Device and method for dispensing a friction-coefficient-optimizing mixture

A method for dispensing a mixture of at least one lubricant and at least one grit into a gap between a rail wheel of a rail vehicle and a rail, the method comprising:

• delivering the at least one lubricant out of at least one lubricant reservoir via at least one lubricant metering unit and a lubricant delivery line that ends in a common dispensing nozzle;
• delivering the at least one grit out of at least one grit reservoir via at least one grit metering unit and at least one grit delivery line that ends in the common dispensing nozzle;
• and
• dispensing the at least one lubricant and the at least one grit from the lubricant delivery line and the at least one grit delivery line that end in the common dispensing nozzle into the gap between the rail wheel and the rail such that demixing of the at least one lubricant and the at least one grit is prevented,
• wherein the at least one lubricant and the at least one grit are metered and delivered to the common dispensing nozzle separately from each other.

A mixture dispensing device, comprising:

• a common nozzle configured to direct a lubricant and a grit into a gap between a wheel of a vehicle and a rail;
• a lubricant line that ends in the common nozzle;
• a grit line that ends in the common nozzle;
• a lubricant metering device configured to meter and direct the lubricant from a lubricant reservoir to the common nozzle via the lubricant line separate from the grit;
• and
• a grit metering device configured to meter and direct the grit from a grit reservoir to the common nozzle via the grit line separate from the lubricant, wherein the lubricant line and the grit line end in the common nozzle to prevent demixing of a mixture of the lubricant and the grit that is dispensed from the common nozzle.