Patent Application
20140034420
The present disclosure relates to a lubrication system for a machine, and more specifically to a system for controlling the lubrication system.
Conventional lubrication systems associated with a machine work on a timer basis and provide grease to bearings present in the machine at pre-determined intervals of time. For example, U.S. Pat. No. 5,823,295 relates a control system including a lubricant distribution system, a charging system adapted to drive the lubricant distribution system, a sensor for determining the operating state of the charging system, and a device for calculating a time interval being dependent upon a previous lubricating event. The control system also includes a device for producing a lubrication signal in response to the time interval reaching a predetermined interval constant.
In one aspect of the present disclosure, a system is provided. The system includes a lubrication feeder and a controller. The controller is in communication with the lubrication feeder. The controller is configured to activate the lubrication feeder according to a position of an implement and a temperature associated with the machine.
In another aspect, a method for lubricating a machine is provided. The method receives a position signal indicative of a position of an implement of the machine. The method also receives a temperature signal indicative of a temperature associated with the machine. Further, the method activates a lubrication feeder of the machine according to the received position signal and the temperature signal.
Other features and aspects of this disclosure will be apparent from the following description and the accompanying drawings.
Referring to
The paving machine 102 may also include an implement 110 such as a screed. The implement 110 may be attached to the tractor 104 by one or more tow arms 112. The implement 110 may be towed behind the tractor 104 to spread and compact paving material into a mat 114 on a paving surface 116. As shown in
Further, the machine 100 may include a lubrication feeder 120. The lubrication feeder 120 may be configured to provide lubrication to various bearings and linkage joints present in the machine 100. For example, the lubrication feeder 120 may include automatic components and manual components for the distribution of a lubricant to various parts of the machine 100. In one case, the lubricant may be pumped from a centrally located lubrication tank (not shown in the figures) to injector banks and grease reels located within the machine 100. Additionally, one or more pumps may be provided to pump the lubricant from the lubrication tank. The pumps may be pneumatically powered, hydraulically powered, or electrically powered, and connected to either an air system, a hydraulic system, or an electrical system on the machine 100 via respective supply lines. It should be noted that the lubrication feeder 120 may include additional components not described herein. Also, the connections described above are merely exemplary. The lubrication feeder 120 may be connected to other components in the machine 100 without any limitation.
Additionally, the lubrication feeder 120 may have different operation modes. For example, the lubrication feeder 120 may be in an active state or an inactive state. When in the active state, the lubrication feeder 120 is on, thereby facilitating either automatic or manual disposal of the lubricant, as the case may be. Alternatively, the lubrication feeder 120 may be in the inactive state. The present disclosure relates to a controller 122 communicably coupled to the lubrication feeder 120 such that the controller 122 is configured to optimize lubrication of the various parts of the machine 100. The controller 122 may activate the lubrication feeder 120 according to the position of the implement 110 and a temperature associated with the machine 100.
Referring to
In another embodiment, the controller 122 may receive signals from any other control module present in the machine 100, indicating the position of the implement 110. For example, in case of the asphalt paver, the controller 122 may receive a signal indicating that the asphalt paver is in the “PAVE” mode. This signal may be indicative that the implement 110 of the asphalt paver is in the working position. A person of ordinary skill in the art will appreciate that various other methods known in the art may be utilized to determine the position of the implement 110 of the machine 100. The embodiments described herein are merely on an exemplary basis and do not limit the scope of the disclosure.
Moreover, the activation of the lubrication feeder 120 may also be based on the temperature associated with the machine 100. The temperature associated with the machine 100 may include at least one of a lubrication tank temperature, a coolant temperature, and an exhaust manifold temperature of the machine 100. As shown in
Moreover, the temperature associated with the machine 100 may be determined based on the type of the machine 100. For example, the temperature the lubrication tank temperature may be considered in case of the asphalt paver. Additionally, when the temperature associated with the machine 100 exceeds a pre-determined threshold, the controller 122 may activate the lubrication feeder 120. For example, when the machine 100 is the asphalt paver, the controller 122 may activate the lubrication feeder 120 when the lubrication tank temperature exceeds the pre-determined temperature of about 35° C.
One of ordinary skill in the art will appreciate that the connections shown in accompanied figures are on an exemplary basis. The controller 122 may additionally be coupled to other sensors or components of the machine 100 not shown herein. Also, it should be noted that the position of the implement 110 and/or the temperature associated with the machine 100 may also be indirectly determined or computed based on one or more measured signals.
