There are five categories of patents.

The first category, Core DSF, covers primarily determining the density and sequence of combustion events. The second category, Vehicle Integration, covers primarily the impact on other vehicle systems of DSF operation and vice versa. The third category, Alternative Engines, covers primarily engines using a working cycle other than an Otto cycle, and powertrains with auxiliary power sources. This category includes Diesel engines, hybrid powertrains, and engines with

multiple firing levels. The fourth category, Diagnostics, covers primarily systems and methods for determining faults, generally those related to DSF operation.
The fifth category, DMD, covers primarily the application of Tula’s pulse density controls approach to electric motor systems.

This web page is provided to address the virtual patent marking provisions of various jurisdictions. Additional patents are pending, both in the United States, China, Germany, Japan, South Korea, India, Europe, and Brazil.

Core DSF

Patent Titles

Patent Number

internal combustion engine control for improved efficiency US7577511
internal combustion engine control for improved efficiency US7849835
internal combustion engine control for improved efficiency US7886715
internal combustion engine control for improved efficiency US7954474
internal combustion engine control for improved efficiency US8099224
internal combustion engine control for improved efficiency US8131445
internal combustion engine control for improved efficiency US8131447
internal combustion engine control for improved efficiency US8336521
skip fire engine control US8499743
internal combustion engine control for improved efficiency US8616181
internal combustion engine control for improved efficiency US8701628
control of a partial cylinder deactivation engine US8839766
skip fire internal combustion engine control US8869773
skip fire internal combustion engine control US9020735
firing fraction management in skip fire engine control US9086020
managing engine firing patterns and pattern transitions during skip fire engine operation US9200575
look-up table based skip fire engine control US9200587
split bank and multimode skip fire operation US9239037
Cylinder firing fraction determination and control systems and methods US9441550
firing fraction management in skip fire engine control US9528446
firing fraction management in skip fire engine control US9650971
method and apparatus for determining optimum skip fire firing profile with adjustments for ambient temperature US9739212
skip fire transition control US9745905
skip fire transition control US9777658
firing fraction management in skip fire engine control US9964051
skip fire transition control US10107211
firing fraction transition control US10138860
managing skip fire phase transitions US10161328
Method and apparatus for determining optimum skip fire firing profile US10247121
internal combustion engine control for improved efficiency US10273894
managing firing phase transitions US10393085
firing fraction management in skip fire engine control US10508604
method and apparatus for determining optimum skip fire firing profile US10941722
firing fraction management in skip fire engine control US10968841
internal combustion engine control for improved efficiency JP5395899
internal combustion engine control for improved efficiency DE112011100224B4
internal combustion engine control for improved efficiency CN102089511B
internal combustion engine control for improved efficiency CN102713215B
internal combustion engine control for improved efficiency KR101578338
firing fraction management in skip fire engine control JP6041363
control of a partial cylinder deactivation engine CN104204473B
firing fraction management in skip fire engine control CN103890351B
managing engine firing patterns and pattern transitions duringskip fire engine operation DE112014001434B4
firing fraction management in skip fire engine control JP6255018
Cylinder firing fraction determination and control systems and methods CN105317566B
firing fraction management in skip fire engine control KR101849438
firing fraction management in skip fire engine control KR101858425
firing fraction management in skip fire engine control CN107120203B
firing fraction management in skip fire engine control CN104520563B
Internal Combustion Engine Control for Improved Fuel Efficiency IN305277
Firing fraction management in skip fire engine control CN107131083B
Firing fraction management in skip fire engine control KR101955146
Firing fraction management in skip fire engine control KR101957627
ignition ratio management in skip fire engine control JP6484210
method and apparatus for determining optimum skip fire firing profile CN106068373B
control of a partial cylinder deactivation engine DE112013001783B4
firing fraction management in skip fire engine control BR112014008608-7
skip fire transition control CN106715872B
firing fraction management in skip fire engine control CN107131067B
firing fraction management in skip fire engine control DE112012007306
internal combustion engine control for improved fuel efficiency EP2307688
Internal combustion engine control for improved fuel efficiency DE602009063554.9
firing fraction management in skip fire engine control DE112012004327B4
internal combustion engine control for improved fuel efficiency FR2307688
skip fire transition control CN11098526B
firing fraction management in skip fire engine control BR112015002675-3
skip fire transition control CN110953109B
skip fire transition control CN111022196B
firing fraction management in skip fire engine control US11280276
managing skip fire phase transitions CN109863291B
firing fraction management in skip fire engine control IN410073

