Toyota Jidosha Kabushiki Kaisha

Nippondenso Co., Ltd.

Shigetaka Tanaka

Takashi Hayashi

Kazuhiro Sakurai

Yukio Ohtake

Yutaka Obuchi

Takashi Mori

Yukio Ohtaka

Yutaka Ohbuchi

In an airplane thrust control apparatus, a control unit (EEC) for controlling the throttle valve opening of an internal combustion engine installed in an airplane and the propeller revolution speed is provided in order to control the engine to appropriate conditions suitable to various flight conditions. During normal operation, the EEC sets the throttle valve opening and the propeller revolution speed in accordance to the stroke of a single power lever. However, if it is determined that the airplane is descending, the EEC sets the throttle valve opening to a value less than the normal set opening, and sets the propeller revolution speed to a high revolution speed equal to or higher than a predetermined revolution speed, regardless of the set revolution speed. Therefore, the thrust control apparatus is able to achieve a sufficient descending rate by reducing the engine output while maintaining high supercharger revolution speed high and maintaining required cabin pressurization.

Thrust control apparatus and method for an airplane

According to the supercharging pressure control device of the present invention, the speed of the turbocharger of an internal combustion engine for an aircraft is controlled by adjusting the opening of a waste gate valve. In the control device of the internal combustion engine, an inlet air flow rate of a turbocharger compressor, an inlet air pressure, an inlet air temperature, and an air-fuel ratio of the internal combustion engine are detected by respective corresponding sensors. Under these conditions, a pressure ratio of the compressor where the turbocharger is operated near the maximum allowable speed is calculated. At the same time, the waste gate valve opening is controlled so as to obtain the calculated pressure ratio. By this, the turbocharger is constantly operated near the maximum allowable speed. Therefore it becomes possible to operate the internal combustion engine with the maximum supercharging pressure under the operating conditions.

Supercharging pressure control device

A control system for an aircraft that controls the set speed of the propeller governor and the degree of opening of the throttle valve using a single control lever. The speed setting mechanism of the propeller governor is directly connected to the power lever by a push and pull cable, and the set speed of the propeller governor changes in proportion to the stroke of the power lever. Therefore, the propeller speed changes in proportion to the stroke of the power lever. On the other hand, the throttle valve is connected to the power lever by a nonlinear cam and a push and pull cable. Therefore, the degree of opening of the throttle valve does not change in proportion to the stroke of the power lever (i.e., the change in the degree of opening of the throttle valve has a nonlinear characteristic), and the engine output power changes in the nonlinear manner with respect to the change in the propeller speed. By setting the nonlinear characteristic in the change in the engine output power with respect to the change in the propeller speed, an optimum relationship, between the engine speed and engine output power, for the aerodynamic characteristics of the aircraft can be obtained.

Control system for non-linear control of a speed setting and a throttle

An engine including at least two digital computers wherein controlled systems each including a switching unit, an ignitor, and a spark plug are independently provided for each cylinder, and controlled systems each including a switching unit, a drive circuit, and a fuel injector are independently provided for each cylinder. The controlled systems are normally controlled by one of the digital computers, but when one of the digital computers malfunctions, the controlled systems are controlled by the other digital computer.

Device for controlling a multi-cylinder engine

An engine including a supercharger wherein a waste gate valve is provided in the bypass passage bypassing the exhaust turbine of the supercharger and the supercharged pressure is controlled by the waste gate valve so that when the opening of the throttle valve provided in the intake duct falls under a set level, the air-fuel mixture is made lean and when it becomes greater than the set opening, the air-fuel mixture is made rich. When the air-fuel mixture is changed from a lean to rich mixture, the opening of the waste gate valve is made larger to reduce the supercharged pressure and thereby prevent abrupt fluctuations in the engine output.

Growing community of inventors

Susono, Japan

Shigetaka Tanaka