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:
Oct. 25, 1988
Filed:
Nov. 26, 1986
David T Szczupak, Huddersfield, GB;
Holset Engineering Company Limited, Turnbridge, GB;
Abstract
A turbocharger is provided with a system for varying the effective area of the turbine, as a predetermined function of engine rpm. The function comprises a maximum area first portion (I) at high rpms, a second minimum area portion (II) at lower rpms and an intermediate third portion (III). The third portion has a characteristic that the effective turbine area increases as a direct function of engine rpm preestablished to optimize selected operating parameters. A feedback device generates a signal representing the actual effective area and supplies it to a controller. The controller is responsive to the feedback signal to generate pressure pulses applied to a pressure responsive turbine area actuator for varying the effective area of the turbine.