Engine control systems and methods for starting an engine

An engine control system, comprising:

• at least one processor;
• and
• a memory, operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the engine control system to perform a method, the method comprising transmitting, by the at least one processor, one or more engine control signals to:
• cause a crankshaft of an engine to rotate through a first plurality of rotations, and
• cause, for each of a first set of combustion chambers of the engine, an exhaust valve of the combustion chamber to remain in an opened position while the crankshaft rotates through the first plurality of rotations and without fuel being injected into the combustion chamber, and
• cause, for each of a second set of combustion chambers of the engine, the exhaust valve of the combustion chamber to open and close while the crankshaft rotates through the first plurality of rotations and prior to fuel being injected into the combustion chamber.

An engine control system for a vehicle, comprising:

• at least one processor;
• and
• a memory, operatively connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the engine control system to perform a method, the method comprising transmitting, by the at least one processor, one or more engine control signals to:
• cause a crankshaft of an engine of the vehicle to begin to rotate and to rotate through a first plurality of rotations, and
• cause, for each of a first set of combustion chambers of the engine, a valve of the combustion chamber to remain in an opened position while the crankshaft rotates through the first plurality of rotations,
• cause, for each of a second set of combustion chambers of the engine, a valve of the combustion chamber to open and close while the crankshaft rotates through the first plurality of rotations and prior to fuel being injected into the combustion chamber.