US3667431A - Engine temperature control system - Google Patents

Engine temperature control system Download PDF

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Publication number
US3667431A
US3667431A US635A US3667431DA US3667431A US 3667431 A US3667431 A US 3667431A US 635 A US635 A US 635A US 3667431D A US3667431D A US 3667431DA US 3667431 A US3667431 A US 3667431A
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Prior art keywords
coolant
jacket portion
coolant jacket
engine
flow
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US635A
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English (en)
Inventor
Don F Kueny
Howard M Pollari
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Outboard Marine Corp
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Outboard Marine Corp
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    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/20—Multi-cylinder engines with cylinders all in one line
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
    • 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
    • F01P2050/00—Applications
    • F01P2050/02—Marine engines
    • F01P2050/08—Engine room
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1808—Number of cylinders two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Definitions

  • ABSTRACT Disclosed herein is an internal combustion engine including a cooling system having a first coolant jacket portion for cooling the engine in the vicinity of the cylindrical portion of the cylinders and a second coolant jacket portion for cooling the engine in the vicinity of the cylinder heads.
  • Flow of coolant from the first coolant jacket portion is selectively controlled by a restricted by-pass which leads to an overflow discharge, and by each of a thermostatic valve and a pressure responsive valve which are operable to afford coolant flow from the first coolant jacket portion to the second coolant jacket portion when the temperature or pressure in the first coolant jacket portion is above a predetermined value.
  • the invention relates generally to the cooling of internal combustion engines and, particularly to the cooling of twocycle marine engines.
  • the first system includes simple engine cooling passages and a pump for delivering coolant through the passages.
  • Such a system can be described as an uncontrolled system and, while this system prevented over heating of the engine, it generally resulted in the engine running cold under all conditions, i.e., under each of idle, midrange and full speed conditions.
  • the second type 'of system employed a thermostat in the cooling passages, adjacent to the discharge, for blocking flow through the passages until the coolant temperature reached a predetermined level.
  • a system is sometimes referred to as a blocking system and, while the blocking system generally prevented over heating of the engine, the result was, at least after initial warm-up, that the engine was retained relatively warm during idle, mid-range, and full speed conditions.
  • the third system can be referred to as a recirculating system and was arranged to recirculate the coolant through the passages until the coolant was sufficiently warm and then to permit overflow and make-up in such amounts as to maintain the coolant temperature, at least after initial warming.
  • the recirculating system prevented over heating but, like the blocking system, resulted in maintaining the engine relatively warm during idle, mid-range, and full speed conditions.
  • the invention is directed at selectively cooling different areas ofthe engine under idle, mid-range and full speed conditions so as to obtain optimum performance.
  • Prevention of spark plug fouling is particularly advantageous in connection with two-cycle engines wherein the lubricant is mixed with the fuel.
  • both the cylinder head and the cylindrical portion of the cylinders are relatively warm, i.e., at a temperature less than hot, but elevated above ambient temperature.
  • the invention provides an internal combustion engine cooling system having first and second coolant jacket portions.
  • the first coolant jacket portion is connected to a pump, while the second coolant jacket portion is connected to an overflow outlet for freely discharging coolant.
  • the first and second coolant jacket portions are connected by means for selectively controlling coolant flow from the first and second coolant jacket portions.
  • Such means can be in the form of a thermostatic valve for affording coolant flow from the first coolant jacket portion to the second coolant jacket portion when the coolant is above a predetermined temperature and for preventing coolantflow from the first coolant jacket portion to the second coolant jacket portion when the coolant temperature is below the predetermined temperature.
  • such selective control means can include pressure responsive means in the form of a pressure valve connected between the first and second coolant jacket portions for affording coolant flow from the first coolant jacket portion to the second coolant jacket portion when the pressure in the first coolant jacket portion is above a predetermined value and for preventing coolant flow from the first coolant jacket portion to the second coolant jacket portion when the pressure in the mo lant in the first coolant jacket portion is below the predetermined value.
