What rules are you referring to?saviour stivala wrote: ↑20 Jan 2024, 05:46The 2014 rules. While 5.2.3 speaks only of out/inputs and storage of electrical power, 1.25 says ''motor generator unit-kinetic (MGU-K). The kinetic motor generator unit is the electrical machine mechanically linked to the 'DRIVETRAIN' as part of the ERS''. And 5.2.7 says ''MGU-K may only recover energy from or give back energy to the car via its mechanical link to the 'DRIVETRAIN'. This mechanical link must be of fixed speed ratio to the engine crankshaft and may be clutched''. Restarting a stalled engine by MGU-K. The first known case of a driver restarting after engine had stalled was that of Massa on the starting grid of the 2016 Malaysian GP. As per regulations when his engine stalled before the redlights went off, he signaled with both his hands and a yellow flag was promptly shown, when his engineer instructed him how to, he used one hand and managed to restart his stalled engine by MGU-K and the yellow flag was pulled off just before the red light went off so the race was started, BUT possible future engine restarts on the starting grid were killed by race director driver briefing at the next GP instructing drivers that they must signal a stalled engine on the starting grid by rising both hands. After that there was other drivers restarting their engines by MGU-K, The next one was Vettel when he restarted on the weighing scales before being pushed off the scales, he was fined for damaging the scales but not for restarting because this restart was not on the starting grid and so he did not need to rise both hands. Kime also restarted sometime after that but during a race and not on starting grid.
1.25 Motor Generator Unit - Kinetic (MGU-K) :
The Kinetic Motor Generator Unit is the electrical machine mechanically linked to the drive train as part of the ERS.
The entirety of section 5.2 is:
5.2 Other means of propulsion and energy recovery :
5.2.1 The use of any device, other than the engine described in 5.1 above, and one MGU-K, to propel the car, is not permitted.
5.2.2 Energy flows, power and ES state of charge limits are defined in the energy flow diagram shown in Appendix 3 of these regulations.
When the car is on the track a lap will be measured on each successive crossing of the timing line, however, when entering the pits the lap will end, and the next one will begin, at the start of the pit lane (as defined in the F1 Sporting Regulations).
Electrical DC measurements will be used to verify that the energy and power requirements are being respected.
A fixed efficiency correction of 0.95 will be used to monitor the maximum MGU-K power.
5.2.3 The MGU-K must be solely and permanently mechanically linked to the powertrain before the main clutch. This mechanical link must be of fixed speed ratio to the engine crankshaft.
The rotational speed of the MGU-K may not exceed 50,000rpm.
The maximum torque of the MGU-K may not exceed 200Nm. The torque will be referenced to the crankshaft speed and the fixed efficiency correction defined in Article 5.2.2 will be used to monitor the maximum MGU-K torque.
The laminate thickness of the MGU-K may not be less than 0.05mm.
5.2.4 The MGU-H must be solely mechanically linked to the exhaust turbine of a pressure charging system. This mechanical link must be of fixed speed ratio to the exhaust turbine and may be clutched.
The rotational speed of the MGU-H may not exceed 125,000rpm.
5.2.5 Cars must be fitted with homologated sensors which provide all necessary signals to the FIA data logger in order to verify the requirements above are being respected.
There is no 5.2.7.
I was responding to the statement:
Even in 2014 rules published in 2012 did not have a 5.2.7., and required the MGUK to connect to the powertrain before the main clutch.saviour stivala wrote: ↑19 Jan 2024, 18:48Which means that in 2014 the MGU-K could have been linked anywhere between the fron of the crankshaft ands the rear wheels.
There is no mention that the MGUK could be clutched, though there is for the MGUH (5.2.4).