Vehicle Integration

Patent Titles

Patent Number

system and methods for improving efficiency in internal combustion engines US8402942
skip fire engine control US8511281
skip fire engine control US8651091
skip fire engine control US9120478
drive train slip for vibration mitigation during skip fire operation US9267454
control of manifold vacuum in skip fire operation US9273643
cam phaser control US9291106
engine braking controller US9328672
implementing skip fire with start/stop feature US9387849
torque converter lock up during skip fire operation US9422880
Cylinder re-activation fueling control systems and methods US9429081
torque compensation for detonation US9482202
averaging filter for skip fire engine operation US9494088
internal combustion engine control for improved fuel efficiency US9541050
using cylinder firing history for combustion control in a skip fire engine US9664130
multi-level skip fire US9689327
implementing skip fire with start/stop feature US9725082
system for managing catalytic converter temperature US9726094
deceleration cylinder cut-off US9790867
coordination of vehicle actuators during firing fraction transitions US9878718
coordination of vehicle actuators during firing fraction transitions US9926868
manifold pressure and air charge model US9945313
internal combustion engine control for improved fuel efficiency US9982611
autonomous driving with dynamic skip fire US9983583
coordination of vehicle actuators during firing fraction transitions US10094313
dynamically varying an amount of slippage of a torque converter clutch provider between an engine and a transmission of a vehicle US10100754
coordination of vehicle actuators during firing fraction transitions US10259461
air charge estimation for use in engine control US10253706
autonomous driving with dynamic skip fire US10303169
noise/vibration reduction control US10400691
engine control in fuel and/or cylinder cut off modes based on intake manifold pressure US10408140
noise/vibration control using variable spring absorber US10493836
system and method for improving fuel economy for autonomous driving vehicles US10518764
dynamically varying an amount of slippage of torque converter clutch provided between an engine US10519876
managing engine firing fraction changes during gear shifts US10611359
dynamic valve control in a skip fire controlled engine US10619584
noise/vibration reduction control US10634076
autonomous driving with dynamic skip fire US10635105
managing engine firing fraction changes during gear shifts US10814858
engine diagnostics during cylinder cut off operation US10900425
adaptation of skip fire calibration to vehicle weight US10927780
split direct injection for reactivated cylinders of an internal combustion engine US10982617
control of manifold vacuum in skip fire operation CN104541037B
internal combustion engine control for improved fuel efficiency KR101643526
internal combustion engine control for improved fuel efficiency KR101655717
internal combustion engine control for improved fuel efficiency JP6067503
internal combustion engine control for improved fuel efficiency JP6113807
internal combustion engine control for improved fuel efficiency CN104481713B
internal combustion engine control for improved fuel efficiency KR101767862
implementing skip fire with start/stop feature CN106460687B
cylinder re-activation fueling control systems and methods CN105041483B
Deceleration cylinder cut-off CN107407212B
torque compensation for detonation CN105934574B
coordination of vehicle actuators during firing fraction transitions JP6810477
coordination of vehicle actuators during firing fraction transitions KR102223002
determine firing & pumping density during firing density transitions for a lean-burn ice US11053828
compression ignition engine exhaust gas temperature control US11060430
using SF cylinder deact while in reverse US11078854
dDSF charge flow & egr mngmnt US11131259
coordination of vehicle actuators during firing fraction transitions CN109312675B
autonomous driving with dynamic skip fire CN109563782B
edDSF torque smoothing for recharging & NVH reduction US11143125
fast torque response for boosted engines US11248546
dynamic valve control in a skip fire controlled engine US11261807
managing engine firing fraction changes during gear shifts US11260844
use of different pneumatic cylinder spring types in a variable displacement engine for engine and after treatment system temperature control US11306672
dDSF charge flow & egr Management US11326532
early direct fuel injection for internal combustion engines US11333099
DCCO US11352966
Cyl chrg trapng strats based on predictive skips & staggered valvetrain US11352967
DSF transitions for fixed cda engines US11359561
deceleration cylinder cut-off in a hybrid vehicle CN110573716B
dynamic valve control in a skip fire controlled engine CN110637153B
eDSF torque smoothing for recharging & NVH reduction US11421613
disabling skip fire based on vehicle location & local regulations US11428133
exhaust gas recirculation control in dynamic skip fire engine US11441519
firing fraction transition delay method US11459965
using SF cylinder deact while in reverse US11486321
Cyl chrg traping strats based on predictive skips & staggered valvetrain dependent operational strategies for ICE US11492987
skip cylinder compression braking US11549455
NVH reduction in a SF engine control system US11555461
Particulate filter soot management for internal combustion engines US11560822
dDSF charge flow & EGR mngmnt US11619187
use of different pneumatic cylinder spring types in a variable displancement engine for engine and aftertreatment system temperature control US11624331
exhaust gas recirculation control in a dynamic skip fire engine US11624341
fast torque response for boosted engines US11635035
exhaust gas recirculation control in a dynamic skip fire engine CN114930007B
managing engine firing fraction changes US11685380
method for determininig pilot injection mass US11713728
motor torque smoothing by approximating periodic sinusoid waveform US11719175
DSF transitions FOR for fixed CDA engines US11761395