  • the first coolant jacket portion is connected by a restricted by-pass to the overflow outlet to afford a restricted flow of coolant at all times.
  • the first coolant jacket portion is arranged to primarily cool the areas of the engine around or in the vicinity of the cylindrical portion of the cylinders, while the second coolant jacket portion is primarily arranged to cool the engine areas around or in the vicinity of the cylinder heads in the area of the spark plugs.
  • the engine areas around the cylindrical portion of the cylinders will be sufficiently cooled to maintain such areas relatively warm, while the cylinder head area is permitted to become relatively hot.
  • the pressure in the first coolant jacket portion is too low to open the pressure valve because of the low engine speed and because the coolant temperature is too low due to the low engine speed to open the thermostatic valve. Therefore, the system provides a restricted flow of coolant from the pump to the engine area around the cylindrical portion of the cylinders and then through the by-pass to discharge.
  • One of the objects of the invention is to provide a new and improved cooling system for an internal combustion engine and, particularly for a two-cycle outboard motor internal combustion engine.
  • Another object of the invention is the provision of an internal combustion engine having an engine cooling system which will assist in the production by the engine of optimum performance.
  • FIG. 1 is a partially diagrammatic view of an outboard motor in accordance with the invention.
  • FIG. 2 is a diagrammatic view of the cooling system embodied in the outboard motor shown in FIG. 1.
  • FIG. 3 is an enlarged elevational view, partially broken away and in section along line 33 of FIG. 4, of the engine incorporated in the outboard motor shown in FIG. 1.
  • FIG. 4 is a sectional view taken along line 4-4 of FIG. 3.
  • FIG. 5 is a sectional view taken along line 5-5 of FIG. 3.
  • FIG. 6 is a sectional view taken along line 6-6 of FIG. 3.
  • the outboard motor 11 includes a power head 15 mounted on the top of a lower unit 19.
  • the power head 15 includes an internal combustion engine 23 having one or more cylinders 27 each including a cylindrical portion 31 and a head portion 35 having mounted therein a spark plug 37.
  • the power head also includes a crankshaft 39 which is connected to a drive shaft 43 in the lower unit 19.
  • the drive shaft 43 is connected to and drives a water or coolant pump 47 which communicates through a suitable inlet 51 with the water from the lake or stream in which the boat mounted outboard motor 11 is operating.
  • the pump 47 should be capable of providing an increasing volume of water at an increasing pressure upon an increase in engine speed.
  • the pump 47 is of the conventional flexible vane type which is capable of at least partial performance as a positive displacement pump and which is also capable of providing an increasing volume of coolant water at increasing pressures upon increasing engine speed.
  • such flexible vane pumps include a plurality of flexible vanes 48 extending from a rotatably driven hub 49. The discharge from the pump is supplied through a conduit 55 to a water jacket 59 located in surrounding relation to the cylinders 27 and formed in accordance with the invention.
  • the engine cooling water jacket 59 is divided into a first portion 63 which is primarily associated with cooling the engine 23 in the vicinity of the cylindrical portion 31 of the cylinders 27 and a second portion 67 which is primarily associated with cooling the engine 23 in the vicinity of the head portion 35 of the cylinders 27.
  • the first and second coolant jacket portions 63 and 67 are provided by fabricating the engine 23 to include a main casting or first engine block member 71 which defines the major part of the cylindrical portion 31 of each of the cylinders 27. Cast integrally into the main casting 71 in surrounding relation to each cylindrical portion 31 is a first or main section 75 of the first coolant jacket portion 63, which section 75 is in communication at the bottom thereof with the supply conduit 55 from the pump.
  • an intermediate or cylinder head casting or second engine block member 83 which defines the head portion 35 of each cylinder 27 and, along the surface which abuts the main casting 71, includes recesses or passages 87 which form another section of the first coolant jacket portion 63.
