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:
Mar. 01, 1994
Filed:
Jul. 31, 1992
Applicant:
Inventors:
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
60612 ; 60600 ;
Abstract
A charging pressure control apparatus including a first duty control solenoid valve for controlling the opening degree of an exhaust bypass valve to thereby control a charging pressure during 'one-turbocharger-operation', and a second duty control solenoid valve for controlling the opening degree of a waste gate valve to thereby control a charging pressure during 'two-turbocharger-operation'. The operating conditions at high altitudes of the first duty control solenoid valve and the second duty control solenoid valve are made different from those at low altitudes so that the power characteristic of the turbocharged engine is as good at high altitudes as at low altitudes.