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 …

Various methods and arrangements for improving fuel economy and noise, vibration, and
harshness (NVH) in a skip fire controlled engine are described. An engine control ler …

A skip fire control that relies on a combination of a torque request, exhaust temperature, and
air-fuel ratio in determining firing density is described. Also, skipped firing opportunities may …

Methods, devices, controllers, and algorithms are described for operating an internal
combustion engine wherein at least some firing opportunities utilize low temperature …

An internal combustion engine operates so that it delivers zero or negative torque. The
engine operates in either a deceleration cylinder cut off (DCCO) mode or skip cylinder …

(57) ABSTRACT 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 …

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 …

A method of controlling intake and exhaust cam phase in an internal combustion engine
includes sensing an engine speed and an engine load of the internal combustion engine …

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

Various methods and arrangements for improving fuel economy and noise, vibration, and
harshness (NVH) in a skip fire controlled engine are described. An engine control ler …