  • the waterpassages 87 have a common portion 89 at the top of the casting 83 and a common portion 'or well 91 at the bottom of the casting 83.
  • the part of the first coolant jacket portion 63 in the casting 83 is more in the nature of a passage or conduit than in the nature ofajacket for the cylinder heads 35.
  • a gasket 96 which is aperatured at the top at 99, as shown in dotted outline in FIG. 4, so as to afford coolant flow from the main section 75 of the first coolant jacket portion 63 into the common portion 89 of the passages 87 in the intermediate casting 83 at a location remote from the supply conduit 55, ie, at the top of the engine block 71, and thereby insure flow generally throughout the main coolant jacket section 75.
  • an open recess or jacket 107 Formed along the opposite surface of the intermediate casting See FIG. 5) and spaced from the passages 87 by a web 103 is an open recess or jacket 107 which, in part, forms the second coolant jacket portion 67 and which is of substantially greater extent than the section or part of the first coolant jacket portion 63 in the intermediate casing 83. As shown best in FIG. 5, the recess 107 is divided by a generally vertically extending wall or partition 109 into two parts 111 and 115 which communicate with each other at the top of the casting 83.
  • a cylinder head cover casting or third engine block member 123 which serves to complete the second water jacket 67.
  • the intermediate casing 83 and the cover casting 123 cooperate with one another to provide a mounting for a pressure relief valve, still to be described.
  • the cover includes, at the bottom and at one side of the partition 109, a pocket 125 which communicates with the passage portion 1 11.
  • the recess 107 covers a large portion of the head of the cylinder and provides an effective jacket for the cylinder heads.
  • the intermediate casting 83 further includes means for freely discharging coolant from the coolant jacket.
  • the intermediate casting includes, at the bottom, an overflow discharge passage or outlet or conduit 127 which, at one end, communicates with the portion of the second coolant jacket portion.
  • the conduit 127 can communicate directly with the other portions of the outboard motor for discharging coolant so as to cool the exhaust pipe, if any, and to return the coolant to the lake or stream.
  • the conduit 127 communicates through the gasket 95 with a conduit portion 129 in the main casting 71, which conduit portion 129, in turn, communicates with other portions of the outboard motor so as to cool the exhaust pipe and return the coolant to the lake or stream.
  • Various arrangements can be employed for discharging coolant through an exhaust pipe and for conducting discharge coolant to the lake or stream, which arrangements are not a part of this invention.
  • coolant flow from the first coolant jacket portion 63 to the second coolant jacket portion 67 is selectively controlled by both thermostatic and pressure responsive means. More specifically in accordance with the invention, thermostatic valve means are provided for afiording coolant flow from the first coolant jacket portion 63 to the second coolant jacket portion 67 when the coolant is at a predetermined temperature above the ambient temperature of the water in the lake or stream and for preventing coolant flow from the first coolant jacket portion to the second coolant jacket portion when the coolant temperature is below the predetermined temperature.
  • the bottom of the web 103 of the intermediate casting 83 between the first and second coolant jacket portions is apertured at 131 to receive a thermostatic valve 135 which can be of any conventional construction affording coolant flow when the temperature in the first coolant jacket portion 63 is above the predetermined temperature and for preventing such coolant flow when the temperature in the first coolant jacket portion 63 is below the predetermined temperature.
  • a thermostatic valve For outboard motors, it is common for a thermostatic valve to begin to open when the coolant temperature reaches about F and to continue to open wider as may be required to attempt to prevent the coolant temperature from exceeding 140 F.
  • thermostatic valve 135 Details of the construction of the thermostatic valve 135 and the means for securing the thermostatic valve to the intermediate casting web 103 are not a part of the invention.
  • the valve opens and permits flow from the first coolant jacket portion 63 to the second coolant jacket portion 67.
  • the pressure responsive means comprises a pressure relief valve or arrangement including a second aperture or port 139 in the bottom part of the web 103 of the intermediate casting 83, together with a valve or valve member 141 which is received in the port 139, and a spring 145 which is principally housed in the pocket 125 in the cover casting 123 and which biases the valve member 141 against a seat 147 on the web 103.
