Latest North American road test results show，Cummins Dukebo cylinder deactivation technology has a significant fuel-saving effect，It can improve the fuel economy and environmental protection of heavy trucks。

According to SAE standardized fuel consumption test（SAEJ1321），Under full load operation condition of high-speed line，Truck equipped with cylinder deactivation compared to truck without cylinder deactivation，Fuel saving can be realized2.76%。The fuel saving can be realized under the operation condition of the suburban line.2%。

Upcoming EPA 2027（EPA27）And Euro VII（Euro 7）Emission regulations，It puts forward higher requirements for nitrogen oxides and carbon dioxide emissions.。According to EU regulations，CO2 emissions from new vehicles need to be significantly reduced。

 

When the engine is under low load condition：

Keep the intake and exhaust valves of the designated cylinder closed and stop fuel injection，To reduce fuel consumption。

When additional engine braking is required：

The same cylinder deactivation components enable the latest generation of compression-release braking——1.5-stroke high power braking。

The cylinder deactivation technology can improve the exhaust temperature of the engine under low load conditions.，And improve that conversion efficiency of the post-treatment.，Reduce harmful gas emission。At the same time，It can also eliminate the reverse towing of the engine.（Vehicle coasting）Cooling effect of gas flow on aftertreatment。

 

 

1

The cylinder deactivation technique is used，Accord to that real-time torque demand of the driver,，Reduce the number of ignition cylinders，And fuel consumption is save。

2

In ignition cylinder，Higher loads and temperatures，In the deactivated cylinder，And that friction work Los is reduced。

3

In the remaining ignition cylinder，Reduce airflow，Reduce the air-fuel ratio，Helps maintain exhaust system temperature at critical 250℃Above，Allow that selective catalytic reduction（SCR）Carry out high-efficiency nitrogen oxide conversion，Diesel particulate filter（DPF）Maintain continuous passive regeneration。

 

 

 

 

At present，The cylinder deactivation system has been applied to more than 20 development projects.，Wide range of engine displacement，From 2 litres to 16 litres，Some of these projects have entered the vehicle testing phase.。