Lean-burn internal combustion engine

Details Lean-burn internal combustion engine Lean-burn internal combustion engine

1997-06-26

1998-10-27

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

F02B 1700

Patent

active

058265597

ABSTRACT:
A lean-burn internal combustion engine capable of stably securing a satisfactory vacuum for a vacuum actuator which uses a vacuum in an intake manifold disposed on the side downstream of an intake air amount control mechanism, while preventing a deterioration of a specific fuel consumption and a drivability of the engine. A filling state of gases in the intake manifold is controlled based on pieces of information in respect of an engine operating state and a reduction in vacuum, whereby a vacuum such as to ensure the operation of the vacuum actuator is secured. A control for inhibiting a lean-burn operation of the engine and for suppressing an EGR amount or inhibiting the EGR is made in accordance with an braking manipulation, the ON/OFF state of a vacuum switch, or an output from a vacuum sensor at the time of lean-burn operation.

REFERENCES:
patent: 5031594 (1991-07-01), Morikawa
patent: 5078107 (1992-01-01), Morikawa
patent: 5170760 (1992-12-01), Yamada et al.
patent: 5333583 (1994-08-01), Matsura

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