  • the spring 145 is preferably designed to permit initial opening of the valve when the engine speed is in the mid-range, for example, between about 2,000 RPM and 4,000 RPM. As is conventional, greater displacement of the valve member 141 from the seat 147 will afford greater coolant flow through the port 129.
  • the details of the construction of the valve member, per se, or of its mounting, except as noted herein, are not a part of this invention.
  • Means in the form of a by-pass from the first coolant jacket portion 63 to the discharge conduit 127 are'provided for permitting a continuous but restricted flow from the first coolant jacket portion 63 whenever the pump is running.
  • the by-pass is dimensioned as, for instance, by use of a restriction 157 (See FIG. 2) to accommodate a water flow approximately equal to the flow generated by the pump at idling speed, i.e., for example, about 600 RPM.
  • a restriction 157 See FIG. 2
  • FIGS. 3, 4, and 5 there is shown a restricted by-pass or conduit 155 extending directly from the bottom of the first coolant jacket portion 63 to the discharge conduit 127.
  • the by-pass can also alternatively comprise a conventional by-pass port (not shown) in the thermostatic valve 135 coupled with a restricted conduit leading from the bottom of the pocket 125 to the discharge conduit 127.
  • the alternate construction has the advantage of assuring drainage of the part 1 11 of the jacket portion 67.
  • the flow of coolant from the pump 47 travels through the first coolant jacket portion 63 and through the restricted by-pass 155 to the discharge conduit 127. Because of the relatively low engine speed and the consequent relative low rate of heat generation, the coolant or water passing through the first coolant jacket portion 63 is not sufficiently heated to open the thermostatic valve 135, although the heat generated is generally sufficient so that the cylindrical portion 31 of the cylinders 27 is relatively warm. Nor is the pressure developed by the pump 47 at the low idle speed sufficient to open the pressure relief valve member 141. Accordingly, there is no coolant flow through the second coolant jacket portion 67 and the cylinder head portion 35 of the cylinders 27 is relatively hot.
  • the additional heat generated by the increased operational speed of the engine 23 will heat the water flowing through the first coolant jacket portion 63 to above the predetermined temperature, for example, 140 F, with consequent opening of the thermostatic valve 135 so as to attempt to maintain the predetermined temperature, thereby permitting flow of coolant to the second coolant jacket portion 67.
  • the pressure developed by the pump 47 will be insufficient to open the pressure relief valve.
  • the water flowing through the first coolant jacket portion 63 is at about the predetermined temperature and therefor the engine in the vicinity of the cylindrical portions 31 remains relatively warm.
  • the gradually opening of the thermostatic valve 135 will permit gradually greater coolant flow to and through the second coolant jacket portion 67, thereby gradually cooling the cylinder heads 35 from a relatively hot condition to a relatively warm condition.
  • the pump 47 will produce sufficient pressure, notwithstanding flow through the by-pass 155 and notwithstanding flow through the thermostatic valve 135, so as to unseat the pressure valve member 141.
  • the resulting increased flow will be substantially cooler than the operating temperature of the thermostatic valve 135, and accordingly the thermostatic valve 135 will close. Closing of the thermostatic valve 135 will tend to cause an increase in the flow through the port 139 and thereby tend to further reduce the coolant temperature.
  • the pump 47 will supply a relatively large volume of water at a relatively high pressure to the first coolant jacket portion 67, thereby causing the pressure valve to remain open and effecting maintenance of the cylindrical portion 31 and the head portion 35 of the cylinders 27 at relatively cool temperatures.
  • the temperature of the coolant will generally be sufiiciently low so as to retain the thennostatic valve in closed condition.
