The biggest criticism leveled against modern hybrids—and specifically Honda’s e: HEV system—is the “rubber band effect.” You press the throttle, the engine revs to the moon, but the car catches up seconds later. It is efficient, yes. But it is emotionally disconnected. Enthusiasts feared the return of the Prelude would suffer the same fate.
However, engineers found a solution using the new Honda S+ Shift technology. Typically, Honda didn’t solve it with software alone; they solved it with a mix of physics and psychoacoustics. It debuts in its perfected form on the new Prelude concept.
Most manufacturers simulate gear shifts in a CVT by artificially cutting throttle or ignition timing to drop RPM. It’s a parlor trick. It feels fake because the torque delivery is interrupted, but the mechanical connection remains static.
Honda S+ Shift takes a fundamentally different approach. They aren’t just modulating the RPM; they are physically altering the electromagnetic interaction inside the generator and synchronizing it with harmonic sound frequencies.
The heart of the system lies in the generator’s stator. In a standard hybrid setup, as the Internal Combustion Engine (ICE) spins the generator rotor faster, the voltage spikes linearly. To keep the voltage usable, the engine speed is usually held constant (the “drone”).
The Honda S+ Shift system introduces a variable: The Electronic Speed Controller. This controller dynamically adjusts the number of active copper coils in the stator.
- Low RPM: More coils are active.
- High RPM: The system physically disconnects/bypasses specific coils.
By reducing the number of active coils as the engine speed increases, the system prevents the voltage from spiking out of control. This allows the ICE to rev higher and faster while maintaining a constant, usable voltage to the traction motor.
For the Prelude, engineers utilized Honda S+ Shift to create 8 Virtual Gears. Why 8? Because it matches the torque characteristics of the 2.0-liter hybrid engine. The sensation is indistinguishable from that of a high-quality torque-converter automatic (comparable to an 8-speed DCT).
But the real magic happens during deceleration. Until now, the metal paddles on Honda hybrids (such as the Civic e:HEV) have only been used for regenerative braking. In the Prelude, when S+ Mode is active, they become true shifters. Downshifting creates a sharp “blipping” effect. The generator motor temporarily adjusts power generation to spike engine speed, replicating a heel-and-toe downshift. It provides genuine engine braking—strong enough to feel like a mechanical lock-up on slippery surfaces.
Physics creates the feeling, but sound creates the emotion. Honda admits to using Active Sound Control (ASC), but not to faking a V8 noise. The system “cleans” the 4-cylinder engine’s natural frequency to match the Honda S+ Shift points.
- Low RPM: It emphasizes the second-order harmonics (bass) for a powerful feel.
- Redline: It adds seventh-order harmonics to create a screaming, high-revving character.
It’s a curated reality, designed to sync perfectly with the “steps” created by the electromagnetic generator.
The Honda S+ Shift is a classic example of Honda over-engineering. They redesigned the generator’s internal architecture to create a mechanical feel in an electrical system. With the S+ Mode perfected for the upcoming Prelude, Honda is proving that the electrified future doesn’t have to sound like a vacuum cleaner. It can still have a soul. An electrified future doesn’t have to sound like a vacuum cleaner. It can still have a soul.
