Cherrier Vivace & Tograc 48V MHEV System 1.0.0

Cherrier Vivace & Tograc 48V Mild Hybrid (MHEV)

A highly authentic, OEM-grade 48V Belt-Integrated Starter Generator (BISG) Mild Hybrid powertrain expansion for the Cherrier Vivace and Tograc lineup. Engineered with custom 2000 Hz powertrain physics, thermodynamic fuel-compensation modeling, and complete in-cabin digital instrument cluster integration.

Features Overview

1. 48V Belt-Integrated Starter Generator (BISG)
* Vitesco 48V Motor/Generator: High-efficiency permanent magnet machine connected via a 2.5:1 accessory drive belt, providing up to 11.5 kW (~16 PS) and 50–55 Nm of instant crankshaft assistance.
* 48V Lithium-Ion Battery Pack: Configurable usable capacity (0.38 kWh OEM / 0.65 kWh Extended / 1.0 kWh Heavy Duty) located under the passenger compartment floor with realistic thermal and DC-DC base load drains.
* Sensitive Turbo-Lag Torque Fill: Instantly fills the low-RPM transient boost hole (800–2200 RPM) during throttle tip-in, delivering responsive city drivability before the turbocharger fully spools.
* Dynamic E-Boost (Kickdown Overboost): Delivers full electric assistance under high engine loads for up to 16 seconds without draining the battery pack.
* Load Point Shifting / Active Load Charging: Intelligent hysteresis charging when SOC drops below 20%. Automatically engages on 3rd gear and above during cruising, raising the engine load point while burning the exact thermodynamic fuel equivalent to recharge the 48V battery.

2. OEM Rolling & Stationary Auto Start-Stop
* Instant Silent Belt Restart (< 200 ms): Engine is smoothly spun up directly through the 48V BISG accessory belt without engaging the conventional 12V pinion starter.
* Rolling Auto-Stop Selector: Selectable speed thresholds in the UI app (< 8 km/h, < 15 km/h OEM default, < 21 km/h).
* OEM Safety & Comfort Inhibitors: Start-Stop automatically inhibits or triggers restart on:
- Cold engine coolant (< 62°C)
- Steep incline/grade (> 11% slope)
- Heavy steering wheel input (> 35° or > 105° turn)
- Rollaway roll protection (> 4.5 km/h in Neutral)
- Thermal engine protection (> 106°C coolant / > 115°C oil)
- Automatic restart on brake release (7-DCT) or clutch release (Manual)

3. 1-Cylinder Deactivation (2-CYL ECO)
* In Comfort and Eco modes under light cruising load (1300–3800 RPM, throttle < 20%), Cylinder #1 is electro-mechanically deactivated in ~14 ms, reducing pumping losses and cutting fuel consumption by ~7.5%.

4. Interactive Digital Cluster & VivaceMhevMonitor App
* Digital Instrument Cluster Gauges: Custom live MHEV layer featuring the green (A) Auto Start-Stop readiness status, dynamic Power/Charge curved sweep bar, and smart Gear Shift Indicator (GSI).
* Ultrasonic Park Assist (PDC): 8-channel front and rear radar sensors with live obstacle distance tracking on the central infotainment display and distance-proportional acoustic beeps.
* VivaceMhevMonitor UI App: Fully customizable modern telemetry dashboard with dark mode styling, opacity controls, live power/torque readouts, and quick toggle switches.

Factory Vehicle Configurations

* 110 48V MHEV (M): 1.2L I3 Turbo (125 hp combined), 6-speed manual gearbox, 0.65 kWh 48V pack, standard trim.
* 155 48V MHEV (M): 1.2L I3 High-Boost Turbo (155 hp combined / 270 Nm), 6-speed manual, Sport MHEV calibration, adaptive dampers, 17-inch alloy wheels, panoramic glass roof.
* 155 48V MHEV (DCT): 1.2L I3 High-Boost Turbo (155 hp combined), 7-speed Dual-Clutch transmission with paddle shifters, brake-release auto restart, and adaptive chassis.
* Tograc 110 48V MHEV (M): Crossover body style with 1.2L I3 Turbo, 6-speed manual, rough-road suspension, and terrain Start-Stop calibration.

* Developed with assistance from AI.