In one embodiment, the controller 122 may additionally receive signals indicative of the operation mode of the lubrication feeder 120. For example, the controller 122 may activate the lubrication feeder 120 when the lubrication feeder 120 is in the active state, either in the manual or the automatic mode. In another embodiment, the controller 122 may activate the lubrication feeder 120 according to an operator command. The operator command may include any suitable visual or auditory input such as pressing of a switch or button in the operator station 105, providing a speech command, to name a few. It should be noted that based on the operator command the activation of the lubrication feeder 120 according to the position of the implement 110 and the temperature associated with the machine 100 may be overridden.
Further, the controller 122 may activate the lubrication feeder 120 based on the one or more received signals. In one embodiment, the controller 122 may issue control signals to activate the lubrication feeder 120 when the implement 110 is in the working position and the temperature associated with the machine 100 exceeds the pre-determined threshold.
In another embodiment, the controller 122 may be configured to de-activate the lubrication feeder 120. The controller 122 may de-activate the lubrication feeder 120 when the implement 110 is in the idle position and/or the temperature associated with the machine 100 does not exceed the pre-determined threshold. Also, the controller 122 may de-activate the lubrication feeder 120 when the power source of the machine 100 is shutdown.
The controller 122 may embody a single microprocessor or multiple microprocessors that include a means for receiving input from the sensors and providing output to the lubrication feeder 120 of the machine 100. Numerous commercially available microprocessors may be configured to perform the functions of the controller 122. It should be appreciated that the controller 122 may readily embody a general machine microprocessor capable of controlling numerous machine functions. A person of ordinary skill in the art will appreciate that the controller 122 may additionally include other components and may also perform other functionality not described herein.
The method for lubricating the machine 100 will be described in the detail in connection with
Critical areas such as the bearings and the linkage joints of the machine 100 need to be lubricated in order to prevent failure. These components of the machine 100 are typically lubricated during operation of the machine 100 to eliminate the need for stopping the machine 100 for lubrication. Currently used autolube systems present within the machine 100 function on a timer basis. The autolube systems provide lubrication to the bearings at pre-determined time intervals. Hence, in the currently used autolube systems, lubrication may take place even when the bearings are not in use. This may result in over lubrication of the bearings and/or wastage of the lubricant. The over lubrication of the bearings may lead to bearing failure in situations where the bearings are not warmed up to a temperature at which the lubricant may be taken by that specific bearing.
In the present disclosure, as described above, the controller 122 may activate the lubrication feeder 120 at an optimum time. The controller 122 may activate the lubrication feeder 120 according to the position of the implement 110 and the temperature associated with the machine 100. One of ordinary skill in the art will appreciate that the disclosure provides lubrication to the various parts of the machine 100 when the bearings are in use, as indicated by the position of the implement 110. Further, the temperature associated with the machine 100 may be indicative of the temperature of the bearings within the machine 100. Hence, the controller 122 may activate the lubrication feeder 120 when the bearings may be warmed up to the temperature at which the lubrication may be optimal.
At step 302, the position signal indicative of the position of the implement 110 of the machine 100 may be received. The implement 110 may either be in the working position or the idle position. At step 304, the temperature signal indicative of the temperature associated with the machine 100 may be received. The temperature signal may include the signal indicative of the lubrication tank temperature, the coolant temperature and/or the exhaust manifold temperature. The controller 122 may compare the received temperature with the pre-determined threshold. Based on the comparison, the controller 122 may determine if the temperature associated with the machine 100 exceeds the pre-determined threshold.
Thereafter, at step 306, the controller 122 may activate the lubrication feeder 120 based on the received position and temperature signals. The controller 122 may activate the lubrication feeder 120 when the implement 110 is in the working position and the temperature associated with the machine 100 exceeds the pre-determined threshold. In one embodiment, the activation of the lubrication feeder 120 may additionally be based on the operator command and/or the operation mode of the lubrication feeder 120.
Further, the controller 122 may de-activate the lubrication feeder 120 when the implement 110 is in the idle position or when the temperature associated with the machine 100 may fall below the pre-determined threshold. In one embodiment, the controller 122 may de-activate the lubrication feeder 120 when the power source of the machine 100 is shutdown.
While aspects of the present disclosure have been particularly shown and described with reference to the embodiments above, it will be understood by those skilled in the art that various additional embodiments may be contemplated by the modification of the disclosed machines, systems and methods without departing from the spirit and scope of what is disclosed. Such embodiments should be understood to fall within the scope of the present disclosure as determined based upon the claims and any equivalents thereof.
