GB2405178A - Engine fuel economy system with cylinder deactivation - Google Patents

Engine fuel economy system with cylinder deactivation Download PDF

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Publication number
GB2405178A
GB2405178A GB0319336A GB0319336A GB2405178A GB 2405178 A GB2405178 A GB 2405178A GB 0319336 A GB0319336 A GB 0319336A GB 0319336 A GB0319336 A GB 0319336A GB 2405178 A GB2405178 A GB 2405178A
Authority
GB
United Kingdom
Prior art keywords
cylinders
activated
fuel economy
pressure relief
ecu
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.)
Withdrawn
Application number
GB0319336A
Other versions
GB0319336D0 (en
Inventor
Gordon Joseph Snadden Wilson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0319336A priority Critical patent/GB2405178A/en
Publication of GB0319336D0 publication Critical patent/GB0319336D0/en
Publication of GB2405178A publication Critical patent/GB2405178A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/06—Cutting-out cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/02—Cutting-out
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • F02D2041/0012—Controlling intake air for engines with variable valve actuation with selective deactivation of cylinders
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

A method of operating an internal combustion engine involves reducing the activation of a number of fuel consuming cylinders to only those which are actually required in practice. Pressure relief valves 4 in the cylinder head 2 are added to one or more cylinders so that during operation in deactivated mode, compressed air from these cylinders is allowed to escape via the pressure relief valves 4, while the inlet and exhaust valves remain closed and fuel supply to these cylinders is suspended. This compressed air may then be used to provide supercharging to the remaining active cylinders. Activation of the pressure relief valves 4 is controlled by an electronic control unit 7.

Description

Page 1
DESCRIPTION
Engine Fuel Economy System The invention relates to an improvement in Engine Management, Ecological Control, and Fuel Economy, within traditional Internal Combustion Engines.
Specifically, the invention relates to a method and system of progressive cylinder de-activation within Internal Combustion Engines.
Present ecological requirements in the automotive markets and general internal combustion engine industries, have led to an increasing requirement to improve fuel economy, and reduce emissions, in vehicles and other assemblies utilising internal combustion engines.
The ecological priorities require to be balanced with an awareness of consumer preferences, and their choice of superior performance, versus fuel economy, and ecological awareness.
However Internal Combustion Engines can be provided with improved fuel economy, ecological sensitivity, and little loss on optimum performance by operating a progressive cylinder de-activation system.
Dunng normal operating cycles each cylinder is supplied with fuel, air, and spark, in the case of petrol/gasoline engines to provide power, with no spark required in the case of diesel fuelled or similar engines During operating cycles at low load, insignificant load, idling, in traffic congestion, or where the engine is in a "cruise state", and an optimum load has been identified, cylinders may be deactivated and fuel cut off from a designated number of cylinders to improve fuel economy, decrease emissions, and then subsequently reactivated, as deemed necessary, and instructed by an ECU. (electronic control unit) The cylinders that are deactivated would normally inhibit return air flow through their intake and exhaust valves (3). during their compression cycle, as they are designed to remain closed during that cycle.
In order to overcome this problem, additional pressure relief valves (4). which are activated by a central ECU,(7) are introduced to each pertinent cylinder head,(2) and are instructed by the ECU,(7) to open at the same point in time that fuel is cut off to that cylinder.
Engine operation is modified to enable free unpressurized movement of the de-activated piston/s (8) within their "previous" compression cycle.
In the case of mechanically or hydraulically operated intake and exhaust valved engines, a solenoid or other system of controlling device would operate the relief valves(4) located in each cylinder head (2)chamber, and would be activated by the ECU (7) in sequenced timing to ensure that unpressured movement of the pistons (8)could occur in those cylinders which the ECU (7) had determined to suspend fuel supply.
Depending upon engine load, a number of cylinders could be de-activated by the ECU (7)as it deemed appropriate, thereby achieving a progressive deactivation of cylinders.
Furthermore, the de-activated cylinders would generate a positive air pressure upon their "compression" stroke, which could be redirected to create a form of "turbo-charging" to the remaining active cylinders.

Claims (1)

  1. PAGE 1
    Enaine Fuel Economy System De-activated cylinders in an internal combustion engine would normally inhibit induced return air flow through intake and exhaust valves,in their compression cycle, and the pressure build up within those cylinders requires to be either overcome or negated, therefor an active pressure relief valve(4) is introduced to each pertinent cylinder within the cylinder head,(2) and the engine operation is modified to enable free unpressurized movement of de-activated piston/s (8) within their "previous" compression cycle, In the case of mechanically or hydraulically operated intake and exhaust valved engines, a solenoid or other controlled device would operate the relief valves located in each cylinder head chamber, and would be activated by the ECU (7) in sequenced timing to ensure that depressurisation could occur in those cylinders which the ECU (7) had determined to suspend fuel supply,
GB0319336A 2003-08-16 2003-08-16 Engine fuel economy system with cylinder deactivation Withdrawn GB2405178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0319336A GB2405178A (en) 2003-08-16 2003-08-16 Engine fuel economy system with cylinder deactivation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0319336A GB2405178A (en) 2003-08-16 2003-08-16 Engine fuel economy system with cylinder deactivation

Publications (2)

Publication Number Publication Date
GB0319336D0 GB0319336D0 (en) 2003-09-17
GB2405178A true GB2405178A (en) 2005-02-23

Family

ID=28052670

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0319336A Withdrawn GB2405178A (en) 2003-08-16 2003-08-16 Engine fuel economy system with cylinder deactivation

Country Status (1)

Country Link
GB (1) GB2405178A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2705715C2 (en) * 2018-04-05 2019-11-11 Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) Ship diesel engine with system to ensure its operation at idling and low loads modes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492192A (en) * 1983-07-29 1985-01-08 Renault Vehicules Industriels Diesel piston engine
EP0134373A1 (en) * 1983-07-20 1985-03-20 RENAULT VEHICULES INDUSTRIELS Société dite: Diesel engine provided with a device for the controlled operation of one piston as an air compressor
US4671226A (en) * 1978-11-02 1987-06-09 Mtu-Friedrichshafen Gmbh Supercharged multi-cylinder four-cycle diesel engine
DE4115008A1 (en) * 1991-05-08 1992-11-12 Opel Adam Ag Valve drive for D.O.H.C. IC engine - has switch for selective disengagement of camshaft
US5315974A (en) * 1990-11-23 1994-05-31 Ab Volvo Internal combustion engine with compressor function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671226A (en) * 1978-11-02 1987-06-09 Mtu-Friedrichshafen Gmbh Supercharged multi-cylinder four-cycle diesel engine
EP0134373A1 (en) * 1983-07-20 1985-03-20 RENAULT VEHICULES INDUSTRIELS Société dite: Diesel engine provided with a device for the controlled operation of one piston as an air compressor
US4492192A (en) * 1983-07-29 1985-01-08 Renault Vehicules Industriels Diesel piston engine
US5315974A (en) * 1990-11-23 1994-05-31 Ab Volvo Internal combustion engine with compressor function
DE4115008A1 (en) * 1991-05-08 1992-11-12 Opel Adam Ag Valve drive for D.O.H.C. IC engine - has switch for selective disengagement of camshaft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2705715C2 (en) * 2018-04-05 2019-11-11 Российская Федерация, от имени которой выступает Министерство промышленности и торговли Российской Федерации (Минпромторг России) Ship diesel engine with system to ensure its operation at idling and low loads modes

Also Published As

Publication number Publication date
GB0319336D0 (en) 2003-09-17

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)