The patents may generally be divided into four categories.

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.

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
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

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
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
internal combustion engine control for improved fuel efficiency US9982611
autonomous drivingwith dynamic skip fire US9983583
implementing skip fire with start/stop feature CN106460687B
cylinder re-activation fueling control systems and methods CN105041483B

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
hybrid powertrain control CN103958312B

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 CN105189972B
induction diagnostics for skip fire engine US9995652
torque estimation in a skip fire engine control system US10012161
system and method for safe valve activation in a dynamic skip firing engine CN105556099B