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. 16, 2000
Filed:
Nov. 13, 1997
Seiji Okada, Kawasaki, JP;
Takashi Takahashi, Tokyo, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An auxiliary brake system includes a turbocharger, including an exhaust turbine driven by exhaust gas supplied from an internal combustion engine, nozzle vanes disposed therearound at intervals for a vane-opening-degree adjustment, and an actuator for adjusting the vane opening degree; a compression-releasing engine brake unit for generating an engine brake force by discharging suction air compressed in a combustion chamber of the engine at the timing in the vicinity of compression top dead center; and an electronic control unit. This control unit actuates the engine brake unit when the engine is in a fuel-cut region, and rotates the nozzle vanes through an actuator so that the opening degree of each nozzle vane is smaller than that attained when the engine brake unit is disabled and meets an engine rotation speed. As a result, when the engine brake unit is in operation, the rotation speed of the turbine of the turbocharger increases within a range where the turbine rotation speed does not exceed a rotation speed limit, so that the supercharging degree in the turbocharger increases, whereby an engine brake action of the engine brake unit is enhanced to produce a required engine brake force, while improving the durability of the turbocharger.