10% FUEL SAVING ON AVERAGE

What is Surbo? Achieve red line by 1/2 throttle for manuals, and higher revs than usual for autos! Surbo price in Singapore Surbo in various countries Why choose Surbo? More horsepower with Surbo How Surbo works user-reviews-Surbo cars-fitted-with-Surbo

Surbo System's Energy Analysis For Turbo Diesel Engines

Here is a study of what happens when the Surbo acts on a turbodiesel-engined vehicle. It explains why the Surbo can bring the engine to its rpm red line with just 1/2 accelerator pressure, when most turbodiesel vehicles need full accelerator pressure for the same. The reasons are the Surbo's vortex suction, the resultant air pressure accumulation, better air scavenging through the Surbo Sytem's components (in {}), and therefore higher velocity of exhaust gases which drive the turbocharger's turbine harder and from a lower rpm. You may also read the related page How Surbo Works For Diesels for easier understanding.

Diagram below shows the air pressure accumulation within the Surbo system as the Surbo is activated through Stages 1 to 3.

This diagram shows the air flow through a Surbo-assisted diesel engine

where P1 is the initial inlet vacuum, P2 is the Surbo's pressure setting, and P3 is the back pressure formed by the temporarily decreased acceleration.

Stages/ {Surbo System Component} {Surbo (red), presses air into grey pipe} {Oil chamber, in orange} {Governer, controlled by accelerator, in white box} {Intake manifold, in light grey} {Engine, bottom block in pink} {Exhaust, no colour. Exhaust gases flow around turbocharger, spinning it so that it compresses air}
initial acceleration (Stage 1) air flows straight through is pressed to inject diesel for acceleration normal absolute pressure is sole energy source
pressure accumulation (Stage 2) begins to cross-jet and form vortex fills up with engine back pressure is held still for 1 second to reduce engine acceleration, to generate a back pressure towards the Surbo fills up with engine back pressure cylinder pressure increases due to lessened acceleration but air still rushing in exhaust back pressure increases, ready to blast air out. Turbocharger picks up speed due to exhaust pressure
vortex (Stage 3) spins air at full speed acts as air pressure accumulator is pressed slightly more and varied slightly around half way point half accelerator pressure means half as much diesel injected higher cylinder compression because of moderately increased air pressure blasts air out instantly because exhaust already under full back pressure. Turbocharger spins faster than usual, for increased boost.
scavenging: pulling gases through (Stage 3 and afterwards) vortex's suction pulls air in harder than before half accelerator pressure prevents over-fueling and smoke higher air density imparts more force to air to overcome flow friction losses abundance of air to completely burn the diesel injected higher mass flow to push through exhaust and spinning turbocharger harder than before

Read the similar study for petrol vehicles.

Related pages:

  • List of diesel vehicles fitted with Surbo
  • How Surbo works for diesel vehicles
  • How to increase engine power for diesel vehicles
  • Surbo system's energy analysis for diesel engines
  • Videos:

    Watch this video showing how engine revs with Surbo

    Watch the video above showing how an engine revs with Surbo. Or watch it with the How it works page.

    Video of Volvo XC90 T8 with Surbo, sprinting to 130 kph

    Above: video of Volvo XC90 T8 with Surbo, sprinting to 130 kph.

    Video of Volvo XC90 T8 with Surbo, sprinting to 211 kph

    Above: video of Volvo XC90 T8 with Surbo, sprinting to 211 kph.

    Video of Volvo XC90 T8 with Surbo, sprinting to 224 kph

    Above: video of Volvo XC90 T8 with Surbo, sprinting to 224 kph.

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