GB2158152A - Heating i.c. engine PCV valves - Google Patents

Heating i.c. engine PCV valves Download PDF

Info

Publication number
GB2158152A
GB2158152A GB08510806A GB8510806A GB2158152A GB 2158152 A GB2158152 A GB 2158152A GB 08510806 A GB08510806 A GB 08510806A GB 8510806 A GB8510806 A GB 8510806A GB 2158152 A GB2158152 A GB 2158152A
Authority
GB
United Kingdom
Prior art keywords
engine
valve
blow
coolant
control valve
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
GB08510806A
Other versions
GB2158152B (en
GB8510806D0 (en
Inventor
Shoichi Ohtaka
Yukio Kondo
Takashi Iwashita
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of GB8510806D0 publication Critical patent/GB8510806D0/en
Publication of GB2158152A publication Critical patent/GB2158152A/en
Application granted granted Critical
Publication of GB2158152B publication Critical patent/GB2158152B/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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/06—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding lubricant vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/10—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot liquids, e.g. lubricants or cooling water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F01M13/023—Control valves in suction conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/0011—Breather valves
    • F01M2013/0027—Breather valves with a de-icing or defrosting system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0472—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil using heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/002—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/20—SOHC [Single overhead camshaft]
    • 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

Abstract

A blow-by gas flow control valve 10 is provided with a water jacket 11 connected to the cooling system of the engine. <IMAGE>

