Study Overview
This study evaluates the Ram 1500 Ramcharger EREV's 130 kW generator across various towing configurations and demanding drive cycles.
- Vehicles Tested: 7 configurations (base + 6 trailer combinations)
- Drive Cycles: 4 cycles (Davis Dam, I-70 Climb, Highway 75 MPH, US06)
- Starting SOC: 100% and 50%
- EREV Mode: Blended (generator assists at high power demand)
📊 Table 1: Vehicle Configurations
| Configuration | Mass (kg) | Mass (lb) | Frontal Area (m²) | Cd | Crr | Generator (kW) |
|---|
🏎️ Table 2: Maximum Generator-Only Sustainable Speed
Maximum steady-state speed achievable on flat ground using generator power (130 kW) alone, with no battery assist.
| Configuration | Max Speed (mph) | Power at Max Speed (kW) | Power at 75 mph (kW) | Can Sustain 75 mph? |
|---|
⚡ Table 3: Power Demand Summary
Peak and average power demand at the wheels. Values exceeding 130 kW are highlighted.
| Configuration | Davis Dam | I-70 Climb | Highway 75 MPH | US06 | ||||
|---|---|---|---|---|---|---|---|---|
| Peak (kW) | Avg (kW) | Peak (kW) | Avg (kW) | Peak (kW) | Avg (kW) | Peak (kW) | Avg (kW) | |
🔥 Table 4: Efficiency Results 100% SOC
Overall mi/kWh shows total energy efficiency (battery + fuel combined). This is the most accurate measure of drive cycle energy intensity.
| Configuration | Davis Dam | I-70 Climb | Highway 75 MPH | US06 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall mi/kWh | MPG | MPGe | Overall mi/kWh | MPG | MPGe | Overall mi/kWh | MPG | MPGe | Overall mi/kWh | MPG | MPGe | |
🔥 Table 5: Efficiency Results 50% SOC
Overall mi/kWh shows total energy efficiency (battery + fuel combined). This is the most accurate measure of drive cycle energy intensity.
| Configuration | Davis Dam | I-70 Climb | Highway 75 MPH | US06 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall mi/kWh | MPG | MPGe | Overall mi/kWh | MPG | MPGe | Overall mi/kWh | MPG | MPGe | Overall mi/kWh | MPG | MPGe | |
🛣️ Table 6: Multi-Cycle Range Test Results (100% SOC)
EPA-style multi-cycle range test (4×UDDS + 2×HWFET + 2×Constant 70mph).
| Configuration | Total Range (mi) | EV Range (mi) | Generator Range (mi) | Fuel Used (gal) | MPGe |
|---|
🚗 Table 7: 75 MPH Steady-State Range Test (100% SOC)
Range at constant 75 mph on flat ground starting from 100% SOC. Peak power values exceeding 130 kW generator capacity are highlighted.
Note: "Generator-Assisted Range" shows miles traveled while generator is running. When power demand exceeds 130 kW, the battery supplements the generator. All configurations deplete their 27-gallon fuel tank at roughly the same rate because the generator output is capped at 130 kW, but high-drag configurations would be speed-limited to "Max Gen Speed" after battery depletion.
| Configuration | Total Range (mi) | EV Range (mi) | Gen-Assisted Range (mi) | Peak Power (kW) | Exceeds 100kW? | Max Gen Speed (mph) |
|---|
📈 Charts
Power Demand vs Generator Capacity
MPGe Efficiency Comparison
Generator Utilization
SOC Profiles by Drive Cycle (100% SOC Start)
SOC Profiles by Drive Cycle (50% SOC Start)
Multi-Cycle Range Comparison
