INTERNAL COMBUSTION ENGINE - TOYOTA MOTOR CO LTD

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:

Click for automatic bibliography generation Help

Assignee:

TOYOTA MOTOR CO LTD (JP)
IRISAWA YASUYUKI (JP)

International Classes:

F02B37/007; F02B37/00; 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:

JP2002332887A	2002-11-22
JP2001182563A	2001-07-06

Other References: