Hitachi, Ltd.

Hitachi Automotive Engineering Co., Ltd.

Masahiro Kurita

Satoshi Shimada

Seiko Suzuki

Takao Sasayama

Shigeru Oho

Masahiro Komachiya

Masahiro Matsumoto

Minoru Takahashi

Masayuki Miki

Akira Koide

Shigeki Tsuchitani

Susumu Murakami

Terumi Nakazawa

Hiromichi Ebine

An in-cylinder pressure sensing apparatus for a multi-cylinder engine has a plurality of sensing parts packaged between a cylinder head and a cylinder block of an engine having a plurality of cylinders and being operative to detect a signal indicative of an internal pressure of each of the plurality of cylinders. A detection circuit is provided for connecting the sensing parts in series and for overlapping detection signals obtained from the individual sensing parts to take out a resulting overlapped signal. A reference signal generator operates to supply a reference signal for separating detection signals corresponding to the individual cylinders from the overlapped signal. A unit is also provided for separating the detection signals, detected in accordance with pressures of the individual cylinders, from the overlapped signal on the basis of the reference signal.

In-cylinder pressure sensing apparatus for multi-cylinder engine

A physical quantity detecting apparatus comprises at least one optical fiber, at least one light emitting means for emitting an incident light beam on the optical fiber, at least one light receiving means for detecting an outgoing light beam from the optical fiber, physical quantity applied position information generating means for providing information indicative of a position of a portion at which a physical quantity is applied to the optical fiber, and operation means for receiving signals from the light receiving means and physical quantities applied position information generating means and calculating a change with time in physical quantity at respective positions on the optical fiber.

Physical quantity detecting apparatus and internal combustion engine

An electrostatic type micro accelerometer comprising means for preventing permanent sticking between a movable electrode and a stationary electrode due to residual dielectric polarization, resisual electric charges and water adsorption and condensation around possible contacting portions therebetween when the movable electrode excessively displaces. The sticking preventing means is realized by disposing one of electric field reducing means, water adsorption and condensation reducing means and contacting area limiting means around the possible contacting portions.

Electrostatic type micro transducer and control system using the same

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Katsuta, Japan

Masahiro Kurita