Nippondenso Co., Ltd.

Denso Corporation

Nippon Soken, Inc.

Satoshi Koike

Teiyuu Kimura

Hiroshi Ando

Kazumasa Kurokawa

Naoyuki Kawazoe

Sadahisa Onimaru

Katsuyoshi Nishii

Masaomi Inoue

Toru Mizuno

Kenichiro Takada

Toshiki Saburi

Naoyuki Kamiya

Yasuhiro Mizutani

Takekazu Terui

Tomoyuki Kanda

Yoshiaki Fukatsu

Masakazu Yamada

Hiroyuki Tarumi

Hideki Yukumoto

Masahiro Shiozawa

Tetsuya Kato

Tukasa Goto

Masayuki Goto

Emiko Isogai

Hiroyuki Tatebayashi

Shunichi Ogawa

Masahiro Higuchi

Sinzi Nanba

Hideki Morishima

A basic cylinder-charged air quantity is determined by a first-order delay processing of an intake air quantity per rotation. Next, an estimated value of a change portion of the cylinder-charged air quantity caused by a change in intake valve timing is computed on the basis of engine speed, throttle opening angle, displacement angle of the intake valve timing. Then, the estimated value of the change portion of the cylinder-charged air quantity is processed second-time by the first-order delay. A difference between the estimated value of a change portion of the cylinder-charged air quantity and a value obtained by processing the estimated value second-time by the first-order delay is added as a delay correction to the basic cylinder-charged air quantity, thereby obtaining an actual cylinder-charged air quantity with a change in the intake valve timing.

Engine control apparatus and method having cylinder-charged air quantity correction by intake/exhaust valve operation

Method for producing a of a transparent type hologram screen of an wide visible range. A photosensitive member and a light source of a reference light are arranged on the same side of the light diffusing body. A light source of an object light is arranged on the opposite side of the light diffusing body, so that the light is transmitted through the light diffusing body to generate a object light. A light from a light source of a reference light is reflected at the light diffusing body or a member such as a half mirror or a transparent, reflective hologram element arranged at a front side of the light diffusing body.

Method for producing transparent type hologram

A method of producing a holographic optical element which is capable of imparting complex corrections to the holographic optical element and of effecting the exposure using a short optical path permitting little disturbance to be infiltrated. A correction holographic optical element 13 for correcting the characteristics of the holographic optical element is disposed in at least one of the optical paths of an object beam 35 and a reference beam 36 that fall on a photosensitive material 11. The object beam 35 may be one obtained by reflecting the reference beam 36 by a reflection-type holographic optical element such as a reflection-type master holographic optical element 12. In the case of a holographic optical element used for the head-up display, the correction holographic optical element 13 may be given characteristics for correcting the curvature of the windshield or characteristics for correcting color aberration.

Method of producing holographic optical element and device therefor

Image display unit

A hologram forming system for forming holograms on multiple exposures is provided. In this system, a holographic recording medium is exposed to light beams at least twice at incident angles different between exposures. The incident angle during each exposure process is determined in a given relation to the thickness of the holographic recording medium which tends to vary as the exposure process is repeated so that the reconstruction wavelengths match with target values without shifting between image colors during reconstruction of the hologram.

Multi-exposure system for hologram

Disclosed is a method for producing an optical member having excellent optical characteristics. An optical member is composed of a support plate and an optical sheet stuck on said plate via an optical adhesive. The optical adhesive is made sticky after it is coated, including ultraviolet-curing adhesives, epoxy adhesives and their mixtures. To produce the optical member, the optical sheet is formed on the surface of a fixed substrate via a transfer film. The optical adhesive is coated onto the optical sheet, the adhesive is made sticky on the sheet, the fixed substrate is peeled off, the sheet is stuck onto the support plate using the adhesive, and the adhesive is cured.

Method for producing optical member

An oxygen-sensor abnormality detecting device for detecting abnormalities in an Oz sensor for air-fuel ratio detection in an internal combustion engine. In exhaust passage 9, a converter 10 is installed which contains a three-way catalyst for removing three harmful components HC, CO, and NOx of automotive emission. In the catalytic converter 10, a catalyst temperature sensor 11 is installed which detects catalyst temperature of the converter. O.sub.2 sensors 12 and 13 are provided along the exhaust passage on the upstream side and the downstream side of the catalytic converter 10. For the O.sub.2 sensors 12 and 13, the heaters 12a and 13a are provided for promoting the activity of the O.sub.2 sensors 12 and 13. Control circuit 15 checks the catalyst temperature and compares output voltages of the Oz sensors with reference levels under an inactive temperature state of the catalytic converter. The control circuit detects abnormalities in the downstream sensor by comparing results of the comparison of the sensor output voltages.

Oxygen-sensor abnormality detecting device for internal combustion engine

A display source emits light. A first hologram receives the light from the display source and diffracts the received light. The light from the display source is applied to the first hologram at an incident angle A1 and moves from the first hologram at an outgoing angle B1. A second hologram receives the light from the first hologram and diffractively reflects the received light. The light diffractively reflected by the second hologram forms an image of the display source in viewer's field of view. The light from the first hologram is applied to the second hologram at an incident angle A2 and moves from the second hologram at an outgoing angle B2. The first and second holograms are nonparallel to remove a ghost image of the display source which would result from at least one of surface reflections at the first and second holograms. The first hologram has an angle .theta. relative to the second hologram. The angles A1, B1, A2, B2, and .theta. are in a fixed relationship to remove chromatic aberration which would result from the nonparallel arrangement of the first and second holograms.

Holographic display system

Growing community of inventors

Kariya, Japan

Satoshi Koike