Nitrogen oxides warm up control

A vehicle comprising:

• an engine;
• an aftertreatment system fluidly coupled to the engine to receive an exhaust gas stream from the engine, the aftertreatment system comprising:
• a passive nitrogen oxides adsorber (PNA) that stores nitrogen oxides (NOx) below a first release temperature and oxidizes hydrocarbons (HC) and carbon monoxide (CO) above a first light-off temperature;
• an electric heater (EHC) positioned downstream of the PNA;
• and
• a selective catalytic reduction (SCR) catalyst positioned downstream of the EHC, the SCR catalyst configured to reduce NOx above a second light-off temperature;
• data processing hardware;
• and
• memory hardware in communication with the data processing hardware, the memory hardware storing instructions that when executed on the data processing hardware cause the data processing hardware to perform operations comprising:
• during a first phase of a warm-up cycle, operating the engine to heat the PNA to a first temperature range that is above the first light-off temperature and below the first release temperature;
• during a second phase of the warm-up cycle, operating the engine to maintain the PNA within the first temperature range while activating the EHC to heat the SCR catalyst to a second temperature range that is at or above the second light-off temperature;
• and
• during a third phase of the warm-up cycle, subsequent to the SCR catalyst reaching the second temperature range, operating the engine to heat the PNA to a third temperature range that is at or above the first release temperature.