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Patent Searching and Data


Title:
INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2005/005811
Kind Code:
A1
Abstract:
An internal combustion engine is operated such that in an operating region where the suction air quantity is less than a predetermined value it is operated with a predetermined fixed air/fuel ratio and in an operating region where the suction air quantity is above the predetermined value, it is operated with a variable lean air/fuel ratio which increases from the fixed air/fuel ratio with increasing suction air quantity. Thus, a throttle valve (7a) whose degree of opening is controlled on the basis of a signal from a pedal stepping quantity sensor (17) is designed so that the ratio of the pedal stepping quantity to the degree of opening increases with increasing air/fuel ratio. The arrangement is such that in the operating region with variable lean air-fuel ratio, the suction air quantity is increased by a turbo charger (2). And the cooling of suction air by an intercooler (6) is controlled so that the temperature of the suction air increases with increasing air-fuel ratio, thereby enhancing atomization of fuel.

Inventors:
IRISAWA YASUYUKI (JP)
Application Number:
PCT/JP2004/009087
Publication Date:
January 20, 2005
Filing Date:
June 22, 2004
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD (JP)
IRISAWA YASUYUKI (JP)
International Classes:
F02B37/00; F02B37/007; F02D11/10; F02D23/00; F02D41/02; F02D41/04; F02D41/14; F02D41/18; F01N13/04; F02B29/04; F02D41/00; (IPC1-7): F02D41/18; F02D41/04; F02D23/00
Foreign References:
JP2002332887A2002-11-22
JP2001182563A2001-07-06
Other References:
See also references of EP 1643110A4
Attorney, Agent or Firm:
Aoki, Atsushi (Ishida & Associates Toranomon 37 Mori Bldg., 5-1, Toranomon 3-chom, Minato-ku Tokyo, JP)
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