Honda Giken Kogyo Kabushiki Kaisha

Siemens Electric Limited

Takeshi Gomi

Hirotomi Nemoto

Yoshio Yamamoto

Bernard J Hrytzak

Tetsuya Ishiguro

Shigekazu Tanaka

Yuichi Shimasaki

Shigemasa Kajiwara

Katsuaki Shiiki

Hidetoshi Ohishi

Hidetoshi Oishi

An actuator is connected to one of components forming a power transmitting device capable of transmitting a power provided by a valve operating cam provided on a cam shaft, so that the actuator can drive an engine valve in a lift amount which is obtained by addition of a lift amount of the engine valve based on a cam profile of the valve operating cam and a lift amount of the engine valve based on the operation of the actuator. Thus, a portion of the lift amount of the engine valve is borne by the valve operating cam, whereby a valve-opening power borne by the actuator can be reduced, as compared with a system designed so that the engine valve is driven by only the actuator only. The amount of electric power consumed by the actuator can be smaller.

Valve operating system in an internal combustion engine

An object of the present invention is to provide an exhaust circulation control valve having a simple structure and having both high-precision low-flow control characteristics and responsive large-flow control characteristics. In an exhaust circulation control valve 1, there are disposed an exhaust gas inlet port 6 for letting in exhaust gas from an exhaust gas path 2 of an engine E and an exhaust gas feed port 7 feeding the exhaust gas to an inlet path 3. Exhaust gas inlet port 6 and feed port 7 are made continuous with each other via coaxially disposed first and second openings 11, 12. First and second valve bodies 15, 16 are disposed on openings 11, 12 respectively in order to open and close the openings. First valve 15 is controlled by a drive mechanism 17 based on the operating state of engine E. Second valve 15 is kept in a closed state by a spring 19. Thus, when the lift on first valve 15 is small, exhaust gas flows only through first opening 11. When there is a large lift at valve 15, however, second valve 16 is activated as well, and the exhaust gas flows through both first and second openings 11, 12.

Exhaust circulation control valve for automotive engines

A valve operating system in an internal combustion engine is disclosed, wherein the operational characteristic of an engine valve which is an intake valve or an exhaust valve, can be changed in accordance with the operational state of the engine. In the valve operating system, a power transmitting means comprises an inner wheel, an outer wheel surrounding the inner wheel, and a carrier on which a planetary rotor is rotatably carried. The inner wheel is operatively connected to a cam shaft, and the outer wheel is connected to the engine valve. A rotational-amount control device is connected to the carrier for controlling the rotational amount of the carrier in accordance with the operational state of the engine. Thus, the size of the valve operating system can be reduced, and moreover, the operational characteristics of the engine valve can be finely changed.

Valve operating system in internal combustion engine

Improved accuracy and response of an EEGR valve (60) are obtained by novel constructional features of an upper stator member (194), a lower stator member (174), a bearing guide member (140), and a shell (64), and various inter-relationships between them for improved concentricity of parts, stable and accurate positioning of parts relative to each other, and better resistance to muddy water intrusion at an ambient air space (76) that provides for ambient air to pass through for cooling the valve. A lower stator member (174) has a through-hole (184) to which a bearing member (140) that guides a pintle shaft (114) is concentrically disposed. A frusto-conical surface (182) extends from through-hole (184) to the ambient air space (76).

Electric actuated exhaust gas recirculation valve

Improvements in a head (44) of a pintle (38) and associated valve seat (34) of an EGR valve (10) for providing a desired geometric relationship between respective tapered surfaces (36c, 104) that close against each other and for reducing tendency for carbon build-up. A blind hole (108) extends centrally axially inward from the lower end face (107) of the pintle head, reducing the mass, and hence thermal inertia, but without affecting the desired geometric relationship of the seat to the pintle head.

Pintle-type EGR valve

An improved electrical connection is provided between terminals (T) mounted in a sensor cap (26) that closes an otherwise open end of a cylindrical EEGR valve body shell (24), and terminals (98, 99) mounted in sockets (100, 102) on a solenoid coil assembly (70) that operates the EEGR valve from an engine electrical control that is connected via a wiring harness connector plug mating with an external plug of sensor cap (26) containing terminals (T). The end portions of terminals (T) that mate with terminals (98, 99) are forked blades having reduced thickness from an adjoining portion, thereby providing greater resilient flexibility for a better and more reliable electrical connection.

Electrical connection between closure cap and internal actuator of an

A circular metal clinch ring (36) secures a cap (26) to a shell (24) of an EEGR valve (20). The clinch ring has a plurality of integral sharp pointed barbs (210) that partially embed in polymeric material of the cap. The ring constrains the shell and cap against relative axial and circumferential movement, with some barbs being pointed in one sense and others in the opposite sense to resist relative circumferential movement between the cap and the shell in both circumferential senses. A wave spring washer (186) is disposed to maintain the axial position of the bobbin-mounted solenoid coil (70) within the valve.

Growing community of inventors

Saitama, Japan

Takeshi Gomi