Engine temperature display device for a watercraft propulsion unit and a watercraft
In engine temperature display device for a watercraft, an engine temperature data value is calculated based on a detection signal of a temperature of an engine of an outboard motor. The engine temperature data value is sent to an engine state display device installed in a watercraft by a LAN. A control portion of the engine state display device computes the engine temperature data value based on a plurality of threshold temperatures of a standard engine model stored in a nonvolatile memory, and converts the data value into a display data for indicating a temperature level among a plurality of temperature levels. The display data is displayed on a display device on the watercraft. An engine temperature data value calculating and sending device computes using a plurality of threshold values on an engine block wall temperature specific to an engine, and sends the appropriately converted engine temperature data value. The engine state display device for the watercraft propulsion unit can display an appropriate temperature level of the engine coolant temperature indicated for a model with higher engine coolant temperatures.
1. An outboard motor comprising:
an engine control unit including a memory device and a control portion; wherein
the memory device is arranged to store a plurality of threshold values for an engine temperature of a standard engine;
the control portion is arranged and programmed to receive a detection signal corresponding to a temperature of a non-standard engine that runs at a normal temperature that is a higher temperature or a lower temperature compared to a normal temperature of the standard engine, to determine an engine temperature level based on the plurality of threshold values and the detection signal, to convert the detection signal into an appropriate engine temperature data value based on the engine temperature level, and to send the appropriate engine temperature data value from the outboard motor to a display device on a watercraft;
when the normal temperature of the non-standard engine runs higher than the normal temperature of the standard engine, the control portion is programmed to convert the detection signal into the appropriate engine temperature data value by decreasing the temperature corresponding to the detection signal; and
when the normal temperature of the non-standard engine runs lower than the normal temperature of the standard engine, the control portion is programmed to convert the detection signal into the appropriate engine temperature data value by increasing the temperature corresponding to the detection signal.
2. A watercraft comprising:
the outboard motor according to claim 1 .
3. The watercraft according to claim 2 , wherein the temperature corresponds to an engine block wall temperature or an engine coolant temperature.
4. The watercraft according to claim 2 , further comprising a display device including a transmission module and a display portion, wherein the transmission module is arranged to receive the appropriate engine temperature data value from the control portion of the outboard motor.
5. The watercraft according to claim 4 , wherein the display device includes a display device control portion and a display device memory device, and the display device control portion is arranged to determine display data based on a plurality of second threshold values stored in the display device memory device, and to output the display data to the display portion.