Alternative Engine

Patent Titles

Patent Number

hybrid vehicle with cylinder deactivation US8464690
system and methods for stoichiometric compression ignition engine control US8646435
hybrid powertrain control US8880258
hybrid vehicle with cylinder deactivation US8892330
internal combustion engine control for improved fuel efficiency US9086024
multi-level skip fire US9399964
multi-level skip fire US9476373
noise, vibration and harshness reduction in a skip fire engine control system US9512794
multi-level skip fire US9689328
engine torque smoothing US10060368
multi-level skip fire US10072592
deceleration cylinder cut-off in a hybrid vehicle US10167799
engine torque smoothing US10196995
Noise, vibration and harshness reduction in a skip fire engine cntrol system US10221786
Internal combustion engine using variable valve lift and skip fire control US10233796
Compression ignition engine exhaust gas temperature control US10247072
Adaptive torque mitigation by micro-hybrid system US10344692
engine torque smoothing US10436133
lean burn internal combustion engine exhaust gas temperature control US10494971
multi-level skip fire US10557427
Adaptive torque mitigation by micro-hybrid system US10578037
internal combustion engine air charge control US10662883
engine torque smoothing US10787979
dynamic charge compression ignition engine with multiple aftertreatment systems US10808672
determining firing density of a skip fire controlled lean-burn engine using air-fuel ratio and exhaust temperatures US10823029
noise, vibration and harshness reduction in a skip fire engine control system US10830166
multi-level firing engine control US10837382
adaptive torque mitigation by micro+hybrid system US10954877
dynamic charge compression ignition engine with multiple aftertreatment systems US11008995
hybrid powertrain control CN103958312B
multi-level skip fire CN107076041B
Noise, vibration and harshness reduction in a skip fire engine control system CN107110039B
Noise, vibration and harshness reduction in a skip fire engine control system JP6524546
multi-level skip fire DE112015005091B4
multi-level skip fire JP6568214
noise, vibration and harshness reduction in a skip fire engine control system DE112016000318B4
multi-level skip fire CN109026493B
multi-level skip fire CN109026407B
multi-level skip fire CN109139278B
multi-level skip fire CN109026411B
multi-level skip fire JP685032
multi-level skip fire CN109113878B
noise, vibration and harshness reduction in a skip fire engine control system CN110043377B
determine firing & pumping density during firing density transitions for lean-burn ice US11053828
compression ignition exhaust gas temperature control US11060430
NVH reduction in a skip fire engine control system US11136928
NVH reduction in a skip fire engine control system CN110043378B
engine torque smoothing CN109641587B
NVH reduction in a skip fire engine control system CN110067663B
NVH reduction in a skip fire engine control system CN109989841B
eMotor torque smoothing for recharging US11208093
engine torque smoothing US11208964
multi-level firing engine control US11236689
engine cyliner output level modulation US11236690
lean burn internal combustion engine exhaust gas temperature control CN108350819B
adaptive torque mitigation by micro-hybrid system CN110352297B
determining firing density of a skip fire controlled lean-burn engine using air-fuel ratio and exhaust temperatures US11300026
compression ignition engine exhaust gas temperature control US11333053
multi-level skip fire JP7030341
dynamic charge compression ignition engine with multiple aftertreatment systems CN110832176B
noise, vibration and harshness reduction in a skip fire engine control system KR102408785
NVH reduction in a SF engine control system US11359562
integrated CDA with electrified powertrain US11378022
eMotor torque smoothing for recharging US11560135
compression ignition engine exhaust gas temperature control US11560818
compression ignition engine exhaust gas temperature control US11674423
determining firing density of a skip fire controlled lean-burn engine using air-fuel ratio and exhaust temperatures US11680505

