Ford Global Technolgoies, LLC

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Jianwen James Yi

Rodney John Tabaczynski

Zhiyu Han

Wengang Dai

Allan Roy Gale

Stephen George Russ

Eric Warren Curtis

Jeffry Gerard Sczepanski

A piston for use with a direct injection, spark ignition engine includes a piston body with a top face having a piston deck and a shallow bowl. Furthermore, the shallow bowl has a maximum depth that is in the range of one to five millimeters below the piston deck.

Spark ignition engine with shallow bowl-in-piston geometry

A method and system for generating auxiliary load during start-up and warm-up of a spark ignition engine operating with a high load, cold start and spark retard and enleanment (HL-CSSRE) methodology to achieve rapid light-off. The method and system of the present invention uses existing vehicle systems ( ) to couple an auxiliary load to the engine for a predetermined period of time during engine start-up and warm-up.

Method for generating additional engine loads during start-up

A method is presented for improving performance of direct injection spark ignition internal combustion engines at high load conditions by increasing the degree of homogeneity of the air-fuel mixture during the intake stroke of the engine. The improved performance is achieved by adding a deflector designed to reduce intake air impinging upon the fuel spray and deflecting it to the intake side of the combustion chamber, thus facilitating better fuel circulation throughout the combustion chamber. This method improves engine performance at high load engine operating conditions.

Direct injection spark ignition engine

A method of detecting internal combustion engine misfires by generating a predicted Karlovitz number as a function of different engine operating conditions such as the air fuel ratio (AFR), the engine speed, the amount of exhaust gas recirculation (EGR), spark-ignition (SI) timing and the airflow rate. The predicted Karlovitz number is then compared against the threshold Karlovitz number in which misfire occurs. The threshold Karlovitz number is determined from a model for misfire predictions in engines and is stored in the electronic engine controller (EEC). A misfire is reported if the predicted Karlovitz number is greater than the threshold Karlovitz number. In another aspect of the invention, the predicted Karlovitz number is generated from submodels of laminar flame speed, laminar flame thickness, turbulence intensity, and turbulence integral length scale.

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Ann Arbor, MI, United States of America

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