HYBRID++ & Electric Dynamic Skip Fire
Tula is making green tech greener through advanced technologies for electrified powertrains
How Hybrid++ works
HYBRID++ is a simplified, patented all-cylinder deactivation controls technology, that is applicable to P0 or P1 Mild Hybrid Vehicles to achieve synergistic fuel efficiency gains and significant toxic emissions reductions.
HYBRID++™ in real world situations
All cylinders fire during highway merging and the hybrid motor provides torque assist.
During low-speed cruise, the electric motor can propel the vehicle with all cylinders deactivated
Lifting off the accelerator pedal causes all cylinders to deactivate and enables more recuperation. No air pumped into the exhaust.
Hybrid++ eliminates pumping losses during coast and overrun conditions. Because air doesn’t get pumped into the exhaust during deactivation, Hybrid++ also significantly reduces the harmful emissions that otherwise come from purging the catalyst
Tula’s research findings on Dynamic Skip Fire
for Hybrid Powertrains
Click to learn more about Tula and our dedication to a cleaner Earth
DSF and 48V mild-hybrid synergies enable better fuel economy at lower cost
How eDSF works
eDSF synergystically combines cylinder deactivation with vehicle electrification to increase the operating range of DSF. By countering engine torque with motor torque at appropriate fires and skips, eDSF enables smoother operation and expansion of the DSF fly zone.
eDSF™ in real world situations
During highway cruising, the motor torque supplements the engine enabling it to fire on fewer cylinders
At low to medium loads, the expanded operating range due to torque smoothing and torque assist enables smooth and efficient eDSF operation.
Enhanced Energy Recovery: eDSF shuts off all cylinders (called DCCO for Deceleration Cut Off) allowing hybrid systems to fully capture kinetic energy through regeneration without engine braking loss.
Electrification enables smoother torque
eDSF uses the existing hybrid motor to smooth torque pulses of skip fire operation
DSF operating range is increased
Electric motor torque smoothing and torque assist extend the range of useful firing densities.