The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1984
Filed:
Feb. 11, 1982
Ernst Linder, Muhlacker, DE;
Karl-Otto Linn, Karlsruhe, DE;
Winfried Moser, Markgroningen, DE;
Klaus Muller, Tamm, DE;
Erich Zabler, Karlsruhe, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An apparatus is proposed for detecting operating characteristics of an internal combustion engine. It has an optical sensor whose output signal is delivered to an amplifier with a variable transmission behavior. As a result, it is possible to have either a stepped or a continuous adaptation of the sensor sensitivity to various operational points of the engine. It is particularly proposed that the amplification for the measurement signal be selected to be high in the case of an opto-electrical combustion chamber observation in a low load range, while it is selected to be low in a high load range, so that relatively equalized measurement results are available for use.