Lecture 13 - Transmission II Flashcards

1
Q

Variable speed transmissions

A

Under the assumption of a traction motor with a single characteristic point, various characteristic points or a characteristic curve are obtained at the output of the torque converter

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2
Q

Characteristic map of a 4 speed transmission

A

Characteristic map of a combustion engine can be generated through fuel supply
• The starting gap must overcome with a rotational speed converter
• The mapping is to be set in such a way that the remaining gaps of the gearbox output characteristic map are as small as possible

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3
Q

Draw the characteristic map of a continuosly variable transmission (13.1)

A

draw

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4
Q

How are implemented continuosly variable transmissions?

A

In vehicle technology continuosly variable transmissions are implemented as hydrodinamic torque converters

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5
Q

What is impeller characteristic?

A

The impeller wheel of hydrodynamic torque converter develops a torque that is proportional to the square of the motor revolutions

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6
Q

What happens with the combination of a combustion engine and a hydrodynamic torque converter?

A

Only the part coincident with the impeller characteristic is exploited by the motor characteristic map

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7
Q

What are hydro-mechanic gears?

A

Are hydro-dynamic converters to which a mechanic step-transmission is up or down-streamed

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8
Q

How does the converter acts?

A

The start-up converter acts as a speed transmission and as a 1st gear, while breaking, the converter is used as a retarder

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9
Q

What happens when filling a converter only partly with oil?

A

Filling the converter only partly with oil results in an accordinly reduced torque this circumstance is exploited for slow shunting motors

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10
Q

Traction Units on Rail vehicles?

A

Energy generation: combustion engine

energy transformation and distribution: diesel-mechanical drive, diesel hydraulic drive, diesel electric drive

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11
Q

Motor control in electric machines

A

b1: electromechanical vehicle control with direct current

b2,b3: electronic vehicle control

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12
Q

Identify the parts of an axle drive with a constant gear ratio between electric motor and wheelset (13.2)

A

identify

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