  • the thermostatic valve 135 can be achieved when omitting either the thermostatic valve 135 or the relief valve. Specifically, if the relief valve is omitted, and only the thermostatic valve 135 and by-pass 155 are employed, at least some of the beneficial advantages of the invention can be achieved. Specifically, under such circumstances, the cylinder head portions 35 of the cylinders 27 will operate, in accordance with the invention, at relatively hot temperatures during idle conditions because the thermostatic valve 135 will remain closed and there will be no coolant supply to the second coolant jacket portion 67. Under midrange and high speed operations, the thermostatic valve 135 will generally be open in an attemptto maintain the coolant temperature at approximately F. Accordingly, both the cylindrical portions 31 and the heads 35 of the cylinders 27 will be kept in a relatively warm condition.
  • the coolant jacket arrangement is employed without the thermostatic valve 135, but with the by-pass and the pressure relief valve, operation of the engine 23 at speeds below the mid-range will result in the development by the pump 47 of insufficient pressure to unseat the pressure valve member 141.
  • the cylinder heads 35 will be relatively hot.
  • the pressure setting for the pressure valve can be set relatively low by properly designing the spring 145, or otherwise, so as to afford opening of the pressure valve at speeds only slightly higher than idle.
  • the discharge conduit 127, the by-pass 155 and the supply conduit 55 are arranged to drain the engine of coolant when the engine 23 and therefor the pump 47 is not working. It is also noted that the arrangement of the aperture 99 in the top of the gasket 95 in the first coolant jacket portion 63 and the vertical extent of the portion 109 to adjacent the top of the second coolant jacket portion 67, together with the location of the supply conduit 55, the bypass 155, the discharge conduit, and the thermostatic and pressure valves at the bottom of the coolant jacket 59, cooperatively provide, in each coolant jacket portion 63 and 67, for an inverted U-shaped flow path thereby assuring effective cooling throughout the engine 23.
  • FIGS. 3 through 6 While the construction disclosed in FIGS. 3 through 6 includes passages 87 which are located in the intermediate casting 83 and which form a part of the first coolant jacket portion 63, it is to be understood that the invention also contemplates termination of the first coolant jacket portion 63 in the main casting 71 with provisionfor receipt in the main casting 71 of the thermostatic valve 135 and pressure responsive valve 141 in position for communication with the second coolant jacket portion 67 defined in the intermediate casting 83 on the side of the web 103 opposite from the main casting 71. It is also to be understood that under such circumstances, a restricted bypass port could beemployed between the water jacket portion 63 in the main casting 71 and the discharge conduit 129.
  • the function of the pocket 125 employed in the cover casting 123 could be incorporated in the intermediate casting 83 and a more or less fiat cover casting could be employed.
  • An internal combustion engine including a cooling system comprising a coolant jacket having a first portion for cooling of a first part of said engine and a second portion for cooling of a second part of said engine, means for supplying coolant to said first coolant jacket portion, a discharge conduit connected to said second jacket portion for freely discharging coolant from said second coolant jacket portion, by-pass means for affording restricted coolant flow between said first coolant jacket portion and said discharge conduit, and thermostatic valve means connecting said first and second coolant jacket portions for affording coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolant is above a predetermined temperature and for preventing coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolant temperature is below said predetermined temperature.
  • An internal combustion engine in accordance with Claim 1 including one or more cylinders each having a cylindrical portion and head with a spark plug mounted therein and wherein said first engine part includes the area in the vicinity ofsaid cylindrical portion and wherein said second engine part includes the area in the vicinity of said head and said spark plug.
  • An internal combustion engine including a cooling system comprising a coolant jacket having a first portion for cooling of a first part of said engine and a second portion for cooling of a' second part of said engine, means for supplying coolant to said first coolant jacket portion, a discharge conduit connected to said second jacket portion for freely discharging coolant from said second coolant jacket portion, by-pass means for affording restricted coolant flow between said first coolant jacket portion and said discharge conduit, and pressure responsive valve means connected between said first and second coolant jacket portions for afiording coolant flow from said first coolant jacket portion to said second coolant jacket portion when the pressure in the coolant in said first coolant jacket portion is above a predetermined value and for preventing coolant flow from said first coolant jacket portion to said second coolant jacket portion when the pressure in the coolant in said first coolant jacket portion is below said predetermined value.
