Invention Grant
- Patent Title: Spark-ignition engine control method and system
- Patent Title (中): 火花点火引擎控制方法和系统
-
Application No.: US13038156Application Date: 2011-03-01
-
Publication No.: US08851050B2Publication Date: 2014-10-07
- Inventor: Kouji Shishime , Naoya Matsuo , Mikinori Ohashi
- Applicant: Kouji Shishime , Naoya Matsuo , Mikinori Ohashi
- Applicant Address: JP Hiroshima
- Assignee: Mazda Motor Corporation
- Current Assignee: Mazda Motor Corporation
- Current Assignee Address: JP Hiroshima
- Agency: Studebaker & Brackett PC
- Priority: JP2010-081261 20100331
- Main IPC: F02P5/04
- IPC: F02P5/04 ; F02D41/40 ; F02D15/00 ; F02D35/02 ; F02D13/02 ; F02B75/12
Abstract:
When preignition is detected, and an engine speed is less than a predetermined value (Nex), an air/fuel ratio is enriched (S22), and then, when the preignition is detected even after enriching the air/fuel ratio, an effective compression ratio of an engine is reduced (S23), whereafter, when the preignition is detected even after reducing the effective compression ratio, a part of injection fuel is injected in a compression stroke (S24). On the other hand, when preignition is detected, and an engine speed is equal to or greater than the predetermined value (Nex), the air/fuel ratio is enriched (S31), and then, when the preignition is detected even after enriching the air/fuel ratio, a part of the fuel is injected in the compression stroke (S32). This makes it possible to effectively suppress the occurrence of preignition while maximally avoiding deterioration in emission performance and lowering in engine power output.
Public/Granted literature
- US20110239986A1 SPARK-IGNITION ENGINE CONTROL METHOD AND SYSTEM Public/Granted day:2011-10-06
Information query
