Translation of "Startdrehzahl" in English

In step 20, it is checked whether the rotational starting speed has been reached.

Vibrations and noises are already damped from the starting engine speed.

The higher the starting speed, the correspondingly more quickly are the dead volumes 3 pumped out.

Furthermore, the influence of the starting speed is taken into consideration, by way of a second factor.

With a higher starting speed, a shorter starting time is achieved.

The maximum limit rotational speed n limit can correspond to a starting rotational speed n STR .

At other starting temperatures and other or undefined marginal parameters, the rotational starting speed is essentially accidental.

When the engine is started, it is brought to a starting rpm with the aid of a starter.

If the starting speed is not reached in the starting attempt being considered, then that starting attempt is broken off.

Starting from this starting rotational speed the starting process is performed by controlling the slippage based on a target slippage characteristic.

At a cranking speed of 150 rpm, the crankshaft makes 2.5 revolutions per second.

The remaining time in which no injection of diesel is effected in the application example corresponds approximately to the time required by the starter to accelerate the engine to starting speed.

The capacitor ignition system of claim 1, wherein the magnetic generator comprises a rotating magnet wheel, the starting ignition advance characteristic comprises means for releasing ignition pulses only above a limiting rpm above the starting rpm in the range of 1,000 to 2,000 rpm, and further comprising second means for producing an ignition pulse at a given position of said magnet wheel after passing through top dead center, whereby at rpm up to said starting rpm, the only firing pulses available for said engine are ignition pulses produced by the second means.

The amount of fuel supplied in this case follows a certain curve, which is plotted either in relation to time or to the speed of the internal combustion engine during starting, which curve may be shaped such that during a first phase a constant supplementary feed of fuel is supplied until a preset number of ignitions or revolutions of the internal combustion engine is reached (plateau region); following the plateau region there is a supplementary feed reduction phase in which the amount of fuel supplied drops linearly or follows steep-drop functions up to a transition region, which commences for example upon reaching an upper starting speed and characterizes the transition into so-called after-starting enrichment or warm running.

As soon as the upper starting speed NST3T is reached (transition into after-starting and warm-running), the frequency control is cancelled.

As a result of the defined rotational starting speed, a synchronization of the control units, of the transmission line and of the first firing of the internal-combustion engine can take place.

First, based on different engine operating or internal-combustion engine parameters, a rotational starting speed is determined during the starting operation (step 10).

Under defined marginal parameters, such as the oil viscosity, the battery condition, the voltage drop, the compression quality, etc., a certain rotational starting speed occurs at a defined cold-start limit temperature.

This results in a much more precise adjustment than in the case of conventional starting devices, wherein the adjustment cannot be coordinated with the rotational starting speed in the required manner.

In order to achieve a good balancing of energy, the acceleration up to the defined rotational starting speed takes place with a torque which is optimal for the starting motor and the internal-combustion engine.

Simultaneously with suitable control of the pulse inverter elements its guaranteed that during the starting of the electrical machine electrical energy can be taken from the battery and thereby operate as an electric motor and the vehicle motor can be accelerated to the starting rotary speed.

Operation, however, is problematic at low engine rotational speeds and at the starting rotational speed of the engine because the torque fluctuations become smaller, at an average drive torque, because of decreasing mass forces.

From experience and data analysis, Thompson has found that if he backs off the ignition timing by a couple of degrees, while at the same time, allowing the engine to reach full cranking speed before powering the ignition system, the number of kick backs has been greatly reduced.

As a result of his investigations, Thompson determined that the average cranking speed of 150 rpm might be too slow to have good startups.

A corresponding NVH test is performed, with the second gear engaged, from a starting rotational speed up to an admissible maximum rotational speed of generally a few thousand revolutions per minute.

By means of the slipping clutch, it is ensured that the component transmissions themselves are not locked, which is not permitted in the NVH test because, as the individual gears are run through, with a generally constant degree of clutch engagement of the component clutches, from a starting rotational speed up to a predefined maximum rotational speed, various sensors on the transmission are used to detect acoustic artifacts that indicate problems and faults of the, in particular, dual-clutch transmission.