Browse Prior Art Database

ENGINE CONTROL SYSTEM WITH INTEGRATED COMBUSTION CONTROL

IP.com Disclosure Number: IPCOM000005948D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-19
Document File: 1 page(s) / 59K

Publishing Venue

Motorola

Related People

Robert W. Deutsch: AUTHOR

Abstract

The use of optical combustion sensing in internal combustion engines has so far been partially limited by the dif- ficulty in getting optical signals from the engine to a location where they can be converted to electrical signals and processed.

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MOTOROLA Technical Developments Volume 11 October 1990

ENGINE CONTROL SYSTEM WITH INTEGRATED COMBUSTION CONTROL

by Robert W. Deutsch

   The use of optical combustion sensing in internal combustion engines has so far been partially limited by the dif- ficulty in getting optical signals from the engine to a location where they can be converted to electrical signals and processed.

   The system defined subsequently allows the engine manufacturer to build into the engine a means by which optical signals can easily be transmitted to an electronic control unit for further processing and control. This eliminates com- plicated optical couplers and allows optical control without the use of fiber optic cable.

   The engine manufacturer would build into the block of the engine optically conductive tunnels (3) from each cylinder to a central location (6). The tunnels could be constructed by injecting a molten, optically transparent material (such as glass), capable of withstanding the high combustion temperatures, into small passages in the engine head. After solidification, both ends of the tunnel would be polished to remove irregularities. The infra-red spectrum could be used to densitize the optical path to deposition of combustion byproducts.

   An electronic engine control system (10) would be wnstruded having an optically conductive window (4) in its housing and an optical sensor assembly (5) having an optical detector (6) for each cylinder. The outputs of the sensors could be ele...