Patent ID: 9722473
Date: 2017-08-01
CPC Classifications: E01C,E02F,H02K

Claim:
1. Road paving machine having an electric generator and further comprising a hydraulic oil system for hydraulic functions and for cooling the electric generator, the generator having a coil shape pipe system on an outer surface that is connected to the hydraulic oil system, a pressure-generating oil pump in the hydraulic oil system configured to interact with the hydraulic oil system, wherein the oil pump conveys hydraulic oil via the hydraulic oil system through the coil shape pipe system of the generator, the generator is driven by a combustion engine and at least one pressure limiter is provided in the coil shape pipe system, the combustion engine being functionally connected to an auxiliary drive which is provided for driving the generator and the oil pump, and the coil-shaped pipe system of the generator being connected to a pre-heating circuit in order to rapidly heat the generator to an operating temperature in the event of cold external temperatures.