Exhaust gas turbocharger for an internal combustion engine having a fresh gas supply device and a corresponding arrangement

Patent metadata

Field	Value
Publication number	US-9238997-B2
Application number	US-201213532433-A
Country	US
Kind code	B2
Filing date	Jun 25, 2012
Priority date	Dec 23, 2009
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

An exhaust gas turbocharger for an internal combustion machine, in particular a diesel engine, having an unburnt mixture supply device, includes at least one compressor; at least one exhaust gas turbine; a turbocharger shaft by which the compressor and the exhaust gas turbine are rotationally fixedly coupled; and an energy store for increasing a mass moment of inertia. The energy store is rotationally fixedly coupled to the at least one compressor and the at least one exhaust gas turbine by the turbocharger shaft. An arrangement for supplying unburnt gas to an internal combustion machine includes such an exhaust gas turbocharger and an unburnt gas supply device.

First claim

What is claimed is:

1. An exhaust gas turbocharger-equipped internal combustion engine, comprising:
an engine having an intake and an exhaust and being configured to drive a vehicle transmission;
a fresh gas supply device configured to introduce stored compressed fresh gas from a storage tank into the engine intake; and
an exhaust gas turbocharger arranged to receive exhaust gas from the engine exhaust and deliver fresh gas from the atmosphere to the engine intake,
wherein
the fresh gas supply device is configured to introduce the stored compressed fresh gas into the engine intake between the exhaust gas turbocharger and the engine such that additional exhaust gas flow is generated to increase a rotation speed of the exhaust gas turbocharger to eliminate turbo lag due to at least one of starting the internal combustion engine from idling speed and accelerating the internal combustion engine from a low speed without a shift operation, and
the exhaust gas turbocharger includes
at least one compressor,
at least one exhaust gas turbine,
a turbocharger shaft, by which the at least one compressor and the at least one exhaust gas turbine are coupled for conjoint rotation,
a rotational energy storage device having a mass moment of inertia, the rotational energy storage device being integral with or non-disengageably connected to at least one of the turbocharger shaft, the at least one compressor and the at least one exhaust gas turbine for conjoint rotation to increase a mass moment of inertia of the combined turbocharger shaft, turbine and compressor, wherein
the mass moment of inertia of the rotational energy storage device is selected to obtain a predetermined turbocharger deceleration rate during shifting of the transmission, and
the predetermined deceleration rate is selected such that the turbocharger speed before the transmission shift decreases during the transmission shift to a speed after the transmission shift that does not need to be increased to provide positive pressure in the engine intake downstream of the turbocharger compressor.

2. The exhaust gas turbocharger as claimed in claim 1 , wherein a rotating mass of the energy storage device is integrated at least partially into the turbocharger shaft.

3. The exhaust gas turbocharger as claimed in claim 2 , wherein the exhaust gas turbocharger is for a diesel engine.

4. The exhaust gas turbocharger as claimed in claim 1 , wherein a rotating mass of the energy storage device is integrated at least partially into rotating parts of at least one of the at least one compressor and the at least one exhaust gas turbine.

5. The exhaust gas turbocharger as claimed in claim 4 , wherein the exhaust gas turbocharger is for a diesel engine.

6. The exhaust gas turbocharger as claimed in claim 1 , wherein the exhaust gas turbocharger is for a diesel engine.

Assignees

• Gerum Eduard
• Marx Manuel
• Knorr Bremse Systeme

Inventors

• Gerum Eduard
• Marx Manuel

Classifications

• F02B37/10 Primary

  at least one pump being alternatively {or simultaneously} driven by exhaust and other drive, {e.g. by pressurised fluid from a reservoir or an engine-driven pump} · CPC title

• Y02T10/144

  Cross-Sectional Technologies · mapped topic

• F02B37/14

  {Control} of the alternation between {or the operation of} exhaust drive and other drive of a pump, e.g. dependent on speed · CPC title

• F02B39/00

  Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title