IF method and system for power machine knock control

By dynamically deactivating and reactivating cylinders based on knock patterns, the engine controls knocking without excessive ignition retardation, enhancing fuel economy and torque output.

DE102015117148B4Active Publication Date: 2026-05-21FORD GLOBAL TECH LLC
View PDF 5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
FORD GLOBAL TECH LLC
Filing Date
2015-10-08
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Spark-ignition internal combustion engines experience knocking events, particularly with lower octane fuels, which are combated by retarding ignition timing, leading to reduced torque output and fuel economy.

Method used

Implementing fast-acting cylinder valve deactivation mechanisms to selectively deactivate cylinders with higher knock rates, adjusting the cylinder deactivation pattern based on individual cylinder knock values, and reactivating them when they cool down, allowing for advanced ignition timing.

Benefits of technology

Reduces the need for excessive ignition retardation, improving fuel economy and torque output by controlling knocking through adaptive cylinder deactivation and activation.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 00000000_0000_ABST
    Figure 00000000_0000_ABST
Patent Text Reader

Abstract

Method for a power machine (10), comprising: to deactivate individual cylinder valve mechanisms according to a cylinder pattern chosen based on a knock value of each cylinder (14) of the power engine (10), wherein the selection involves selecting a first cylinder (14) which has a knock value above a threshold for deactivation, while a second cylinder (14) with a knock value below a threshold remains active during deactivation, characterized by the fact that the first cylinder (14) remains deactivated for a number of power engine cycles, the number being based on the temperature of the first cylinder (14), the number of power engine cycles being increased if the temperature of the first cylinder (14) rises above a threshold, the temperature of the cylinder (14) including a measured or derived cylinder internal temperature.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Cylinder shut-down method for automobile IC engine has shut-down program coordinated with individual engine cylinder knock regulation

    DE10002268A1

  • Method for operating a combustion engine comprises activating extreme value monitoring when a load acquisition parameter exceeds a determined limiting value

    DE102006015662A1

  • Operating method for a spark-ignition multi-cylinder internal combustion engine with cylinder-specific fuel supply

    DE4037943C2

  • Skip fire engine control

    US8651091B2

  • Combustion engine operation with individual cylinder fuel injection - introducing temporary inhibition of supply to cylinder showing excessive antiknock ignition retardation or preignition ionisation

    DE4037943A1