Description

SPECIFICATION Internal combustion engine with blow-by gas flow control valve This invention relates to internal combustion engines and in particular to such an engine having a blow-by gas control valve.
It is known to provide a control valve in a passage for the flow of blow-by gases from the crankcase to the air intake system of an engine whereby blow-by gases are returned to the air intake system and thence to the combustion chamber under the control of the said valve. However, in cold ambient conditions is is possible for water present in the blow-by gases to freeze in the said control valve and thereby to cause it to stick.
It has been proposed, in Japanese Published Utility Model Specification No.
99045/1981, to counter this problem by providing an electric heater in association with the said control valve, but this involves an increase in power consumption in the engine and also requires careful control of the heater to prevent excessive heating of the control valve, which is both inconvenient and expensive.
According to the present invention there is provided an internal combustion engine having a blow-by gas passage for returning blowby gases to the air intake system of the engine and a blow-by gas flow control valve in said passage, the said control valve being provided with warming means comprising a water jacket connected to the cooling system of the engine for coolant to flow therethrough.
Some embodiments of the invention will now be described by way of example and with reference to the accompanying drawings, in which: Figure 1 is part-sectional view of the relevant parts of an internal combustion engine according to a first embodiment of the invention; Figure 2 is a cross-sectional view of the blow-by gas control valve and associated parts in the embodiment of Fig. 1; and Figures 3 and 4 are cross-sectional views of the control valve and associated parts in two further embodiments.
Referring first to Fig. 1, an internal combustion engine of the overhead camshaft type has a crankcase 1, an air intake manifold 2, a carburettor 3, and an air cleaner 4. A clean air supply passage 5 leads from the air cleaner to the interior of the rocker box 6, from where such air is able to flow into the crankcase 1 via a suitable passage (not shown) in the cylinder block 7. A blow-by gas passage 8 leads from a breather case 9 of the crankcase 1 to the air intake manifold 2 at a point downstream of the carburettor 3, for the return of blow-by gases to the combustion chambers of the engine, and a flow control valve 10 for the blow-by gases is provided in the passage 8 adjacent the breather case 9.
The valve 10 is a PCV ("positive crankcase ventilation") valve and will be referred to as such hereinafter.
The structure described so far is conventional. In operation, suction in the air intake manifold 2 draws clean air from the air cleaner 4 through the rocker box 6 and into the crankcase 1 where it entrains blow-by gases to be conveyed to the air intake. However, the blow-by gases also carry along oil and other contaminants, and if the PCV valve 10 becomes stuck in its closed position, as a result of the freezing of water carried along by the blow-by gases, those gases and the contaminants carried thereby will be forced to flow in the reverse direction up through the rocker box 6 and into the air cleaner, which will thereby quickly become stained and contaminated.
It is therefore important that freezing of the valve 10 should be reliably prevented when the engine is operating, and also that it should quickly be unfrozen if it does freeze when the engine is temporarily shut down, and for this reason a water jacket 11 is provided around the valve and is connected to the cooling system of the engine by pipes 1 2 and 1 3. Pipe 1 2 is connected to a connector pipe 1 4 of the cooling system near to the water pump (not shown), whilst pipe 1 3 connects to a by-pass outlet 1 5 of the cooling system. The relative arrangement of the PCV valve and the water jacket in this first embodiment of the invention will be clear from Fig.
2, it being noted that the water jacket is wholly defined by an enclosure for the coolant so that there is no direct contact between the coolant and the PCV valve 10.
In the embodiment of Figs. 1 and 2, as the coolant in the water jacket does not directly contact the valve 10, warming of the valve is mainly by radiation. In the modification of Fig. 3 the water jacket 1 7 includes a housing defining only the external wall of a coolant enclosure surrounding the control valve 10, so that the coolant flows in direct contact with the valve, and pipes 1 8 and 1 9 connected to the engine cooling system are connected to opposite side walls of the water jacket. In this embodiment warming of the valve 10 is mainly by conduction from the coolant in the water jacket.
In the modification of Fig. 4 a water jacket 20 for the valve 10 is formed integrally with two conduits 21 and 22 of the air intake system and the valve is screw-threadedly mounted in a threaded bore formed centrally of the water jacket structure, which as in the first embodiment wholly defines an enclosure for the coolant so that there is no direct contact between the coolant and the valve.
Pipes 23 and 24 connect the water jacket to the engine cooling system.
In operation, in all of the illustrated embodiments, coolant warmed by heat exchange with the engine flows through the water jacket, to warm the PCV valve 10. This flow is effective both to prevent freezing of the valve when the engine is running in particularly cold ambient conditins, and also to quickly unfreeze the valve upon starting the engine, if the valve has frozen when the engine has been shut down for a time in cold conditions, e.g. overnight. In the latter circumstances the valve will be quickly unfrozen due to accelerated heating of the engine coolant if, as is customary, a temperature-responsive valve is included in the cooling system to stop the coolant from flowing through the radiator until the engine temperature reaches a predetermined level.Furthermore, once the coolant is permitted to flow through the radiator, its temperature is thereby kept below a certain maximum level, and over-heating of the PCV valve 10 is thereby prevented.
It will thus be understood that the invention provides simple and effective means for preventing freezing of a blow-by gas flow control valve, or for quickly unfreezing the same when starting a cold engine, which does not increase the electrical power consumption of the engine and does not require any additional control means for preventing overheating of the valve.
It should be noted that condensation, rather than freezing, of water present in the blow-by gases can also interfere with the proper operation of the blow-by gas flow control valve, and it will of course be appreciated that the warming of the control valve achieved in accordance with the present invention, at least in its preferred embodiments, is quite sufficient to prevent or remove such condensation.
It should be understood that the scope of the invention extends to the provision of warming means for the blow-by gas flow control valve whatever the location of that valve. For example, in an alternative embodiment of the invention the passage 8 of Fig. 1 of the accompanying drawings is connected to the air cleaner, and the passage 5 to the air intake manifold, the blow-by gas control valve then being located in the passage 5.
It is to be clearly understood that there are no particular features of the foregoing specification, or of any claims appended hereto, which are at present regarded as being essential to the performance of the present invention, and that any one or more of such features or combinations thereof may therefore be included in, added to, omitted from or deleted from any of such claims if and when amended during the prosecution of this application or in the filing or prosecution of any divisional application based thereon.

Claims (5)

1. An internal combustion engine having a blow-by gas passage for returning blow-by gases to the air intake system of the engine and a blow-by gas flow control valve in said passage, the said control valve being provided with warming means comprising a water jacket connected to the cooling system of the engine for coolant to flow therethrough.
2. An engine as claimed in claim 1, wherein the said water jacket is wholly defined by a coolant enclosure surrounding the said control valve, so that there is no direct contact between the coolant and the valve.
3. An engine as claimed in claim 1 or 2, wherein the said water jacket is formed integrally with at least one conduit of the said air intake system.
4. An engine as claimed in claim 1, wherein the said water jacket includes a housing defining only the external wall of a coolant enclosure surrounding the control valve, so that the coolant directly contacts the valve.
5. An internal combustion engine as claimed in claim 1, substantially as hereinbefore described with reference to Figs. 1 and 2, or Fig. 3, or Fig. 4, of the accompanying drawings.
GB08510806A 1984-04-27 1985-04-29 Heating i.c. engine pcv valves Expired GB2158152B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984061515U JPS60173612U (en) 1984-04-27 1984-04-27 Blow-by gas control valve device for internal combustion engine

Publications (3)

Publication Number Publication Date
GB8510806D0 GB8510806D0 (en) 1985-06-05
GB2158152A true GB2158152A (en) 1985-11-06
GB2158152B GB2158152B (en) 1987-11-18

