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:
May. 26, 1998
Filed:
Mar. 28, 1996
Paul Douglas Free, Columbus, IN (US);
Spencer C Lewis, Jr, Columbus, IN (US);
Canden R Nelson, North Vernon, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
A turbocharger wastegate control system is responsive to electrical control signals to control the position of a wastegate valve positioned within an exhaust bypass conduit of the turbocharger. In one embodiment, the control system includes an air pressure control device having an inlet port receiving boost air pressure from an intake manifold connected to the turbocharger, an outlet port providing wastegate air pressure to a wastegate actuator and a vent to atmosphere. A number of air flow control switches are responsive to electrical control signals to control the levels of boost air pressure and vented air to thereby provide a plurality of discrete wastegate air pressure levels to the wastegate actuator. In another embodiment, the control system includes an electrically controllable wastegate actuator responsive to boost air pressure and electrical control signals to modulate the position of the wastegate actuator plunger.