Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Nippondenso Co., Ltd.

Hiroshi Itou

Mamoru Kobashi

Taketoshi Minohara

Haruo Watanabe

Akio Kuramoto

Hidenori Tateno

Yoshio Takagi

Yukihiro Okane

Junichi Handa

Yasutaka Yamauchi

A production process of pigment according to this invention comprises the steps of: a first step of forming an inorganic compound coating layer on the entire surfaces of scaly substrates made of ceramic; a second step of forming metallic glossy dots on the surfaces of the inorganic compound coating layer in a scattered manner by an electroless plating, and the metallic glossy dots occupying from 0.05 to 95% of the surfaces of the inorganic compound coating layer with respect to the total surface area of the inorganic compound coating layer; and a third step of irradiating ultraviolet ray on particles formed by the second step. The impurities and the like, which adversely affect the color hue of the pigment, have been discolored or faded away by the ultraviolet ray irradiation in the third step. Accordingly, the pigment having good weather resistance can be produced readily and stably by the present invention.

Production process of pigment

An intake air control device for an internal combustion engine having a battery, an electrically operated fuel pump, a fuel injector, an intake air flow control means operative in response to the running condition of the engine, and an operating means for operating the air flow control means. The device further comprises a detecting means for detecting the voltage of the battery, and a control means for controlling the operating means for the intake air flow control means such that the amount of the intake air is decreased when the detected voltage is lower than a predetermined value.

Intake air control device for an internal combustion engine

An engine comprising a main intake passage having a throttle valve therein. A bypass passage is branched off from the main intake passage located upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a step motor, is arranged in the bypass passage. The step motor is controlled by an electronic control unit having three memories. The data, indicating the step position of the step motor, is stored in the three memories at the same time. When at least two pieces of data among the data stored in the three memories are the same, it is determined that the two pieces of data are considered as true data indicating the actual step position of the step motor.

Device for controlling the idling speed of an engine

An idling rotational speed control device wherein, when an engine ignition switch is turned off, an air flow rate control device is driven to a fully closed position or a fully opened position, and the air flow rate control valve is controlled referenced from the fully closed position or the fully opened position as the new reference position. During idling, the flow rate of air taken into an intake manifold is controlled by the intentional opening degree from the reference position of the air flow rate control valve so as to correctly perform control.

Rotational speed control device during idling of engine

Growing community of inventors

Nagoya, Japan

Hiroshi Itou