Honda Giken Kogyo Kabushiki Kaisha

Yasuyuki Komatsu

Hiroshi Sono

Takashi Moriya

Takashi Sugai

Minoru Nakamura

Kouichi Ikoma

Harumi Hatano

A valve operating system in an internal combustion engine which provides a stable seating force for an engine valve and includes an armature operatively connected to a stem of the engine valve that is capable of being seated on a valve seat member provided to a cylinder head, valve-opening and valve-closing electromagnets for exhibiting electromagnetic forces for attracting the armature to open and close the engine valve, respectively, and valve-opening and valve-closing resilient means for exhibiting resilient forces for biasing the engine valve in opening and closing directions, respectively, and for retaining the armature in a predetermined neutral position by cooperation with each other during deenergization of both the valve-opening and valve-closing electromagnets. When the engine valve V is closed by energizing the valve-closing electromagnet and is seated on the valve seat member, only the resilient force of the valve-closing resilient means is applied to the engine valve V because the valve-closing electromagnet attracts the armature and compresses the valve-opening resilient means.

Valve operating system in internal combustion engine

An electromagnetic driving device includes an armature, a pair of electromagnets disposed in an opposed relation to each other on opposite sides of the armature so as to be able to apply an electromagnetic attracting force to the armature, and a pair of return springs for biasing the armature toward the electromagnets, respectively. In the electromagnetic driving device, the energizing quantity for the electromagnets is varied in accordance with operational conditions. Thus, it is possible to insure the attracting and maintaining of the armature to and on the electromagnets irrespective of changes in operational conditions. In addition, the energizing quantity for the electromagnets is varied in accordance with the distance between the armature and the electromagnets. Thus, it is possible to avoid a wasteful consumption of electric power in the electromagnets to enable a reliable attracting and maintaining of the armature.

Energization control method, and electromagnetic control system in

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Saitama, Japan

Yasuyuki Komatsu