Diesel Kiki Co., Ltd.

Todomu Kakishima

Yoshio Ohtani

Michio Wakiya

A vehicle fuel-efficiency warning device for use in a vehicle driven by an internal combustion engine, which device comprises elements for producing a first detecting signal when an engine speed exceeds a predetermined upper limit, elements for generating a limit signal corresponding to an upper limit characteristic of the position of a member for adjusting the amount of fuel supplied to an internal combustion engine, the upper limit characteristic including a portion having a drop-off tendency in accordance with the increase of the engine speed, elements for producing a second detecting signal when the position of the member exceeds the upper limit of the member as determined by the limit signal; and elements for issuing a warning in response to the occurrence of the first or the second or both detecting signals.

Vehicle fuel-efficiency warning device

The present invention is a plunger-type electro-magnetic actuator which produces a constant attracting force regardless of the position of the plunger. A tip portion of the plunger is tapered and a magnetic pole piece of the solenoid adapted to electro-magnetically attract the tip portion is provided with a tapered hole having a diameter larger than the outer diameter of the plunger. An additional magnetic pole piece is substantially displaced from the magnetic pole piece along the advancing direction of the plunger so as to increase the operational range of the plunger.

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Fukuoka, Japan

Todomu Kakishima