Loading patent…
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsKazuhiro Ichimoto, Katsuhiko Miyamoto, Shogo Omori, Hitoshi Kamura, Atsuyoshi Kojima
Estimating the term…
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.
A lean-burn internal combustion engine including an engine body having an air intake system and adapted for a lean combustion operation, an intake air amount control mechanism provided in the air intake system for adjusting an amount of intake air supplied to the engine body, a vacuum actuator operable with use of a vacuum taken out of the air intake system downstream of the intake air amount control mechanism, and combustion control means for operating the engine body to effect the lean combustion in accordance with an operating state of the engine body, comprising:
Dependencies are inferred from the claim text.