Charles Leclerc of Ferrari faced a power unit management problem during sprint qualifying for the Chinese Grand Prix, which cost him potential grid position. The issue arose from energy depletion on the track's long back straight in his final SQ3 lap. This incident underscores the complexities of current Formula 1 power units and hybrid strategies.
In sprint qualifying for the Chinese Grand Prix, Ferrari driver Charles Leclerc experienced a setback in the final segment, SQ3. What appeared to be a competitive lap for third place turned problematic when his power unit depleted energy earlier than rivals on the 1.2km back straight, resulting in lost time and missing a chance for the second row.
The problem stemmed from hybrid management configured with incorrect parameters, affecting energy deployment. Leclerc noted a similar issue during qualifying for the Australian Grand Prix the previous weekend, where pit return allowed a reset and corrections. However, in SQ3, no such opportunity existed on his final push lap.
Power units in Formula 1 adapt energy management based on factors like grip conditions, tire performance, and driving style. These systems now exert greater influence, particularly in qualifying where performance is pushed to extremes. Without the MGU-H support and with an MGU-K output tripled in power, optimizing energy use and recovery is crucial for lap times, and missteps can cost several tenths of a second.
Analysis of Leclerc's laps revealed subtle differences with significant impacts. In his first SQ3 attempt, he selected fourth gear between Turns 8 and 9, compared to fifth in the second push, leading to cornering speeds about 15kph higher in the latter. Before Turn 11, energy cutting began early in the first lap, with sixth gear and high revs, versus seventh gear in the second, yielding a 17kph speed difference.
This resulted in a higher peak speed of 9kph in the first attempt, achieved later, as more energy was used in acceleration, delaying derating on the straight. Over the radio, Leclerc immediately described the lap as negative, with his engineer attributing two of six tenths lost to Lewis Hamilton in the second sector to Turn 8.
Comparisons with Hamilton showed the Mercedes driver anticipated downshifts and managed throttle more conservatively between Turns 7 and 8, preserving energy. Leclerc's variations in strategy from SQ2 to SQ3 stood out among frontrunners, complicating power unit response without time for recalibration in the sprint format.
