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. 06, 1979
Filed:
May. 24, 1977
Masaru Hibino, Okazaki, JP;
Michio Morishita, Toyota, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
An exhaust gas recirculation apparatus of the so-called exhaust gas pressure control type, including, in combination, a vacuum-operated pressure control valve adapted for controlling the pressure of the exhaust gas in the exhaust gas recirculation passageway connecting the exhaust manifold to the intake manifold, and a vacuum control valve adapted for controlling the level of the vacuum signal transmitted to the pressure control valve, for obtaining a predetermined constant pressure in the exhaust gas directed to the pressure control valve. A flow control valve is provided for controlling the amount of exhaust gas directed to the pressure control valve in accordance with the load of the engine. The flow control valve has an exhaust gas passageway with a constant flow area, and another exhaust gas passageway with a flow area that is varied in accordance with the load of the engine.