Low speed pre-ignition knock detection, mitigation, and driver notification

US10823098B1 · kind B1 · utility

Assignee

• FCA US LLC. · US

Inventors

• Ethan E Bayer · Lake Orion, US
• Jonathan D Stoffer · Rochester Hills, US
• David A Lawrence · Lake Orion, US
• William P Attard · Brighton, US
• Tyler Tutton · Royal Oak, US

Key dates

• Filing date: Apr 18, 2019
• Grant date: Nov 3, 2020
• Expiry date: Apr 18, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2250/26
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A low speed pre-ignition detection, mitigation, and driver notification system and method utilize a controller to analyze a knock signal from a knock sensor to detect LSPI knock of the engine and in response to detecting the LSPI knock, enrich a fuel/air ratio of the engine and limit a torque output of the engine to a level that is less than a maximum torque output of the engine, and when enriching the fuel/air ratio of the engine and limiting the torque output of the engine does not mitigate the LSPI knock, output at least one message for a driver of the vehicle instructing the driver to take remedial action to mitigate the LSPI knock.