Family

ID=13173293

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08510806A Expired GB2158152B (en) 1984-04-27 1985-04-29 Heating i.c. engine pcv valves

Country Status (2)

Country Link
JP (1) JPS60173612U (en)
GB (1) GB2158152B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291358A2 (en) * 1987-05-15 1988-11-17 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
WO1997003285A1 (en) * 1995-07-13 1997-01-30 Filterwerk Mann + Hummel Gmbh Heating arrangement
DE19602194A1 (en) * 1996-01-23 1997-07-24 Deutz Ag Piston IC-engine crankcase breather
WO2006002791A1 (en) * 2004-06-30 2006-01-12 Daimlerchrysler Ag Crankcase ventilation conduit
DE102005023227A1 (en) * 2005-05-20 2006-07-13 Audi Ag Oil separation system has mutually independently operating cascaded separation stages through which the ventilation gas flows arranged on the crankcase housing or the gearbox housing
DE10001489B4 (en) * 2000-01-15 2006-09-07 Daimlerchrysler Ag Internal combustion engine with at least one cylinder
DE10125312B4 (en) * 2000-06-12 2009-04-09 General Motors Corporation, Detroit Integral PCV system
CN102913681A (en) * 2012-09-29 2013-02-06 杜志伟 Rapid electric heating faucet
CN105986884A (en) * 2015-03-18 2016-10-05 株式会社丰田自动织机 Turbocharger
AT517593B1 (en) * 2015-08-04 2017-03-15 MAN Truck & Bus Österreich AG Warming element through which heating fluid can flow for a blowby vent line
CN116255225A (en) * 2023-03-20 2023-06-13 重庆长安汽车股份有限公司 Engine assembly, vehicle and method for reducing engine oil dilution

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4654569B2 (en) * 2003-06-23 2011-03-23 トヨタ自動車株式会社 Fuel cell system and control method thereof
JP6660854B2 (en) * 2016-09-02 2020-03-11 株式会社クボタ Oil separator exterior engine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6038109B2 (en) * 1983-04-18 1985-08-30 和泉鉄工株式会社 Polishing machine for spherical agricultural products

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0291358A3 (en) * 1987-05-15 1989-11-23 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
EP0291358A2 (en) * 1987-05-15 1988-11-17 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
WO1997003285A1 (en) * 1995-07-13 1997-01-30 Filterwerk Mann + Hummel Gmbh Heating arrangement
DE19602194A1 (en) * 1996-01-23 1997-07-24 Deutz Ag Piston IC-engine crankcase breather
DE19602194B4 (en) * 1996-01-23 2005-07-28 Deutz Ag crankcase ventilation
DE10001489B4 (en) * 2000-01-15 2006-09-07 Daimlerchrysler Ag Internal combustion engine with at least one cylinder
DE10125312B4 (en) * 2000-06-12 2009-04-09 General Motors Corporation, Detroit Integral PCV system
WO2006002791A1 (en) * 2004-06-30 2006-01-12 Daimlerchrysler Ag Crankcase ventilation conduit
DE102005023227A1 (en) * 2005-05-20 2006-07-13 Audi Ag Oil separation system has mutually independently operating cascaded separation stages through which the ventilation gas flows arranged on the crankcase housing or the gearbox housing
CN102913681A (en) * 2012-09-29 2013-02-06 杜志伟 Rapid electric heating faucet
CN102913681B (en) * 2012-09-29 2014-06-04 杜志伟 Rapid electric heating faucet
CN105986884A (en) * 2015-03-18 2016-10-05 株式会社丰田自动织机 Turbocharger
AT517593B1 (en) * 2015-08-04 2017-03-15 MAN Truck & Bus Österreich AG Warming element through which heating fluid can flow for a blowby vent line
AT517593A4 (en) * 2015-08-04 2017-03-15 MAN Truck & Bus Österreich AG Warming element through which heating fluid can flow for a blowby vent line
CN116255225A (en) * 2023-03-20 2023-06-13 重庆长安汽车股份有限公司 Engine assembly, vehicle and method for reducing engine oil dilution
CN116255225B (en) * 2023-03-20 2024-04-19 重庆长安汽车股份有限公司 Engine assembly, vehicle and method for reducing engine oil dilution

Also Published As

Publication number Publication date
JPS60173612U (en) 1985-11-18
GB2158152B (en) 1987-11-18
GB8510806D0 (en) 1985-06-05

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Legal Events

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

Effective date: 19960429