GB2106590A - I.C. engine with inertia and displacement pump supercharging - Google Patents

I.C. engine with inertia and displacement pump supercharging Download PDF

Info

Publication number
GB2106590A
GB2106590A GB08223576A GB8223576A GB2106590A GB 2106590 A GB2106590 A GB 2106590A GB 08223576 A GB08223576 A GB 08223576A GB 8223576 A GB8223576 A GB 8223576A GB 2106590 A GB2106590 A GB 2106590A
Authority
GB
United Kingdom
Prior art keywords
engine
supercharger
inertia
displacement
supercharged
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08223576A
Other versions
GB2106590B (en
Inventor
Tamotsu Kasuya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsu Ltd filed Critical Komatsu Ltd
Publication of GB2106590A publication Critical patent/GB2106590A/en
Application granted granted Critical
Publication of GB2106590B publication Critical patent/GB2106590B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/003—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues using check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
    • F02B33/446—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs having valves for admission of atmospheric air to engine, e.g. at starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/12—Drives characterised by use of couplings or clutches therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • F02M35/10163—Supercharged engines having air intakes specially adapted to selectively deliver naturally aspirated fluid or supercharged fluid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Supercharger (AREA)

Abstract

Internal combustion 10 has inertia supercharger 12 comprising a damping volume 14 connected through pipes 16 to air intake ports (not shown). Pipe 18 connects volume 14 to atmosphere, and has chamber 20 thereon containing displacement supercharger 22 driven by engine crankshaft 24. In a modification there is provided clutch 32 for cutting out the displacement supercharger at a preset engine speed. <IMAGE>

