Variable nozzle controller for turbosupercharger

Abstract

Abstract PURPOSE:To improve a degree of start-accelerating performance ever so better, by keeping up an opening area of an exhaust gas intake port in a turbine in a minimal state irrespective of an engine speed at a time when engine loads is more than the specified value and boost pressure is below the specified value the other way. CONSTITUTION:When engine load to be detected by a load sensor 31 additionally installed in an accelerator pedal 30 is below the specified value, a driving mechanism 7 is controlled by a controller 40, and adjustable vanes 4 are kept up in a normal state of maximum in opening. On the other hand, when the engine load is more than the specified value, output Pb of a boost pressure sensor 41 is compared with maximum boost pressure Pbmax, and when Pb>=Pbmax is the case, output Ne of an engine speed sensor 32 is compared with the specified values Ne1 and Ne2 (Ne1>Ne2). Here, when Ne<Ne1 is the case, these adjustable vanes 4 are controlled to be set to minimum opening, and when Ne1<=NeNe2 is the case, to be set to intermediate opening as well as when Ne>=Ne2 is the case, to be set to maximum opening, respectively. when Pb< Pbmax is the case, these adjustable vanes 4 are made to keep the minimum opening irrespective of an engine speed Ne.

Inventors

• 👤 Akio Suehiro
• 👤 末広　明夫

Bibliographic Details