Longform — Long-form writing on the AT Protocol

NON-ROTATING CYLINDER PATTERN SELECTION FOR EQUALIZING CYLINDER USAGE IN AN INTERNAL COMBUSTION ENGINE

A system and method for operating an ICE by (a) generating a running history of one or more-cylinder events per cylinder, and (b) using the running history to select a least-used non-rotating firing p…

DRIVE·Dec 7·1 min read

F02D41/0087 Tula Technology, Inc.

MANAGING ENGINE FIRING FRACTION CHANGES DURING GEAR SHIFTS

Methods and controllers for controlling engine speed to reduce NVH that occurs in conjunction with transmission shifts are described. In some embodiments, when a transmission shift to a target gear is…

DRIVE·Jul 20·2 min read

B60W30/19 Tula Technology, Inc.

EXHAUST VALVE FAILURE DIAGNOSTICS AND MANAGEMENT

A method of operating an engine is provided. An exhaust valve actuation fault is detected for a first exhaust valve associated with a first cylinder during a first working cycle. In response to the de…

DRIVE·Jul 13·1 min read

F02D41/221 Tula Technology, Inc.

EXHAUST GAS RECIRCULATION CONTROL IN AN INTERNAL COMBUSTION ENGINE

A system and method of integrating an engine having dynamic skip fire control with an exhaust gas recirculation system in a turbocharged internal combustion engine is described. An engine control syst…

DRIVE·Nov 24·1 min read

F02D41/0052 Tula Technology, Inc.

MOTOR TORQUE SMOOTHING ON COMBUSTION ENGINES BY APPROXIMATING A PERIODIC WAVEFORM USING SINUSOIDS

Methods, systems, and devices for operating an engine controller in a vehicle for managing motor torque smoothing. One controller is configured to select a periodic disruptive waveform generated over …

DRIVE·Nov 3·1 min read

F02D41/0087 Tula Technology, Inc.

DIAGNOSTIC SYSTEM AND METHOD FOR DETECTING INTERNAL COMBUSTION ENGINE FAULTS USING EXHAUST PRESSURE READINGS

A diagnostic system and method that (a) that uses models indicative of both successful firing and skips to determine if cylinders of a skip fire controlled internal combustion engine have successfully…

DRIVE·Oct 27·1 min read

G01M15/106 Tula Technology, Inc.

CYLINDER CHARGE TRAPPING STRATEGIES BASED ON PREDICTIVE NUMBER OF SKIPS AND STAGGERED IMPLEMENTATION OF VALVETRAIN DEPENDENT OPERATIONAL STRATEGIES FOR INTERNAL COMBUSTION ENGINES

A system and method for controlling an internal combustion engine involving (1) cylinder trapping strategies where one of several pneumatic spring types are dynamically selected for cylinders based at…

DRIVE·Aug 11·1 min read

F02D41/0082 Tula Technology, Inc.

SEPARATELY DETERMINING FIRING DENSITY AND PUMPING DENSITY DURING FIRING DENSITY TRANSITIONS FOR A LEAN-BURN INTERNAL COMBUSTION ENGINE

A skip fire engine controller and method of control is described wherein during transitions from a first firing density to a second firing density, a firing density and a pumping density are separatel…

DRIVE·Aug 11·1 min read

F01N3/2033 Tula Technology, Inc.

OPTIMIZING COMBUSTION RECIPES TO IMPROVE ENGINE PERFORMANCE AND EMISSIONS FOR VARIABLE DISPLACEMENT ENGINES

A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second…

DRIVE·Jul 21·1 min read

F02D41/0087 Tula Technology, Inc.

EXHAUST VALVE FAILURE DIAGNOSTICS AND MANAGEMENT

A method of operating an engine is provided. An exhaust valve actuation fault is detected for a first exhaust valve associated with a first cylinder during a first working cycle. In response to the de…

DRIVE·Jul 14·1 min read

F02D41/221 Tula Technology, Inc.

MOTOR TORQUE SMOOTHING FOR RECHARGING EVENTS ON COMBUSTION ENGINES

Methods, systems, and devices for managing motor torque smoothing for internal combustion engine cylinder recharging events are described herein. An engine controller in a vehicle for managing motor t…

DRIVE·Jun 30·1 min read

B60W20/13 Tula Technology, Inc.

