Toyota Jidosha Kabushiki Kaisha

Ryusuke Ogino

Hidenori Moriya

Hiromichi Yasuda

Masahiro Wanibe

Ryo Tadokoro

A primary opening amount setting device sets a primary throttle valve opening amount based on an accelerator-pedal operation amount determined by an accelerator operation amount determination device. An injection amount calculation device sets a fuel injection amount based on the primary throttle valve opening amount. A first index value determination device determines a first index value that indicates a state of combustion of an air-fuel mixture in a cylinder of an engine. A secondary opening amount setting device sets a secondary throttle valve opening amount, which is a final target value of an opening amount of a throttle valve, based on the first index value.

Control apparatus and control method for internal combustion engine

The internal combustion engine has a valve driving mechanism (VM) capable of changing the valve-opening characteristic of at least one of an intake valve (Vi) and an exhaust valve (Ve), an in-cylinder pressure sensor for detecting the in-cylinder pressure in a combustion chamber and ECU. ECU calculates the variation amount of the in-cylinder pressure caused by the valve-overlap of the intake valve (Vi) and the exhaust valve (Ve), and based on this variation amount of the in-cylinder pressure and the in-cylinder pressure detected at a predetermined timing in the compression stroke, calculates an amount of air sucked in the combustion chamber, as well as, based on this calculated intake air amount, determines the ignition timing. The amount of air sucked in the combustion chamber is accurately and costlessly calculated, and the ignition timing is optimally determined by using the calculated air amount.

Device and method for controlling internal combustion engine

An internal combustion engine () provided with a valve mechanism (VM) able to change a valve opening characteristic of at least one of an intake valve (Vi) and exhaust valve (Ve), a cylinder pressure sensor () for detecting a cylinder pressure in a combustion chamber (), and an ECU (), wherein the ECU () calculates the amount of air sucked into the combustion chamber () based on an intake air pressure during valve overlap between the intake valve (Vi) and the exhaust valve (Ve), the exhaust gas pressure during valve overlap, a cylinder pressure during the compression stroke detected by a cylinder sensor (), and a gas passage effective area during valve overlap.

Growing community of inventors

Shizuoka-ken, Japan

Ryusuke Ogino