there is no literal translation - urja purja janna - nitty gritties वह कार का ऊर्जा पुर्जा जनता था. Wah car ka urja purja janta tha. He knows the nitty gritties of the car.

There are lots slang being used in every language by their native speakers. ऊर्जा पुर्जा जानना is slang in Hindi. In Hindi slang most of the time there is companion word ( meaning leas in that context ) comes with word. like... खाना - वाना , गाडी- वाड़ी, in this words, there is no meaning of वाना and वाड़ी if it comes alone. Same way... In ऊर्जा पुर्जा जानना , all words have different means but when it comes together gives a different meaning.... ऊर्जा - Energy पुर्जा - Part / component जानना - to know. but here mean to ऊर्जा पुर्जा जानना is Knowing everything. Some times this slang can be said पुर्जा पुर्जा जानना ... वह मेरे बारे में पुर्जा पुर्जा जानती थी. She knows everything about me... I hope this would be helpful for you... Thanks, HindiPathak

Hello, i think that the meaning of "urja purja janna" is that you lost everything(of something)

It means "to know inside out" or similar.

उर्जा is energy/electricity. I have not heard that phrase before. Do you have the context for it?