Diagnostics

Patent Titles

Patent Number

system and method for safe valve activation in a dynamic skip firing engine US9175613
engine diagnostics with skip fire control US9212610
misfire detection system US9399963
valve fault detection US9562470
determination of a high pressure exhaust spring in a cylinder of an internal combustion engine US9581097
engine diagnostics with skip fire control US9581098
system and method for safe valve activation in a dynamic skip firing engine US9650923
misfire detection in a dynamic skip fire engine US9784644
induction diagnostics for skip fire engine US9835522
valve fault detection US9890732
induction diagnostics for skip fire engine US9891137
induction diagnostics for skip fire engine US9995652
torque estimation in a skip fire engine control system US10012161
misfire detection in a dynamic skip fire engine US10088388
machine learning for misfire detection in dynamic firing level modulation controlled engine of a vehicle US10816438
induction diagnostics for skip fire engine CN105189972B
system and method for safe valve activation in a dynamic skip firing engine CN105556099B
Engine diagnostics with skip fire control CN108049977B
Engine diagnostics with skip fire control CN105189979B
misfire detection system DE112014001479B4
system and method for safe valve activation in a dynamic skip firing engine JP6672392
Engine diagnostics with skip fire control CN108049978B
induction diagnostics for skip fire engine CN106795827B
machine learning for misfire detection in dynamic firing level modulation controlled engine of a vehicle US11125175
diagnostic system and method for detecting internal combustion engine faults using exhaust pressure readings US11143575
torque estimation in a skip fire engine control system CN109312677B
ml for misfire detection in a dynamic firing level modulation controlled engine of a vehicle US11326534
dianostic system and method for detecting internal combustion engine faults using exhaust pressure readings US11415483
Machine learning for engine fault diagnostics US11434839
Misfire detection system DE112014007304B
exhaust valve failure diagnostics and management US11624335
diagnostics system and method for detecting internal combustion engine faults using exhaust pressure readings US11635350

DMD

Patent Titles

Patent Number

Pulsed Electric Motor Control US10742155
Boosted converted for pulsed electric machine control US10944352
pulsed electric machine control for reducing nvh US11077759
Pulsed Electric Motor Control US11088644
magnetically de-coupled, separately controlled, mutiple electric machine assembly for driving a common shaft US11133763
pulsed electric machine control using tables US11133767
pulse modulated control with field weakening for improved motor efficiency US11167648
pulse electric motor control US11228272
optimizing battery efficiency by DMD controller for electric motor US11345241
pulsed electric motor JP7082679
pulsed electric machine control using tables US11427177
magnetically de-coupled, separately controlled, multiple electric machine assembly for driving a common shaft US11545918
reducing vibration for elec motors US11557996
pulse modulated control with field weakening for improve motor efficiency US11623529
pulsed electric motor contorl US11626827
pulsed electric machine control for reducing NVH US11628730
HW electro-mechanical arrangement US11637466
optimizing waveforms for elec motors US11637513
optimizing battery efficiency by DMD controller for electric motor US11673476
eMachines with efficient torque transmission US11695361
boosted converter for pulsed electric machine control KR102561505
pulsed electric motor IN420413