Sliding Mode Control for Diesel Engine Air Path Subject to Matched and Unmatched Disturbances Using Extended State Observer

Table 1

Nomenclature of the diesel engine variables.

Variables	Name	Units
𝑝1	Intake manifold pressure	Pa
𝑝2	Exhaust manifold pressure	Pa
𝑃𝑐	Compressor power	W
𝑃𝑡	Turbine power	W
𝑊𝑐	Compressor mass flow	Kg/s
𝑊𝑡	Turbine mass flow	Kg/s
𝑊𝑓	Fueling mass flow rate	Kg/s
𝜂𝑣	Engine volumetric efficiency	—
𝜂𝑐	Compressor isentropic efficiency	—
𝜂𝑡	Turbine isentropic efficiency	—
𝜂𝑚	Turbocharger mechanical efficiency	—
𝑉1	Intake manifold volume	m^3
𝑉2	Exhaust manifold volume	m^3
𝑉𝑑	Engine volume cylinder	m^3
𝑇𝑎	Ambient temperature	K
𝑇1	Intake manifold temperature	K
𝑇2	Exhaust manifold temperature	K
𝑅𝑎	Specific gas constant	J/Kg/K