  • An internal combustion engine in accordance with claim 4 including one or more cylinders each having a cylindrical portion and head with a spark plug mounted therein and wherein said first engine part includes the area in the vicinity of said cylindrical portion and wherein said second engine part includes the area in the vicinity of said head and said spark plug.
  • An internal combustion engine including a cooling system comprising a coolant jacket having a first portion for cooling of a first part of said engine and a second portion for cooling of a second part of said engine, pump means for supplying coolant to said first coolant jacket portion, means for freely discharging coolant from said second coolant jacket portion, by-pass means for afiording restricted coolant flow between said first coolant jacket portion and said means for freely discharging coolant, thermostatic valve means connecting said first and second coolant jacket portions for affording coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolant is above a predetermined temperature and for preventing coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolant temperature is below said predetermined temperature, and pressure responsive valve means connected between said first and second coolant jacket portions for affording coolant flow from said first coolant jacket portion to said second coolant jacket portion when the pressure in the coolant in said first coolant jacket portion is above a predetermined value and for preventing coolant flow from said
  • thermostatic valve means is located at the bottom of said first coolant jacket portion.
  • bypass means is dimensioned so as to accommodate a maximum flow approximately equal to the quantity of coolant supplied by said pump under engine idle speed operation.
  • An internal combustion engine comprising a first engine block member including wall means at least partially defining a first coolant jacket portion connected to a source of coolant, a second engine block member connected to said first engine block member, a third engine block member connected to said second engine block member, said second and third engine block members including wall means defining a second coolant jacket portion, a passage connected to said second coolant jacket portion for discharging coolant from said second coolant jacket portion, means connected between said first and second coolant jacket portions for selectively controlling coolant flow from said first coolant jacket portion to said second coolant jacket portion, and means connected between said first coolant jacket portion and said discharging passage for by-passing a restricted amount of coolant around said second coolant jacket portion and said coolant flow control means from said first coolant jacket portion to said coolant discharging passage.
  • An internal combustion engine comprising a first engine block member including wall means defining a cylindrical cylinder portion and at least partially defining a first coolant jacket portion extending in heat exchanging relation to said cylindrical cylinder portion and connected to a source of coolant, a second engine block member connected to said first engine block member and including wall means defining a cylinder head portion aligned with said cylindrical cylinder portion, a third engine block' member connected to said second engine block member, said second and third engine block members including wall means defining a second coolant jacket portion extending in heat exchanging relation to said cylinder head portion, a passage connected to said second coolant jacket portion for discharging coolant from said second coolant jacket portion, means connected between said first and second coolant jacket portions for selectively controlling coolant flow from said first coolant jacket portion to said second coolant jacket portion, and means connected between said first coolant jacket portion and said discharging passage for by-passing a restricted amount of coolant around said second coolant jacket portion and said coolant flow control means from said first coolant jacket portion to said coolant dis
  • said means for selectively controlling coolant flow comprises a thermostatic valve means connecting said first and second coolant jacket portions for affording coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolant is above a predetermined temperature and for preventing coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolent temperature is below said predetermined temperature.
  • said means for selectively controlling coolant flow comprises a pressure responsive valve means connected between said first and second coolant jacket portions for affording coolant flow from said first coolant jacket portion to said second coolant jacket portion when the pressure in the coolant in said first coolant jacket portion is above a predetermined value and for preventing coolantflow from said first coolant jacket portion to said second coolant jacket portion when the pressure in the coolant in said first coolant jacket portion is below said predetermined value.