MOTOR TORQUE SMOOTHING ON COMBUSTION ENGINES BY APPROXIMATING A PERIODIC WAVEFORM USING SINUSOIDS

Methods, systems, and devices for operating an internal combustion engine at a firing fraction that is less than a value of 1.0, wherein one or more cylinders of the internal combustion engine are not…

DRIVE·Jun 30·2 min read

F02D41/0087 Tula Technology, Inc.

USE OF DIFFERENT PNEUMATIC CYLINDER SPRING TYPES IN A VARIABLE DISPLACEMENT ENGINE FOR ENGINE AND AFTERTREATMENT SYSTEM TEMPERATURE CONTROL

A system and method for a variable displacement internal combustion engine using different types of pneumatic cylinder springs on skipped working cycles to control engine and aftertreatment system tem…

DRIVE·Jun 23·1 min read

F02D41/064 Tula Technology, Inc.

FAST TORQUE RESPONSE FOR BOOSTED ENGINES

Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines. In some circumstances, turbo lag can b…

DRIVE·Apr 28·1 min read

F02D41/0007 Tula Technology, Inc.

NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM

A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engi…

DRIVE·Apr 21·1 min read

F02D41/0082 Tula Technology, Inc.

PARTICULATE FILTER SOOT MANAGEMENT FOR INTERNAL COMBUSTION ENGINES

Methods, systems, and devices for particulate filter soot management for internal combustion engines are described herein. A method for particulate filter soot management for internal combustion engin…

DRIVE·Mar 3·1 min read

F01N9/002 Tula Technology, Inc.

RECHARGING MANAGEMENT FOR SKIPPING CYLINDERS

A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed dea…

DRIVE·Mar 3·1 min read

F02D41/0087 Tula Technology, Inc.

CYLINDER CHARGE TRAPPING STRATEGIES BASED ON PREDICTIVE NUMBER OF SKIPS AND STAGGERED IMPLEMENTATION OF VALVETRAIN DEPENDENT OPERATIONAL STRATEGIES FOR INTERNAL COMBUSTION ENGINES

A system and method for controlling an internal combustion engine involving (1) cylinder trapping strategies where one of several pneumatic spring types are dynamically selected for cylinders based at…

DRIVE·Jan 20·1 min read

F02D41/0082 Tula Technology, Inc.

USING SKIP FIRE WITH POWER TAKE-OFF

Engine controllers and control schemes that facilitate skip fire engine operation in conjunction with use power take-off devices are described. In one aspect, a skip fire mode is exited when the power…

DRIVE·Jan 13·2 min read

B60K17/28 Tula Technology, Inc.

MACHINE LEARNING FOR MISFIRE DETECTION IN A DYNAMIC FIRING LEVEL MODULATION CONTROLLED ENGINE OF A VEHICLE

Using machine learning for cylinder misfire detection in a dynamic firing level modulation controlled internal combustion engine is described. In a classification embodiment, cylinder misfires are dif…

DRIVE·Jan 13·1 min read

F02D41/1405 Tula Technology, Inc.

ENGINE CYLINDER OUTPUT LEVEL MODULATION

A variety of engine controllers and methods are described for controlling engines operating in a cylinder output level modulation mode. In one aspect transitions between different effective firing fra…

DRIVE·Dec 30·1 min read

F02D41/0087 Tula Technology, Inc.

DIAGNOSTIC SYSTEM AND METHOD FOR DETECTING INTERNAL COMBUSTION ENGINE FAULTS USING EXHAUST PRESSURE READINGS

A diagnostic system and method that (a) that uses models indicative of both successful firing and skips to determine if cylinders of a skip fire controlled internal combustion engine have successfully…

DRIVE·Dec 30·1 min read

G01M15/106 Tula Technology, Inc.

EARLY DIRECT FUEL INJECTION FOR INTERNAL COMBUSTION ENGINES

A skip fire engine controller is disclosed that commands an early direct-injection of fuel during a skipped working cycle in which a cylinder is not exhausted. With early direct injection, the fuel ha…

DRIVE·Dec 30·1 min read

F02D41/402 Tula Technology, Inc.

NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM

A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engi…

DRIVE·Dec 23·1 min read

F02D41/0087 Tula Technology, Inc.

USE OF DIFFERENT PNEUMATIC CYLINDER SPRING TYPES IN A VARIABLE DISPLACEMENT ENGINE FOR ENGINE AND AFTERTREATMENT SYSTEM TEMPERATURE CONTROL

A system and method for a variable displacement internal combustion engine using different types of pneumatic cylinder springs on skipped working cycles to control engine and aftertreatment system tem…

DRIVE·Nov 25·1 min read

F02D41/064 Tula Technology, Inc.

EXHAUST GAS RECIRCULATION FLOW CONTROL FOR REDUCING EMISSIONS WITH VARIABLE DISPLACEMENT INTERNAL COMBUSTION ENGINES

Managing firing fraction transitions of a variable displacement internal combustion engines by (a) avoiding transport delays in an Exhaust Gas Recirculation (EGR) feed by starting movement of an EGR v…

DRIVE·Nov 11·1 min read

F02D41/0087 Tula Technology, Inc.

LEAN BURN INTERNAL COMBUSTION ENGINE EXHAUST GAS TEMPERATURE CONTROL

A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller inc…

DRIVE·Sep 30·1 min read

F01N3/2033 Tula Technology, Inc.

DIAGNOSTIC SYSTEM AND METHOD FOR DETECTING INTERNAL COMBUSTION ENGINE FAULTS USING EXHAUST PRESSURE READINGS

A diagnostic system and method that (a) that uses models indicative of both successful firing and skips to determine if cylinders of a skip fire controlled internal combustion engine have successfully…

DRIVE·Aug 26·1 min read

G01M15/106 Tula Technology, Inc.

DYNAMIC VALVE CONTROL IN A SKIP FIRE CONTROLLED ENGINE

Various methods and arrangements for improving fuel economy and noise, vibration, and harshness (NVH) in a skip fire controlled engine are described. An engine controller dynamically selects a gas spr…

DRIVE·Jul 1·1 min read

F02D41/0005 Tula Technology, Inc.

FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL

Engine controllers and methods are described that facilitate skip fire control of an internal combustion engine. An engine controller determines a skip fire firing fraction and (as appropriate) associ…

DRIVE·Jul 1·1 min read

F02D17/02 Tula Technology, Inc.

EXHAUST GAS RECIRCULATION CONTROL IN A DYNAMIC SKIP FIRE ENGINE

A system and method of integrating an engine having dynamic skip fire control with an exhaust gas recirculation system in a turbocharged internal combustion engine is described. An engine control syst…

DRIVE·Jun 17·1 min read

F02M26/43 Tula Technology, Inc.

SEPARATELY DETERMINING FIRING DENSITY AND PUMPING DENSITY DURING FIRING DENSITY TRANSITIONS FOR A LEAN-BURN INTERNAL COMBUSTION ENGINE

A skip fire engine controller and method of control is described wherein during transitions from a first firing density to a second firing density, a firing density and a pumping density are separatel…

DRIVE·Jan 23·1 min read

F01N3/2033 Tula Technology, Inc.

SKIP FIRE TRANSITION CONTROL

Methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help smooth the transitions. Generally, firing fractions…

DRIVE·Oct 26·1 min read

F02D37/02 Tula Technology, Inc.

DECELERATION CYLINDER CUT-OFF

Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (DCCO) state and an operational state are described. In one aspect, transitions from DCCO begin with reactiv…

DRIVE·May 26·1 min read

F02D17/02 Tula Technology, Inc.

#Tula Technology, Inc.

