Three UP

Innovative concept of a turbocharged four cylinder engine with deactivation of one  cylinder

Crank Star Scheme

Crank star scheme of a 4 -cylinder engine with 3 cylinder
firing interval of 120 degrees

Torque raise at low engine speeds

Torque raise at low engine speeds

3 Cylinder firing order versus 4 Cylinder firing order

Measured turbocharger speed over engine speed

Measured turbocharger speed over engine speed

3-Cylinder firing order and 4 Cylinder firing order

Comparison of the indicated specific fuel consumption

Comparison of the indicated specific fuel consumption

 at BMEP = 2 bar and 3 bar

Fuel consumption advantage

Fuel consumption advantage

with one and with two deactivated cylinders

Operating range comparison

Operating range comparison

with 2 active and 3 active cylinders

Simulated exhaust gas mass flow

Simulated exhaust gas mass flow

Free mass forces and moments of inertia

Free mass forces and moments of inertia