Gm Global Technolgoy Operations, Inc.

Ford Global Technolgoies, LLC

Eric B Ferch

Craig Michael Sawdon

Wajdi B Hamama

Hamid M Esfahan

Michael John Cullen

Christopher E Whitney

Jeffrey M Kaiser

Robert J Horner

Anthony E Cubr

Jon C Wasberg

Wenbo Wang

Robert Charles Simon, Jr

David S Mathews

John F Van Gilder

Mark D Carr

Jian Lin

Timothy Karnjate

Cheryl A Williams

Pahngroc Oh

James T Kurnik

Anthony L Marks

Paul F Smith

Zhong Li

Trenton W Haines

Weixin Yan

Karl T Kiebel

Dale W McKim

Michael S Emmorey

Ronald M Wozniak

Marilyn L Kindermann

Brian D Francis

John Frederick Armitage

Ryan A Bruss

Matthew David Defever

Debbie L Makowske

Stephen Alan De La Salle

Marek Jareslaw Jastrzebski

John Phillip Tonkin

Kathryn W McMillan

Eloy Martinez

Hillary L Broadus

A system and method for detecting and mitigating automatic ignition in a cylinder of an internal combustion engine. The method includes providing a first sensor for sensing and determining a crank angle of a crankshaft of the engine. A second sensor is provided for detecting a change in an engine vibration frequency caused by Auto Ignition (AI). The engine vibration signal of the second sensor is processed into a knock intensity signal. The knock intensity signal is indicative of the cylinder pressure and is acquired when the crank angle is between a first predetermined crank angle and a second predetermined crank angle. At least one characteristic of the knock intensity signal is determined and the at least one characteristic of the knock intensity signal is compared to at least one predetermined characteristic threshold. If the at least one characteristic of the knock intensity signal is determined to exceed the at least one predetermined characteristic threshold, then at least one auto ignition mitigating action is performed to mitigate the auto ignition event.

Method and system for engine auto-ignition detection and mitigation

A knock diagnostic module having a knock module that increments a sample count when a cylinder firing signal corresponding to a first cylinder is received and selectively increments a knock count based on a knock detection signal that corresponds to the cylinder firing signal of the first cylinder A knock analysis module analyzes the knock count of the first cylinder when the sample count of the first cylinder reaches a predetermined value and selectively generates an excessive knock signal when the knock count exceeds a predetermined threshold. A remedial action module selectively performs a remedial action based on the excessive knock signal.

Engine knock diagnostic

A control system includes an engine mode transition module that initiates a deactivated mode to deactivate at least one cylinder. A scheduling module schedules a command to disable a spark plug at least one engine cycle after a command to disable a fuel injector for the at least one cylinder.

Fuel management systems and methods for variable displacement engines

A knock detection system for an engine includes an intensity module, a knock threshold module, and a detection module. The intensity module determines an engine vibration intensity during a first period of engine operation. The knock threshold module determines a knock threshold based on an ethanol concentration in a fuel supplied to the engine. The detection module determines whether engine knock has occurred during the first period by comparing the knock threshold and the engine vibration intensity.

System and method for knock detection based on ethanol concentration in fuel

An engine control system includes a disturbance module, a torque correction module, a torque-to-spark module, and a spark correction module. The disturbance module determines a disturbance value for a past combustion stroke of a cylinder of an engine based on rotation of a crankshaft. The torque correction module selectively determines a torque correction for a future combustion stroke of the cylinder based on the disturbance value. The torque-to-spark module determines a spark correction based on the torque correction and determines an uncorrected spark timing based on a torque request. The spark correction module determines a corrected spark timing based on the uncorrected spark timing and the spark correction and generates spark during the future combustion stroke based on the corrected spark timing.

Cylinder combustion performance monitoring and control with coordinated torque control

A control system comprising an ignition fuse diagnostic module that determines a state of an ignition fuse associated with an ignition coil of an engine cylinder, and a fuel control module that selectively operates a fuel injector associated with the engine cylinder based on the state of the ignition fuse. A method comprising determining a state of an ignition fuse associated with an ignition coil of an engine cylinder, and selectively operating a fuel injector associated with the engine cylinder based on the state of the ignition fuse.

Ignition coil module fuse diagnostic

An engine control system includes a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor. An intensity determination module determines an engine knock intensity based on one of a maximum of and an average of the FFT. A status determination module determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft.

Diagnostic systems and methods for engine knock sensors

An engine control system includes an air control module, a spark control module, a torque control module, a transient detection module, and a launch torque module. The air control module controls a throttle valve of an engine based on a commanded predicted torque. The spark control module controls spark advance of the engine based on a commanded immediate torque. The torque control module increases the commanded predicted torque when a catalyst light-off (CLO) mode is active, and increases the commanded immediate torque when a driver actuates an accelerator input. The transient detection module generates a lean transient signal when an air per cylinder increase is detected while the CLO mode is active. The launch torque module generates a torque offset signal based on the lean transient signal. The torque control module increases the commanded immediate torque based on the torque offset signal.

Managing lean air/fuel transients in coordinated torque control

A knock detection module for an engine comprises a statistics storage module and a processing module. The statistics storage module stores M times N vibration profiles corresponding to M zones of operation of the engine and N cylinders of the engine, wherein M and N are integers greater than one. The processing module determines in which one of the M zones the engine is operating and determines whether knock has occurred for one of the N cylinders by comparing measured vibration data with a selected one of the vibration profiles corresponding to the one of the M zones and the one of the N cylinders.

Knock system with detection zones

A system and method for controlling vehicle speed include mutually exclusive closed loop controllers for vehicle speed and acceleration which control vehicle speed by requesting an appropriate wheel torque. The system and method compute, in real time, the wheel torque required to maintain steady vehicle speed or steady acceleration depending on the particular mode of operation. The active closed loop controller acts upon vehicle speed or acceleration errors to output a desired torque request.

System and method for torque based vehicle speed control

An air control method for an internal combustion engine having air assist injectors and an electronically controlled throttle maximizes airflow through the injectors while maintaining a range of authority for the electronically controlled throttle. This method maximizes the benefits of fuel atomization while maintaining a desired engine speed in the presence of disturbances.

Air control system

A computer program architecture for a motor vehicle on-board diagnostic system includes a plurality of monitor modules for monitoring vehicle systems or components and issuing a malfunction subroutine call to a diagnostic executive upon detecting a system or component malfunction. The executive includes a plurality of software objects or modules for carrying out malfunction indicator light control and fault code storage strategies. A diagnostic scheduler module implemented as a finite state machine, controls and coordinates the sequence of the test to be run by the monitor modules as well as on-demand self tests. A malfunction indicator light (MIL) control module implements four distinct light control strategies through finite machines for illuminating and extinguishing the light and for storing and erasing fault codes under predetermined conditions.

Computer program architecture for onboard vehicle diagnostic system

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Northville, MI, United States of America

Eric B Ferch