The Chinese word for accelerator is
油门

yóu mén

Chinese Definition

accelerator
1. 名词. 油门
2. 名词. 加速器
3. 名词. 加速者
Components
油
1. name of an ancient river
2. oil: fat, grease, lard, etc.
麻油 - sesame oil
豬油 - lard
機油 - engine oil
炒菜要落油。 - You need to add oil when you stir-fry vegetables.
3. petroleum; fuel
石油 - petroleum; oil
漏油jau4-2 - to leak fuel
加油 - to refuel
油站 - petrol station; gas station
4. to paint
油屋 - to paint the house
5. (Cantonese) Short for 油漆, paint, tr=-
啲油jau4-2 未乾呀。 - The paint hasn't dried yet.
油油jau4-2 - to apply paint
6. (Cantonese) to colour (with crayons, coloured pencils, oil pastel, etc.)
老師將弟dai6-4弟dai6-2 油嗰幅畫貼堂。 - The teacher posted the picture that my brother coloured on the board.
7. (Cantonese) Short for 油門, accelerator; gas pedal; throttle
踩油jau4-2 - to hit the gas; to accelerate
8. (Cantonese) oily
9. to be grease-stained
10. sly; glib
11. vigorous, abundant
12. shiny
13. sweet-tempered, acquiescent
14. flippant and insincere
15. dark
16. (chiefly Taiwan originally ACG slang) resembling a weeb; obsessive towards ACG
17. (zh-used in, 浩油)
门
1. Simplified form of 門