F1 cars will have to run on electrical power only in the pit lane from 2014.

The technical rules for 2014 published by the FIA state cars must run “in electric mode” with “no ignition and no fuel supply to the engine at all times when being driven in the pit lane.”

Teams will be able to use both kinetic energy recovery and, for the first time, also recover energy from exhaust heat.

The kinetic element of the system will be twice as powerful as that used today with 120kW available.

The rules also define the new 1.6-litre V6 engines which will be introduced. These will be limited to 15,000rpm, down from 18,000 today.

They will retain the same 90-degree V-angle, and be restricted to a maximum fuel flow of 100kg/h.

The design, dimensions and materials used in the new engines are defined in more specific terms by the rules than the current V8s, which were introduced in 2006.

Self-starting motors

A further change to the rules will enable F1 cars to do something every road car is capable of – start on its own.

The rules will require drivers to be able to start the engine “when seated normally at the wheel and without any external assistance.”

This should put an end to drivers retiring from races because of stalled engines.

Minimum weight increase

The minimum weight of the cars will increase again, to 660kg (from 640kg).

A minimum weight for the power unit (including the engine and energy recovery system) has been set at 155kg – previously the engine alone was subject to a minimum weight of 95kg.

Smaller front wings

An addition to the rules on bodywork will reduce the size of front wings. At present these may use the full 1,800mm width of the cars – from 2014 they will be cut to 1,650mm.

Further tightening of restrictions at the front and rear of the car, and around the middle of the car to continue the work begun in the 2009 regulations changes to ‘clean up’ the appearance of the cars and reduce the number of small aerodynamic appendages.

Extra gear

The number of forward gears will be increased to eight – and no fewer.

The FIA will allow a dispensation in 2014 when teams nominate which gear ratios they will use: “For 2014 only, a competitor may re-nominate these ratios once within the Championship season, in which case the original nomination becomes immediately void.

“Ratio re-nominations must be declared as a set and may only be effected by the substitution of change gears.”