor to be used. In the drive system, a wheel axle is rotatably supported within a receptacle seat supported on a yoke. The steerable wheel is rotatably mounted on the outer periphery of the receptacle seat. The steerable wheel and one end of the wheel axle are connected via a speed reducer. A motor casing 33 of a hydraulic motor is connected by bolts to the receptacle seat at an end of the seat remote from the steerable wheel so that the hydraulic motor can be attached to and detached from the receptacle seat by tightening and loosening the bolts.
摘要:
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 (4) descends after evacuation of a load. The failure diagnosis device comprises body operating means (50) for raising or lowering a vessel body, a direction switching valve (7) for receiving a command from the body operating means to lower the vessel body, and a self-diagnosis control device (11) for using state detecting means (20) 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.
摘要:
A full hydraulic type steering control system is provided with a steering control valve for outputting a flow of a pressurized discharge fluid of a hydraulic pump in proportion to an amount of steering at a steering wheel, and a directional control valve for delivering the pressurized discharge fluid of the hydraulic pump into a steering control cylinder, with the output flow of pressurized fluid of the steering control valve being switched as a pilot fluid pressure. The directional control valve comprises a spool adapted to be slidably inserted in a spool bore of a valve body. The spool has a neutral position and is adapted to be displaceable from the neutral position towards a first position for delivering the pressurized discharge fluid of the hydraulic pump into a first fluid chamber of the steering control cylinder while permitting a pressurized fluid in a second fluid chamber thereof to flow out into a reservoir and towards a second position for delivering the pressurized discharge fluid of the hydraulic pump into the second fluid chamber of the steering control cylinder while permitting a pressurized fluid in the first fluid chamber thereof to flow out into the reservoir.
摘要:
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.
摘要:
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.
摘要:
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.