Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-06-20
1999-11-23
Lefkowitz, Edward
Communications: electrical
Condition responsive indicating system
Specific condition
307 106, 1231792, 180272, 36442434, G08B 2100
Patent
active
059908009
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to what is called a remote engine starter whereby a vehicle engine can be started from a remote location, and in particular relates to a remote engine starter suitable for construction machines.
BACKGROUND ART
Remote engine starters in which an electromagnetic wave is sent to an automobile by a transmitter, this is received by a receiver in the automobile, and the automobile engine is started by driving a self-starter motor in response to this received signal are already well known for automobiles (automatic vehicles).
Such a remote engine starter enables the engine to be started to perform warm-up operation before setting out on a busy morning without needing to go to the location of the automobile itself; this is convenient and saves time.
Wheel loaders and similar construction machines are often employed in severe natural environments such as extreme cold. There is therefore a particularly great demand in such cold regions for the ability to start the engine so that warm-up operation can be completed before going to the site of the construction machine.
However, the mode of operation and work performed by the operator in a construction machine differ from that of an ordinary automobile. Furthermore, while ordinary automobiles mainly employ gasoline engines, construction machines use diesel engines.
Consequently, if the remote engine starters that are employed in automobiles were to be applied without modification to construction machines, there would be a risk that safety might be impaired in that the working machines of construction machines should not be in motion unattended, as well as reduced reliability in that there would be no positive indication as to whether the diesel engine had actually been started or stopped.
DISCLOSURE OF THE INVENTION
With the foregoing in view, it is an object of the present invention to provide a remote engine starting and stopping device suitable for construction machines.
An object of the first aspect of the present invention is to improve safety by avoiding the risks that might occur with a construction machine if a working machine were allowed to move in an unattended condition.
This object is achieved by a remote engine starting and stopping device for a construction machine, which is capable of starting an engine incorporated in the construction machine from a remote location and stopping an operation of the engine after a prescribed time has elapsed, and which comprises: a start signal for starting the engine to the construction machine, wherein the construction machine comprises: transmission means; unmanned operation of the construction machine is satisfied; and start signal is received by the receiving means and when the safety condition detecting means detects that the safety condition for unmanned operation of the construction machine is satisfied.
Also, an object of a second aspect of the present invention is to improve the reliability of unmanned operation by performing warm-up operation for a prescribed time from the time point where the engine was actually operated.
This object is achieved in that the construction machine further comprises: operating condition; and engine has been operated after the engine starting device has been driven by the engine starting means, causes the engine to operate from the time point of the detection until a prescribed time has elapsed.
Also, an object of a third aspect of the present invention is to improve reliability of unmanned operation by outputting an alarm signal to that effect if the engine has not stopped after a prescribed time has elapsed.
This object is achieved in that the construction machine further comprises: operating condition; stopping device at a time point where a prescribed time has elapsed after driving of the engine starting device by the engine starting means; and the engine has not stopped when, after the engine stopping device has been driven by the engine stopping means, the operating condition detecting means detects that the engine is opera
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Fukano Yuji
Nakano Tasuku
Nawa Toshiaki
Ono Toyoichi
Oshima Hiroshi
Komatsu Ltd.
Lefkowitz Edward
Woods Davetta
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