Robert Boschgmbh

David Cook

Aleksandar Kojic

Jasim Ahmed

Nikhil Ravi

Nalin Chaturvedi

Jean-Pierre Hathout

Sungbae Park

Joel Oudart

Maksim Subbotin

Christopher Mayhew

Karl Lukas Knierim

Joël Oudart

Eric M Doran

Dave Andre

Hanho Song

Han Ho Song

In one embodiment an engine system includes a cylinder, an inlet valve configured to control the flow of gases into the cylinder, an outlet valve configured to control the flow of gases out of the cylinder, a throttle configured to control the flow of fuel into the cylinder, a memory including program instructions stored therein, and a processor operably connected to the inlet valve, the outlet valve, the throttle, and the memory, and configured to execute the program instructions to control the inlet valve and the outlet valve in accordance with an HCCI valve lift profile and an SI valve open/close profile, and activate a first spark in the cylinder while controlling the inlet valve and the outlet valve in accordance with the HCCI valve lift profile and the SI valve open/close profile.

System and method for control of a transition between SI and HCCI combustion modes

A combustion engine system in one embodiment includes a combustion engine, at least one controllable component operably connected to the combustion engine, at least one sensor configured to sense a parameter associated with the combustion engine, and an electronic control unit (ECU) operably connected to the at least one controllable component and the at least one sensor, wherein the ECU is configured to determine a temperature of an unburned mixture based upon the sensed parameter, and control the at least one controllable component based upon the determined temperature.

Method of estimating duration of auto-ignition phase in a spark-assisted compression ignition operation

In one embodiment a method of controlling an engine system includes providing a first cylinder with a first inlet valve, a first outlet valve, and a first throttle, controlling the first inlet and the first outlet valve in accordance with an SI valve lift profile, activating a first spark in the first cylinder while controlling the first inlet and the first outlet valve in accordance with the SI valve lift profile, controlling the first inlet and the first outlet valve in accordance with an HCCI valve lift profile, activating a second spark in the first cylinder while controlling the first inlet and the first outlet valve in accordance with the HCCI valve lift profile, and controlling the SOI timing of the first throttle in an HCCI SOI mode while controlling the first inlet valve and the first outlet valve in the HCCI valve lift profile after activating the second spark.

A method of operating an internal combustion engine includes moving an exhaust valve to a first open position to enable an exhaust product to flow through an exhaust port of the internal combustion engine. The method also includes maintaining the exhaust valve at the first open position for a predetermined time period. The method also includes moving an intake valve to a second open position during the predetermined time period to enable an intake product to flow through an intake port of the internal combustion engine. Additionally, the method includes preventing at least a portion of the intake product from flowing through the exhaust port during the predetermined time period with a first blocking member and a second blocking member.

Device and method configured to control valve operation in a piston engine

Engine correction inputs to control oscillation in an engine output in a transition between 2-stroke and 4-stroke engine cycle modes of an HCCI engine are determined as follows: for each mode, valve timings which modify the engine output the most upon switching are determined, and a linear engine system model is defined at least partially based on the determined valve timings, which model provides mappings relating initial conditions of the engine and the engine correction inputs to outputs of the engine; initial conditions of the engine corresponding to a switching point for switching between the two modes are determined; desired engine output conditions upon switching between the two modes are specified; and the engine correction inputs are determined by using the determined initial conditions, the desired engine output conditions, and the linear engine system model corresponding to the engine cycle mode in effect upon switching.

Control architecture and optimal strategy for switching between 2-stroke and 4-stroke modes of HCCI operation

A method and system of controlling auto-ignition timing in an internal combustion engine cylinder in which the timing of auto-ignition in prechambers that are coupled to the cylinder is precisely controlled. The auto-ignition in the prechambers produces hot gas jets that are introduced into the charge space of the cylinder and rapidly induce a second auto-ignition of the mixture in the cylinder. By precisely controlling the timing of the auto-ignitions within the prechambers, the timing of the auto-ignition within the cylinders can, in turn, be precisely controlled.

Control of auto-ignition timing for homogeneous combustion jet ignition engines

A method and system of controlling auto-ignition timing in an internal combustion engine cylinder in which the timing of auto-ignition in prechambers that are coupled to the cylinder is precisely controlled. The auto-ignition in the prechambers is produced by a compression stroke using pistons situated within the prechambers. Hot gas jets produced by the prechamber auto-ignitions are introduced into the charge space of the cylinder and rapidly induce a second auto-ignition of the mixture in the cylinder. By precisely controlling the timing of the auto-ignitions within the prechambers, the timing of the auto-ignition within the cylinders can, in turn, be precisely controlled.

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Mountain View, CA, United States of America

David Cook