Device for changing the gears automatically on a synchronized gearbox
AssigneeAutomobiles M. Berliet
InventorsJean-Paul Sibeud, Jean-Mari Noyer
Life of this patent
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Abstract
A processing device capable of starting the sequence of the speed change operations automatically in the gearbox of a vehicle, such as the automatic transmission of a truck. A first comparator (302) compares the data received from a gearbox condition detecting device (500) and that received from a speed ratio selection device (200). In the event of a difference, the comparator (302) sends to a gearbox control device (400) either a pulse for increasing by one speed ratio, or a pulse for decreasing by one speed ratio.
Claims6
A processing device for automatically controlling changes of speed in a synchronized gearbox associated with a clutch of a vehicle, comprising, in combination:
- a gearbox having change members;
- a gearbox control device (400) operatively connected with and controlling said change members of said gearbox;
- a device (200) for selection of speed ratios;
- a device (500) for detecting the condition of said gearbox;
- a first comparator (302);
- an electronic assembly including logic elements;
- said electronic assembly having an input section which includes said first comparator (302) operably and electrically connected between said speed ratio selection device (200) and said gearbox condition detecting device (500);
- said electronic assembly having its output operably and electrically connected to said gearbox control device (400) for controlling said change members of said gearbox;
- said input section of said electronic assembly also including a memory device (301) for the temporary storage of the code of a selected ratio;
- and
- said memory device (301) being operably and electrically connected between said speed ratio selection device (200) and said first comparator (302).
A processing device for automatically controlling changes of speed in a synchronized gearbox associated with a clutch of a vehicle, comprising, in combination:
- a gearbox having change members;
- a gearbox control device (400) operatively connected with and controlling said change members of said gearbox;
- a device (200) for selection of speed ratios;
- a device (500) for detecting the condition of a gearbox;
- a first comparator (302);
- an electronic assembly including logic elements;
- said electronic assembly having an input section which includes said first comparator (302) operably and electrically connected between said speed ratio selection device (200) and said gearbox condition detecting device (500);
- said electronic assembly having its output operably and electrically connected to said gearbox control device (400) for controlling said change members of said gearbox;
- and
- said first comparator (302) comprising a four-bit binary comprator.
Dependencies are inferred from the claim text.