Description

SPECIFICATION Superchargers for engines The invention relates to superchargers for internal combustion or diesel engines.
According to the invention, an inertia superchar ger is in combination with a displacement super charger driven by an engine crankshaft. Engine characteristics at low speeds range are thus signifi cantly improved.
Inertia superchargers connect air intake ports of the engine to an air intake manifold, and the dynamic effect or inertia of the air supplied through the manifold increases the amount of the air sup plied into the cylinders. The length of the manifold may depend on such factors as cylinder volume, the timing of the actuation of the air intake and exhaust valves, the sectional area of the manifold and the number of revolutions of the engine to be tuned with the operation of the supercharger.
Inertia supercharged engines have better volumetric efficiency and torque performance than non-supercharged engines, but only at high engine speeds. There is little or no improvement at low speeds.
Since the displacement supercharger is mechani cally connected to the crankshaft, air is super charged even at very low engine speeds and im proves the starting characteristics of the engine.
Figure 1 is a schematic view of a supercharger according to the invention; Figure 2 is similar to Figure 1 but shows another embodiment of the invention; and Figure 3 is a graph showing performance curves of engines: the dot and dash line represents a non supercharged engine, the solid line an inertia super charged engine, and the broken line an inertia and displacement supercharged engine according to the invention.
Referring to Figure 1,an engine 10 has an inertia supercharger 12 comprising a damping volume 14 or surge tank and a number of pipes 16 each connecting the damping volume 14 with air intake ports (not shown) to the engine 10. The combination ,of the damping volume 14 and pipes 16 accelerates airfrom the damping volume 14 through the pipes 16, and so the engine 10 is supercharged by the inertia of the accelerated air.
A pipe 18 connects the damping volume 14to atmosphere. On the pipe 18 is a chamber 20 accommodating a displacement supercharger 22 in the form of a vane compressor. The displacement supercharger 22 is connected to and driven by a crankshaft 24 of the engine through a transmission 26 comprising a pulley-V belt drive. In the chamber 20 is a partition block 28 dividing the upper half of the chamber 20 into two sections. A partition wall 30 divides the pipe 18 in two. As the displacement supercharger 22 is directly rotated by the crankshaft 24, air is forced into the damping volume 14 even at very low engine speeds. The combination of the displacement supercharger 22 and the inertia super charger 12 supplies enough airtothe engine cylin ders at any engine speed to improve engine charac teristics as shown by the broken line in Figure 3.
In Figure 2 an electromagnetic clutch 32 is pro vided in the transmission 26 and normally held engaged. The clutch 32 is disengaged when the engine speed exceeds a present value of about 1,400 rpm. A detector 34 for the number of revolutions of thus engine 10 generates a signal when the speed exceeds the preset value. The signal from the detector 34 is fed to a controller 36 which disengages the clutch 32. A check valve 38 is provided in the pipe 18, and allows airfromthe atmosphere to flow only to the damping volume 14. After the displacement supercharger 22stops rotation, air is mainly introduced through the check valve 38.As the displacement supercharger 22 is disconnected from the crankshaft 24, when the engine speed exceeds the preset value, energy for driving the displacement supercharger 22 is saved and can be utilized for other purposes.
Figure 3 shows that the engine characteristics of the displacement and inertia supercharged engine of the invention are superior to those of an inertia supercharged engine and of a non-supercharged engine, especiaily in the low engine speed range.
1. Asuperchargerforan internal combustion or diesel engine comprising an inertia supercharger in combination with a displacement supercharger driven an engine crankshaft.
2. A supercharger according to claim 1 comprising a chamber for accommodating the displacement supercharger in a pipe connecting a damping volume of the inertia supercharger to atmosphere.
3. A supercharger according to claim 1 or claim 2 comprising a checkvalve for allowing only air admission from the atmosphere.
4. A supercharger according to any preceding claim comprising a detector for generating a signal when engine speed exceeds a preset value, a clutch connecting the crankshaft to the displacement supercharger, and means responsive to the signal for disengaging the clutch.
5. A supercharger as herein described with referpence to Figure 1 of the drawings.
6. A supercharger as herein described with reference to Figure 2 of the drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Superchargers for engines The invention relates to superchargers for internal combustion or diesel engines. According to the invention, an inertia superchar ger is in combination with a displacement super charger driven by an engine crankshaft. Engine characteristics at low speeds range are thus signifi cantly improved. Inertia superchargers connect air intake ports of the engine to an air intake manifold, and the dynamic effect or inertia of the air supplied through the manifold increases the amount of the air sup plied into the cylinders. The length of the manifold may depend on such factors as cylinder volume, the timing of the actuation of the air intake and exhaust valves, the sectional area of the manifold and the number of revolutions of the engine to be tuned with the operation of the supercharger. Inertia supercharged engines have better volumetric efficiency and torque performance than non-supercharged engines, but only at high engine speeds. There is little or no improvement at low speeds. Since the displacement supercharger is mechani cally connected to the crankshaft, air is super charged even at very low engine speeds and im proves the starting characteristics of the engine. Figure 1 is a schematic view of a supercharger according to the invention; Figure 2 is similar to Figure 1 but shows another embodiment of the invention; and Figure 3 is a graph showing performance curves of engines: the dot and dash line represents a non supercharged engine, the solid line an inertia super charged engine, and the broken line an inertia and displacement supercharged engine according to the invention. Referring to Figure 1,an engine 10 has an inertia supercharger 12 comprising a damping volume 14 or surge tank and a number of pipes 16 each connecting the damping volume 14 with air intake ports (not shown) to the engine 10. The combination ,of the damping volume 14 and pipes 16 accelerates airfrom the damping volume 14 through the pipes 16, and so the engine 10 is supercharged by the inertia of the accelerated air. A pipe 18 connects the damping volume 14to atmosphere. On the pipe 18 is a chamber 20 accommodating a displacement supercharger 22 in the form of a vane compressor. The displacement supercharger 22 is connected to and driven by a crankshaft 24 of the engine through a transmission 26 comprising a pulley-V belt drive. In the chamber 20 is a partition block 28 dividing the upper half of the chamber 20 into two sections. A partition wall 30 divides the pipe 18 in two. As the displacement supercharger 22 is directly rotated by the crankshaft 24, air is forced into the damping volume 14 even at very low engine speeds. The combination of the displacement supercharger 22 and the inertia super charger 12 supplies enough airtothe engine cylin ders at any engine speed to improve engine charac teristics as shown by the broken line in Figure 3. In Figure 2 an electromagnetic clutch 32 is pro vided in the transmission 26 and normally held engaged. The clutch 32 is disengaged when the engine speed exceeds a present value of about 1,400 rpm. A detector 34 for the number of revolutions of thus engine 10 generates a signal when the speed exceeds the preset value. The signal from the detector 34 is fed to a controller 36 which disengages the clutch 32. A check valve 38 is provided in the pipe 18, and allows airfromthe atmosphere to flow only to the damping volume 14. After the displacement supercharger 22stops rotation, air is mainly introduced through the check valve 38.As the displacement supercharger 22 is disconnected from the crankshaft 24, when the engine speed exceeds the preset value, energy for driving the displacement supercharger 22 is saved and can be utilized for other purposes. Figure 3 shows that the engine characteristics of the displacement and inertia supercharged engine of the invention are superior to those of an inertia supercharged engine and of a non-supercharged engine, especiaily in the low engine speed range. CLAIMS
1. Asuperchargerforan internal combustion or diesel engine comprising an inertia supercharger in combination with a displacement supercharger driven an engine crankshaft.
2. A supercharger according to claim 1 comprising a chamber for accommodating the displacement supercharger in a pipe connecting a damping volume of the inertia supercharger to atmosphere.
3. A supercharger according to claim 1 or claim 2 comprising a checkvalve for allowing only air admission from the atmosphere.
4. A supercharger according to any preceding claim comprising a detector for generating a signal when engine speed exceeds a preset value, a clutch connecting the crankshaft to the displacement supercharger, and means responsive to the signal for disengaging the clutch.
5. A supercharger as herein described with referpence to Figure 1 of the drawings.
6. A supercharger as herein described with reference to Figure 2 of the drawings.
GB08223576A 1981-08-21 1982-08-17 Ic engine with inertia and displacement pump supercharging Expired GB2106590B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1981122937U JPS5829122U (en) 1981-08-21 1981-08-21 Internal combustion engine supercharging device

Publications (2)

Publication Number Publication Date
GB2106590A true GB2106590A (en) 1983-04-13
GB2106590B GB2106590B (en) 1985-03-27

Family

ID=14848295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08223576A Expired GB2106590B (en) 1981-08-21 1982-08-17 Ic engine with inertia and displacement pump supercharging

Country Status (3)

Country Link
JP (1) JPS5829122U (en)
DE (1) DE3230598A1 (en)
GB (1) GB2106590B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309184C2 (en) * 1983-03-15 1986-04-24 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg 4-stroke internal combustion engine charged by means of an exhaust gas turbocharger

Also Published As

Publication number Publication date
DE3230598A1 (en) 1983-03-10
JPS5829122U (en) 1983-02-25
GB2106590B (en) 1985-03-27

Similar Documents

Publication Publication Date Title
US6029452A (en) Charge air systems for four-cycle internal combustion engines
US6408832B1 (en) Outboard motor with a charge air cooler
EP2347108B1 (en) An exhaust arrangement for an internal combustion engine
US4505117A (en) Turbocharged internal combustion engine having an engine driven positive displacement compressor
US20060168958A1 (en) Supercharged internal combustion engine
JPH10238354A (en) Hybrid supercharged engine
US6141965A (en) Charge air systems for four-cycle internal combustion engines
US4428192A (en) Turbocharged internal combustion engine
JPH09505654A (en) Method for improving the operation of an air scavenging heat engine and heat engine implementing this method
WO1997018388A1 (en) Charge air systems for four-cycle internal combustion engines
US4638637A (en) Vehicle propulsion plant
JP2004068816A (en) Supercharging type internal combustion engine
WO1999006682A2 (en) Supercharged internal combustion compound engine
GB2143580A (en) Supercharging arrangement for multi-cylinder internal combustion engine
US6189318B1 (en) Internal combustion engines
GB2106590A (en) I.C. engine with inertia and displacement pump supercharging
GB1480247A (en) Combination engine and air compressor
JPH0457848B2 (en)
US11008933B2 (en) Four stroke internal combustion engine
GB2125892A (en) Turbo-supercharging and resonance charging an I.C. engine
US3487634A (en) Constant horsepower internal combustion engines
JPS6019938Y2 (en) turbo compound engine
GB2118621A (en) Two stage i.c. engine supercharging
JPH0125883B2 (en)
US4471615A (en) Turbo and inertia supercharger

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee