Inverter Coolant Tempurature question???

My engine coolant runs at 194f when speed is around 60 with AC off and outside temps are moderate, your reading look normal to me.I have an UltraGauge which allows you to set alarms on the limited variables I can see, I wish I had spent the extra money and bought a Scan gauge.

 

What I remember from reading ICT is that it typically ran about 20F above ambient.

 

I think ambient is correct. Your engine compartment my not be the same as the outside temperature if you are grill blocking.

 

Ambient: existing or present on all sides : encompassing

The dictionary is a wonderful thing.

 

Hi kknguyen1168

Below is a chart of the evolution of several temperatures in a 9.7Km (6.2miles) urban trip at 40ºC (104ºF) ambient temperature. In this trip my car reached the max inv coolant temp I have recorded.

The inverter coolant temperature (black line) is almost stable at 54ºC (129ºF) while MG1 and MG2 rises since the beginning of the trip all the way till the end, reaching 79ºC (174ºF).

MG1 inverter and boost inverter temperatures show sudden oscillations of +10C and up to +30C (boost inv) coming back to the baseline temperature (55ºC=131ºF) after some 200m (0.12miles)



I hope you like it

Big hugs from Frank

 

Since you consider heavy duty towing, MG1+MG2 temps are your priorities. Engine oil is too, but no sensor IIRC.

 

Just wondering engine oil temp must be close to ICE coolant they are in the same block ... maybe not.

 

In most engines oil is not cooled by coolant and can be much hotter under heavy duty service (up to 300F). This is why thicker oils are recommended for heavy duty service. I'm afraid 0W20 will not be good enough.

 

My ICT varies enormously depending on outside temperature. Sounds normal to me.

 

MG1 and MG2 is in the same housing swimming in the same "oil" so measuring both temp is not necessary I bet they are the same or within the error rate..

As to what is the max or the worry temp not sure.

 

In the Transaxle housing.

 

1. That is not unusual. Typically you will see the inverter running about 10 - 15 degrees Farenheit above Ambient Temperature (e.g. the outside temperature displayed in your car on your Heating/AC display). If you are in slower traffic (slow and go traffic or city driving) it will increase to about 20 degrees Farenheit. For example, if you were driving on the Freeway and your the outside air temperature is 85F, you can expect your inverter to be running around 95F - 100F. Now you exit the freeway and do some surface street driving. You can expect your inverter temperature to increase to 100 - 105F.

2. That seems perfectly normal. My range is 190F in the cooler winter months (50F) and 195 - 198 in the hotter summer months (90F).

3. Your choice. I run the inverter and water temperatures because I grill block in the winter. I also run the RPM and MPH because I'm interested in knowing the RPM's and my true speed..

Hope this helps.

 

That exactly right. That what I meant both are churning in the same transaxle fluid (I called oil which it is). So no real temp difference should be expected btw MG1 and MG2.

But I have not really measured them my SGe can not do this things need one of that ODBII bluetooth thingy...