  • An internal combustion engine comprising a first member including wall means at least partially defining a first coolant jacket portion connected to a source of coolant, a second member connected to said first member, a third member connected to said second member, said second and third members including wall means defining a second coolant jacket portion, a passage for discharging coolant from said second coolant jacket portion, means for by-passing a restricted amount of coolant from said first coolant jacket portion to said coolant discharging passage, temperature responsive valve means for controlling coolant flow from said first coolant jacket portion to said second coolant jacket portion, said thermostatic valve means affording coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolant is above a predetermined temperature and preventing coolant flow from said first coolant jacket portion to said second coolant jacket portion when said coolant temperature is below said predetermined temperature, and pressure responsive valve means for controlling coolant flow from said first coolant jacket portion to said second coolant jacket portion, said pressure responsive valve means affording coolant flow from said first coolant jacket portion to said second

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US635A 1970-01-05 1970-01-05 Engine temperature control system Expired - Lifetime US3667431A (en)

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US63570A 1970-01-05 1970-01-05

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US3667431A true US3667431A (en) 1972-06-06

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US (1) US3667431A (ja)
BE (1) BE755473A (ja)
CA (1) CA920009A (ja)
DE (1) DE2061762A1 (ja)
FR (1) FR2074902A5 (ja)
GB (1) GB1289201A (ja)
HK (1) HK39176A (ja)
SE (1) SE374167B (ja)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892209A (en) * 1973-04-03 1975-07-01 Amiot F Liquid-cooled reciprocating engines, more particularly marine engines
US3918418A (en) * 1973-04-06 1975-11-11 Brunswick Corp Marine engine cooling system employing a thermostatic valve means and a pressure relief valve means
US3939807A (en) * 1973-07-30 1976-02-24 Outboard Marine Corporation Engine temperature control system
US4140089A (en) * 1976-02-19 1979-02-20 Outboard Marine Corporation Pressure controlled engine cooling system
US4186872A (en) * 1976-04-22 1980-02-05 Bland William M Jr Alternate path cooling system for liquid cooled devices such as engines
US4357912A (en) * 1980-11-12 1982-11-09 Outboard Marine Corporation Engine cooling system
US4669988A (en) * 1984-08-09 1987-06-02 Outboard Marine Corporation Marine engine cooling system valve assembly
US5038724A (en) * 1990-04-16 1991-08-13 Outboard Marine Corporation Debris resistant valve assembly
US5048468A (en) * 1990-04-16 1991-09-17 Outboard Marine Corporation Marine propulsion device with closed deck cylinder block construction
US5191860A (en) * 1990-04-16 1993-03-09 Outboard Marine Corporation Marine propulsion device with closed deck cylinder block construction
US5381763A (en) * 1993-09-28 1995-01-17 Outboard Marine Corporation Dry head cooling system
US5915346A (en) * 1996-07-17 1999-06-29 Dr. Ing. H.C.F. Porsche Ag Cooling circuit of an internal combustion engine and method of making same
US6071158A (en) * 1997-06-18 2000-06-06 Yamaha Hatsudoki Kabushiki Kaisha Engine cylinder head coolant jacket
US6331127B1 (en) 1998-08-25 2001-12-18 Yamaha Hatsudoki Kabushiki Kaisha Marine engine
US6478643B2 (en) * 2000-01-07 2002-11-12 Donald M. Jolley Water pressure and volume flow regulator
US20090084331A1 (en) * 2007-09-28 2009-04-02 Caterpilllar Inc. Thermostat assembly having integral Cylinder head and thermostat housing
