Energy recovery apparatus for turbo compound engine

• US 4,798,257 A
• Filed: 10/17/1986
• Issued: 01/17/1989
• Est. Priority Date: 10/19/1985
• Status: Expired due to Term

• Current Assignee: Isuzu Motors Limited
• Original Assignee: Isuzu Motors Limited
• Inventors: Tamai, Katsuyuki, Kawamura, Hideo
• Primary Examiner(s): Mitchell, David M.
• Assistant Examiner(s): CAMBY, RICHARD M
• Application Number:
  US06/920,133
• Time in Patent Office: 823 Days
• Field of Search: 180/65.2, 180/65.3, 180/2.1, 180/165, 180/65.4, 60/597, 60/608
• US Class Current: 180/165
• CPC Class Codes: B60K 6/22 characterised by apparatus, components or means specially adapted for HEVs
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: F01N 5/04 the devices using kinetic energy
• CPC Class Codes: F02B 37/005 Exhaust driven pumps being combined with an exhaust driven auxiliary apparatus, e.g. a ventilator
• 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 37/10 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 Class Codes: F02B 37/14 Control of the alternation between or the operation of exhaust drive and other drive of a pump, e.g. dependent on speed
• CPC Class Codes: F02B 39/10 electric
• CPC Class Codes: F02B 41/10 in exhaust turbines use of exhaust turbines for charging F02B37/00
• CPC Class Codes: F02D 41/0007 for control of turbo-charged or super-charged engines control of the pumps per se F02B37/12
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/904 Component specially adapted for hev

Abstract

An energy recovery apparatus for a turbo compound engine is provided having an exhaust turbine with a first rotary machine in an exhaust pipe of an internal combustion engine; a second rotary machine mounted on a wheel axle of a motor vehicle which is driven by the internal combustion engine, and an exhaust turbine coupled to the exhaust port of the first-mentioned exhaust turbine; and a third rotary machine operable as a generator. The energy recovery apparatus also includes a first sensor for detecting the speed of rotation of the internal combustion engine and a second sensor for detecting the load on the engine. The first through third rotary machines are controlled by signals from the sensors and efficiently utilize the exhaust energy carried by the exhaust gas discharged from the internal combustion engine.

Claims

1. An energy recovery apparatus in a turbo compound engine having a turbocharger operable by exhaust gases emitted from an internal combustion engine mounted on a vehicle, said energy recovery apparatus comprising:

(a) a first rotary machine disposed in said turbocharger;

(b) a second rotary machine disposed on a wheel axle driven by said engine;

(c) a third rotary machine disposed in an exhaust turbine disposed in an exhaust pipe of said internal combustion engine, and operable as a generator for converting exhaust energy from the internal combustion engine to electric energy for energy recovery;

(d) means for detecting the speed of rotation of said engine;

(e) means for detecting the load on said engine;

(f) means for operating said first rotary machine as a generator while said engine is idling; and

(g) means for charging a battery with electric power generated by said first rotary machine.

2. An energy recovery apparatus in a turbo compound engine having a turbocharger operable by exhaust gases emitted from an internal comustion engine mounted on a vehicle said energy recovery apparatus comprising:

(a) a first rotary machine disposed in said turbocharger;

(b) a second rotary machine disposed on a wheel axle driven by said engine;

(c) a third rotary machine disposed in an exhaust turbine disposed in an exhaust pipe of said internal combustion engine, and operable as a generator for converting exhaust energy from the internal combustion engine to electric energy for energy recovery;

(d) means for detecting the speed of rotation of said engine;

(e) means for detecting the load on said engine;

(f) means for operating said first rotary machine and said third rotary machine as generators when the speed of rotation of said engine is higher than a predetermined speed; and

(g) means for operating said second rotary machine as a motor with electric power generated by said first rotary machine and said third rotary machine.

3. An energy recovery apparatus in a turbo compound engine having a turbocharger operable by exhaust gases emitted from an internal combustion engine mounted on a vehicle, said energy recovery apparatus comprising:

(a) a first rotary machine disposed in said turbocharger;

(b) a second rotary machine disposed on a wheel axle driven by said engine;

(c) a third rotary machine disposed in an exhaust turbine disposed in an exhaust pipe of said internal combustion engine, and operable as a generator for converting exhaust energy from the internal combustion engine to electric energy for energy recovery;

(d) means for detecting the speed of rotation of said engine;

(e) means for detecting the load on said engine;

(f) means for operating said first rotary machine and said third rotary machine as generators when the speed of rotation of said engine is lower than a predetermined speed ad the load on said engine is small; and

(g) means for operating said second rotary machine as a motor with electric power generated by said first rotary machine and said third rotary machine.

4. An energy recovery apparatus in a turbo compound engine having a turbocharger operable by exhaust gases emitted from an internal combustion engine mounted on a vehicle, said energy recovery apparatus comprising:

(a) a first rotary machine disposed in said turbocharger;

(b) a second rotary machine disposed on a wheel axle driven by said engine;

(c) a third rotary machine disposed in an exhaust turbine disposed on an exhaust pipe of said internal combustion engine, and operable as a generator for converting exhaust energy from the internal combustion engine to electric energy for energy recovery;

(d) means for detecting the speed of rotation of said engine;

(e) means for detecting the load on said engine;

(f) means for operating said first rotary machine as a motor with electric power from a battery and for operating said third rotary machine as a generator when the speed of rotation of said engine is lower than a predetermined speed and the load on said engine is large; and

(g) means for operating said second rotary machine as a motor with electric power generated by said first rotary machine and said third rotary machine.

5. An energy recovery apparatus in a turbo compound engine having a turbocharger operable by exhaust gases emitted from an internal combustion engine mounted on a vehicle, said energy recovery apparatus comprising:

(a) a first rotary machine disposed in said turbocharger;

(b) a second rotary machine disposed on a wheel axle driven by said engine;

(c) a third rotary machine disposed in an exhaust turbine disposed in an exhaust pipe of said internal combustion engine, and operable as a generator for converting exhaust energy from the internal combustion engine to electric energy for energy recovery;

(d) means for detecting the speed of rotation of said engine;

(e) means for detecting the load on said engine;

(f) means for operating said third rotary machine as a generator when the speed of rotation of said engine is lower than a predetermined speed and the load on said engine is medium; and

(g) means for operating said second rotary machine as a motor with electric power generated by said third rotary machine.

6. An energy recovery apparatus in a turbo compound engine having a turbocharger operable by exhaust gases emitted from an internal combustion engine mounted on a vehicle, said energy recovery apparatus comprising:

(a) a first rotary machine disposed in said turbocharger;

(b) a second rotary machine disposed on a wheel axle driven by said engine;

(c) a third rotary machine disposed in an exhaust turbine disposed in an exhaust pipe of said internal combustion engine, and operable as a generator for converting exhaust energy from the internal combustion engine to electric energy for energy recovery;

(d) means for detecting the speed of rotation of said engine;

(e) means for detecting the load on said engine;

(f) means for operating said first rotary machine, said second rotary machine, and said third rotary machine as generators when the speed of rotation of said engine is lower than a predetermined speed and the load on said engine is nil; and

(g) means for charging a battery with electric power generated by said first rotary machine, said second rotary machine, and said third rotary machine.