Patent ID: 9624820
Date: 2017-04-18
CPC Classifications: F02B,F02D,F02F,F02P,F05C,Y02T

Claim:
1. A control device for a direct injection gasoline engine comprising: an engine body having a cylinder; and an injector for injecting fuel including at least gasoline into the cylinder and being configured so that the larger a lift amount of the injector is, the larger a fuel injection opening area of the injector becomes; the control device comprising: a fuel injection control part executed on a microprocessor and configured to control the injector to inject fuel multiple times from a compression stroke to an expansion stroke to set an injection interval and lift amount of the injector, wherein the fuel injection control part determines if an engine load is at or above a predetermined first engine load threshold or lower than a predetermined second engine load threshold that is higher than the first engine load threshold; wherein when the engine load is lower than the predetermined first engine load threshold, the fuel injection control part controls the injector to inject fuel in a first injection mode at a predetermined narrow injection interval and a predetermined low lift amount; and wherein when the engine load is at or above the predetermined second engine load threshold, the fuel injection control part controls the injector to inject fuel in a second injection mode at a predetermined wide injection interval, which is wider than the narrow injection interval of the first injection mode, at a predetermined high lift amount, which is higher than the low lift amount.