Self-propelled civil engineering machine and in particular a road-milling machine, road recycler or road stabilizer

摘要

The invention relates to a self-propelled civil engineering machine, in particular a road-milling machine, a road recycler, or a road stabilizer, having a frame carried by a set of running gear, a working unit for performing work required for the civil engineering operation, and in particular a working drum, and a drive unit carried by the frame of the machine, to drive the working drum. A power transmitter is used to transmit the driving power from the drive unit to the working unit. The drive unit of the self-propelled civil engineering machine has a first and a second drive engine, the power transmitter being so designed that the driving powers coming from the first and the second drive engines can be transmitted to the working unit together. With the design of drive according to the invention, a particularly space-saving construction is obtained for the drive and this allows the power of the drive unit to be increased without having to exceed the present width for transport of the self-propelled civil engineering machine.

主权项

1. A method of driving a working unit of a self-propelled civil engineering machine, the machine including:
a frame having a direction of travel; a milling drum supported from the frame for working engagement with a ground surface, the milling drum having a drum axis; a first internal combustion drive engine arranged on the frame transversely to the direction of travel; and a second internal combustion drive engine arranged on the frame transversely to the direction of travel, the second internal combustion drive engine being substantially parallel to the first internal combustion drive engine and non-coaxial with the first internal combustion drive engine, the first and second engines being arranged next to one another in a plane located above the milling drum axis; the method comprising: (a) operating the first internal combustion drive engine to produce a first driving power; (b) operating the second internal combustion drive engine to produce a second driving power; and (c) adding together and transmitting the first and second driving powers to the milling drum with a belt drive system; and (d) setting a crankshaft angle of the first engine relative to a crankshaft angle of the second engine and thereby at least partially cancelling rotary oscillations produced by the first engine with rotary oscillations produced by the second engine.