Internal combustion engine with an exhaust gas turbocharger

• US 4,453,381 A
• Filed: 01/06/1982
• Issued: 06/12/1984
• Est. Priority Date: 01/13/1981
• Status: Expired due to Fees

• Current Assignee: Motoren- und Turbinen-Union Friedrichshafen GmbH
• Original Assignee: MTU Motoren- und Turbinen-Union Friedrichshafen GmbH
• Inventors: Dinger, Hans
• Primary Examiner(s): Hart, Douglas
• Application Number:
  US06/337,370
• Time in Patent Office: 888 Days
• Field of Search: 60/609, 60/610, 60/612, 123/564, 123/565
• US Class Current: 60/612
• CPC Class Codes: F02B 33/34 with rotary pumps with cell-type pressure exchangers or the like F02B33/42
• CPC Class Codes: F02B 37/04 Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
• CPC Class Codes: F02B 39/10 electric
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

In the operation of supercharged internal combustion engines, certain operating conditions exist during which the exhaust gas turbochargers cannot supply adequate supercharging air for the internal combustion engine due to a low production of exhaust gas by the engine. To eliminate this problem, an auxiliary compressor with a flywheel is proposed, which is constantly driven by an auxiliary drive mechanism and whose power input can be considerably reduced by closing its air conduit. In case of lacking charging air, the auxiliary compressor is used in a simple way, by opening the closure devices on its air side, in order to enable a supply of supercharging air to the internal combustion engine. The power required for driving the auxiliary compressor is derived primarily from energy stored in the revolving flywheel mass as well as from the power of the auxiliary drive mechanism.

Claims

1. An internal combustion engine comprising exhaust gas turbocharger means including charging air compressor means driven by exhaust gas turbine means, air lines for said compressor means which include automatic valve means operable to enable an air flow only from the compressor means in the direction toward the internal combustion engine, at least one auxiliary compressor means driven by an auxiliary drive means, said auxiliary compressor means being operable to take over the supply of the internal combustion engine with charging air in case of inadequate exhaust gas energy of the internal combustion engine, characterized in that the auxiliary compressor means is securely connected with an additional flywheel means, is driven continuously by the auxiliary drive means during operation of the internal combustion engine, is operable to be closed off on its air-side by a closure means for reducing the driving power thereof and is operable to be engaged in case of need to supply charging air to the internal combustion engine by opening said closure means.

2. An internal combustion engine with a charging air line according to claim 1, characterized in that the charging air supplied by the auxiliary compressor means is fed to the charging air line on the pressure side of the exhaust gas turbocharger means.

3. An internal combustion engine with a suction line for the exhaust gas turbocharger means according to claim 1, characterized in that the air supplied by the auxiliary compressor means is fed into said suction line.