Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Hisao Mae

Hideo Kobayashi

Masaaki Takizawa

Kunimasa Yoshimura

Noboru Matsubara

Kazuo Miyauchi

Takao Kashiwagi

An apparatus for controlling the amount of alcohol and gasoline injected into an engine which uses a mixed fuel, where alcohol is the main fuel and gasoline is the auxiliary fuel. The fuel injection rates vary depending in part upon the temperature of the engine coolant, the position of a transmission's shifting device, engine RPM, engine air intake rate and oxygen sensor readings.

Fuel injection apparatus for controlling the amount of alcohol and

An engine has cylinder head and cylinder block cooling jackets. A control system controls a valve system to circulate fluid through a conduit system, the jackets and a radiator in various flow patterns. If the block jacket cooling fluid temperature is less than a warmup completion temperature, the control system establishes a combined conduit circuit including both the head and the block cooling jacket but not including the radiator, and makes a cooling fan system for the radiator blow relatively weakly. If the block jacket cooling fluid temperature is greater than the warmup completion temperature, then, if it is less than an overheating temperature higher than that, the control system establishes two substantially separate conduit circuits, one including the head cooling jacket and the radiator, and the other including the block cooling jacket but not the radiator; but, if it is greater, the control system establishes a combined conduit circuit including both the head and block cooling jacket and also the radiator. If the block jacket cooling fluid temperature is greater than a block fan trigger temperature equal to or slightly higher than the warmup completion temperature, then: if the head jacket cooling fluid temperature is less than a head fan trigger temperature less than the warmup completion temperature, the control system makes the fan system blow relatively weakly; while, if the head jacket cooling fluid temperature is greater than this head fan trigger temperature, the control system makes the fan system blow relatively strongly.

Internal combustion engine cooling system and method of operation thereof

A variable valve event engine has a plurality of cams with different cam profiles and can vary the operating characteristics of the valve by moving a rocker arm for selectively changing the cams in accordance with changes in the operating conditions of the engine. The engine further includes a spring urging member which causes a certain amount of energy to be retained in a spring for rapidly changing the cams. The engine has a detector for sensing the temperature of the lubricant utilized in a hydraulic member for moving the rocker arm so that the movement of the rocker arm is effected only when the lubricant temperature is higher than a predetermined temperature.

Variable valve event engine

Growing community of inventors

Susono, Japan

Hisao Mae