Toyota Jidosha Kabushiki Kaisha

Hiroshi Kobae

Nobutaka Takeuchi

Yukari Araki

Masanori Shibata

Hisao Nonoyama

Kazuya Nakagaki

Masaho Narita

An engine coolant amount determining apparatus includes an electric water pump that can be operated intermittently while an engine is running, and a coolant temperature detecting means for detecting the temperature of coolant at a location higher than the water pump. The engine coolant amount determining apparatus also includes determining means for determining that the amount of coolant is equal to or less than a predetermined amount when the degree of change in the coolant temperature detected by the coolant temperature detecting means when the water pump is operated intermittently is large.

Growing community of inventors

Kariya, Japan

Hiroshi Kobae