NON-ROTATING CYLINDER PATTERN SELECTION FOR EQUALIZING CYLINDER USAGE IN AN INTERNAL COMBUSTION ENGINE

MANAGING ENGINE FIRING FRACTION CHANGES DURING GEAR SHIFTS

EXHAUST VALVE FAILURE DIAGNOSTICS AND MANAGEMENT

EXHAUST GAS RECIRCULATION CONTROL IN AN INTERNAL COMBUSTION ENGINE

MOTOR TORQUE SMOOTHING ON COMBUSTION ENGINES BY APPROXIMATING A PERIODIC WAVEFORM USING SINUSOIDS

DIAGNOSTIC SYSTEM AND METHOD FOR DETECTING INTERNAL COMBUSTION ENGINE FAULTS USING EXHAUST PRESSURE READINGS

CYLINDER CHARGE TRAPPING STRATEGIES BASED ON PREDICTIVE NUMBER OF SKIPS AND STAGGERED IMPLEMENTATION OF VALVETRAIN DEPENDENT OPERATIONAL STRATEGIES FOR INTERNAL COMBUSTION ENGINES

SEPARATELY DETERMINING FIRING DENSITY AND PUMPING DENSITY DURING FIRING DENSITY TRANSITIONS FOR A LEAN-BURN INTERNAL COMBUSTION ENGINE

OPTIMIZING COMBUSTION RECIPES TO IMPROVE ENGINE PERFORMANCE AND EMISSIONS FOR VARIABLE DISPLACEMENT ENGINES

EXHAUST VALVE FAILURE DIAGNOSTICS AND MANAGEMENT

MOTOR TORQUE SMOOTHING FOR RECHARGING EVENTS ON COMBUSTION ENGINES

MOTOR TORQUE SMOOTHING ON COMBUSTION ENGINES BY APPROXIMATING A PERIODIC WAVEFORM USING SINUSOIDS

USE OF DIFFERENT PNEUMATIC CYLINDER SPRING TYPES IN A VARIABLE DISPLACEMENT ENGINE FOR ENGINE AND AFTERTREATMENT SYSTEM TEMPERATURE CONTROL

FAST TORQUE RESPONSE FOR BOOSTED ENGINES

NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM

PARTICULATE FILTER SOOT MANAGEMENT FOR INTERNAL COMBUSTION ENGINES

RECHARGING MANAGEMENT FOR SKIPPING CYLINDERS

CYLINDER CHARGE TRAPPING STRATEGIES BASED ON PREDICTIVE NUMBER OF SKIPS AND STAGGERED IMPLEMENTATION OF VALVETRAIN DEPENDENT OPERATIONAL STRATEGIES FOR INTERNAL COMBUSTION ENGINES

USING SKIP FIRE WITH POWER TAKE-OFF

MACHINE LEARNING FOR MISFIRE DETECTION IN A DYNAMIC FIRING LEVEL MODULATION CONTROLLED ENGINE OF A VEHICLE

ENGINE CYLINDER OUTPUT LEVEL MODULATION

DIAGNOSTIC SYSTEM AND METHOD FOR DETECTING INTERNAL COMBUSTION ENGINE FAULTS USING EXHAUST PRESSURE READINGS

EARLY DIRECT FUEL INJECTION FOR INTERNAL COMBUSTION ENGINES

NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM

USE OF DIFFERENT PNEUMATIC CYLINDER SPRING TYPES IN A VARIABLE DISPLACEMENT ENGINE FOR ENGINE AND AFTERTREATMENT SYSTEM TEMPERATURE CONTROL

EXHAUST GAS RECIRCULATION FLOW CONTROL FOR REDUCING EMISSIONS WITH VARIABLE DISPLACEMENT INTERNAL COMBUSTION ENGINES

LEAN BURN INTERNAL COMBUSTION ENGINE EXHAUST GAS TEMPERATURE CONTROL

DIAGNOSTIC SYSTEM AND METHOD FOR DETECTING INTERNAL COMBUSTION ENGINE FAULTS USING EXHAUST PRESSURE READINGS

DYNAMIC VALVE CONTROL IN A SKIP FIRE CONTROLLED ENGINE

FIRING FRACTION MANAGEMENT IN SKIP FIRE ENGINE CONTROL

EXHAUST GAS RECIRCULATION CONTROL IN A DYNAMIC SKIP FIRE ENGINE

SEPARATELY DETERMINING FIRING DENSITY AND PUMPING DENSITY DURING FIRING DENSITY TRANSITIONS FOR A LEAN-BURN INTERNAL COMBUSTION ENGINE

SKIP FIRE TRANSITION CONTROL

DECELERATION CYLINDER CUT-OFF