Motor vehicle with reduced sound emissions

摘要

A heavy goods vehicle or omnibus motor vehicle with reduced sound emissions, having a diesel engine, the operation of which can be regulated by an injection pump by an engine electronics unit which includes a microprocessor, a data and program store and input and output peripherals. Measures for at least temporarily reducing the sound emissions by the engine can be carded out to and/or at a level preferably prescribed by legislation, by regulating operation of the engine such that free and/or additional data storage locations that need to be provided in the engine electronics unit switch to a reduced-noise mode, the effect of which at least temporarily increases consumption and at the same time is at least approximately constant in terms of power and rotation speed, and which reduces the emission of sound from the drive and/or engine, in particular the reduced-noise mode lowers the rail pressure, defers the injection to a later time and/or provides a greater volume of subsets in the fuel metering.

主权项

1. A motor vehicle with reduced sound emissions, comprising:
an engine and a drive; an injection pump; and an engine electronics unit which comprises a microprocessor, a data and program store and input and output peripherals, wherein a regulation of an operation of the engine is performed by the injection pump and by the engine electronics unit, and the engine electronics unit being switchable between a normal mode and a reduced noise mode, wherein free or additional data store areas are used by the engine electronics unit in the reduced-noise mode in which at least one of a rail pressure is lowered, injection is deferred to a later time, and a greater volume of subsets is provided in fuel metering, compared to the normal mode, the effect of which at least temporarily increases consumption while at the same time maintains at least approximately constant power and rotation speed, and reduces the emission of sound from the drive and/or engine in the reduced-noise mode, wherein the engine electronics unit carries out a first degree of sound reduction during the reduced-noise mode if the vehicle is in a first surface section and carries out a second degree of sound reduction during the reduced-noise mode if the motor vehicle is in a second surface section, the first and second degrees of sound reduction being different and having at least a delta of 3 dB sound pressure at the chosen measurement interval.