Vehicle propulsion unit and method for controlling same
First Claim
1. A propulsion unit comprising:
- an engine generating an output power;
a transmission having an input and an output for driving vehicle wheels;
power take-off means having a power take-off shaft;
means for distributing said output power between said transmission input and said power take-off means such that a first fraction of said output power is directed to said transmission input whereas a second fraction of said output power is directed to said power take-off means;
means for measuring at least one of said power output fractions, said measuring means generating an output signal; and
means for limiting said first power output fraction in response to that output signal.
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Accused Products
Abstract
A propulsion unit, preferably a propulsion unit for a utility vehicle, as well as a method for controlling same are disclosed. The propulsion unit comprises an engine, a transmission and a power take-off unit having a power take-off shaft. A first fraction of the engine output power is directed to the transmission, whereas a second fraction is directed to the power take-off shaft. At least one of the power fractions is detected by means of measuring units. The power fraction transmitted to the transmission is limited to a predetermined limit value. It is, therefore, possible to install a propulsion unit with an engine, the output power of which being higher than the admissible input power of the transmission.
67 Citations
22 Claims
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1. A propulsion unit comprising:
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an engine generating an output power; a transmission having an input and an output for driving vehicle wheels; power take-off means having a power take-off shaft; means for distributing said output power between said transmission input and said power take-off means such that a first fraction of said output power is directed to said transmission input whereas a second fraction of said output power is directed to said power take-off means; means for measuring at least one of said power output fractions, said measuring means generating an output signal; and means for limiting said first power output fraction in response to that output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A utility vehicle having a propulsion unit comprising:
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an engine generating an output power; a transmission having an input and an output for driving vehicle wheels; power take-off means having a power take-off shaft; means for distributing said output power between said transmission input and said power take-off means such that a first fraction of said output power is directed to said transmission input whereas a second fraction of said output power is directed to said power take-off means; means for measuring at least one of said power output fractions, said measuring means generating an output signal; and means for limiting said first power output fraction in response to that output signal.
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13. A method for controlling a propulsion unit having:
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an engine generating an output power; a transmission having an input and an output for driving vehicle wheels; power take-off means having a power take-off shaft; and means for distributing said output power between said transmission input and said power take-off means such that a first fraction of said output power is directed to said transmission input whereas a second fraction of said output power is directed to said power take-off means, wherein said method comprises the steps of; measuring at least one of said output power fractions; and limiting said first output power fraction to a predetermined limit value. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification