Kyosan Denki Co., Ltd.

Denso Corporation

Nippondenso Co., Ltd.

Kyosan Denki Kabushiki Kaisha

Katsumi Arai

Kiyotoshi Oi

Kazuji Minagawa

Masaaki Konishi

Tadao Endoh

A fuel pressure adjusting apparatus which includes a casing which includes a fuel introduction port, and a fuel discharge port; and a cylindrical member which is housed in the casing, and which includes a valve seat at an end portion thereof, and a communication passage therein, the communication passage connecting the fuel introduction port to the fuel discharge port; a valve element which is provided on a fuel discharge port-side of the valve element in the casing, and which closes the communication passage when the valve element is seated on the valve seat; and a leaf spring which is provided at the fuel discharge port, and which applies force to the valve element in a direction toward the valve seat. The leaf spring includes a concave portion which supports the valve element, and which is formed such that there is a gap between the concave portion and the valve element.

Fuel pressure adjusting apparatus

A fuel pump is driven by a variable, constant current, control circuit. A pressure control valve disposed between the fuel pump and a fuel rail includes a downstream pressure control valve and a bypass valve bypassing the downstream pressure control valve. The downstream pressure control valve sets the fuel pressure in the fuel rail to a predetermined value by opening or closing a passage from a fuel pipe to the fuel rail. If the fuel pump discharge pressure is sufficiently increased, the bypass valve is opened when the upstream fuel pressure is larger than the downstream fuel pressure by at least a predetermined differential pressure. In this way, fuel is supplied to raise the fuel rail fuel pressure. Therefore, it is possible during other times to reduce the consumed electric power of the fuel pump and thus prolong its life.

Fuel supply apparatus for an internal combustion engine

An evaporative emission control system provided with a vapor-liquid separation chamber in which a liquefaction accelerating agent is filled for forcibly liquefying and separating the high boiling ingredient contained in evaporative emission and vaporizing the liquid fuel effectively when the evaporative emission is purged, thereby lightening the burden imposed on the adsorbents and preventing the deterioration of the adsorbents so as to make the canister small while keeping the adsorbent properties. It comprises a vapor-liquid separation chamber formed in the canister, a liquefaction accelerating agent which is fibrous or long strip-shaped and filled in the upper portion of the vapor-liquid separation chamber, a fuel storage chamber disposed at the lower portion of the vapor-liquid separation chamber for storing the separated liquid fuel and an adsorbent accommodating chamber which communicates with the vapor-liquid separation chamber.

Evaporative emission control system

A throttle valve control system of engine having an ultrasonic motor for driving a throttle valve fixed to a rotary shaft and positioned in a throttle body forming a suction passage. The throttle valve control system comprises a stator mounted on one side of the throttle body and provided with an elastic member having a plurality of piezoelectric elements and a travelling wave generator surface respectively disposed on the elastic member, and a rotor positioned at the outside of the stator and fixed to an extension of the rotary shaft whereby said rotor being rotatable by receiving the travelling wave generated by the travelling wave generator surface.

Growing community of inventors

Tatebayashi, Japan

Katsumi Arai