CN102251874A (zh) * 2011-06-20 2011-11-23 昆明瑞尔机电科技有限公司 单缸柴油机齿轮室盖
US9896178B1 (en) * 2016-08-10 2018-02-20 Brunswick Corporation Methods and systems of controlling engine RPM
CN114645768A (zh) * 2020-12-18 2022-06-21 宝能汽车集团有限公司 车辆动力总成冷却***、车辆和控制方法
CN114658530A (zh) * 2021-05-13 2022-06-24 长城汽车股份有限公司 发动机冷却***、节温器的诊断方法和车辆

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136648A (en) * 1976-12-22 1979-01-30 Ford Motor Company Low weight reciprocating engine
US4109617A (en) * 1976-12-22 1978-08-29 Ford Motor Company Controlled flow cooling system for low weight reciprocating engine
IT1139074B (it) * 1981-04-06 1986-09-17 Alfa Romeo Auto Spa Impianto di termostatazione del liquido di raffreddamento di un motore a combustione interna per autoveicolo
US4592733A (en) * 1983-12-12 1986-06-03 Outboard Marine Corporation Water pump for marine propulsion devices
DE3715003A1 (de) * 1987-05-06 1988-11-17 Kloeckner Humboldt Deutz Ag Kuehlsystem fuer eine fluessigkeitsgekuehlte brennkraftmaschine
JP4413396B2 (ja) * 2000-08-11 2010-02-10 本田技研工業株式会社 船外機用水冷エンジン

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1774881A (en) * 1927-11-04 1930-09-02 Fry Charles Henry Monroe Cooling system for internal-combustion engines
US1848987A (en) * 1930-03-21 1932-03-08 Gen Motors Corp Water pump by-pass
US2633834A (en) * 1950-12-01 1953-04-07 Elmer C Kiekhaefer Thermostatic control for engines
US2741231A (en) * 1955-01-10 1956-04-10 Outboard Marine & Mfg Co Thermal controls for engine cooling systems
US3105472A (en) * 1962-05-28 1963-10-01 Chris Craft Corp Cooling system for marine engines
US3358654A (en) * 1965-02-23 1967-12-19 Kiekhaefer Corp Engine cooling system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1774881A (en) * 1927-11-04 1930-09-02 Fry Charles Henry Monroe Cooling system for internal-combustion engines
US1848987A (en) * 1930-03-21 1932-03-08 Gen Motors Corp Water pump by-pass
US2633834A (en) * 1950-12-01 1953-04-07 Elmer C Kiekhaefer Thermostatic control for engines
US2741231A (en) * 1955-01-10 1956-04-10 Outboard Marine & Mfg Co Thermal controls for engine cooling systems
US3105472A (en) * 1962-05-28 1963-10-01 Chris Craft Corp Cooling system for marine engines
US3358654A (en) * 1965-02-23 1967-12-19 Kiekhaefer Corp Engine cooling system

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892209A (en) * 1973-04-03 1975-07-01 Amiot F Liquid-cooled reciprocating engines, more particularly marine engines
US3918418A (en) * 1973-04-06 1975-11-11 Brunswick Corp Marine engine cooling system employing a thermostatic valve means and a pressure relief valve means
US3939807A (en) * 1973-07-30 1976-02-24 Outboard Marine Corporation Engine temperature control system
US4140089A (en) * 1976-02-19 1979-02-20 Outboard Marine Corporation Pressure controlled engine cooling system
US4186872A (en) * 1976-04-22 1980-02-05 Bland William M Jr Alternate path cooling system for liquid cooled devices such as engines
US4357912A (en) * 1980-11-12 1982-11-09 Outboard Marine Corporation Engine cooling system
US4669988A (en) * 1984-08-09 1987-06-02 Outboard Marine Corporation Marine engine cooling system valve assembly
US5038724A (en) * 1990-04-16 1991-08-13 Outboard Marine Corporation Debris resistant valve assembly
US5048468A (en) * 1990-04-16 1991-09-17 Outboard Marine Corporation Marine propulsion device with closed deck cylinder block construction
US5191860A (en) * 1990-04-16 1993-03-09 Outboard Marine Corporation Marine propulsion device with closed deck cylinder block construction
US5381763A (en) * 1993-09-28 1995-01-17 Outboard Marine Corporation Dry head cooling system
US5915346A (en) * 1996-07-17 1999-06-29 Dr. Ing. H.C.F. Porsche Ag Cooling circuit of an internal combustion engine and method of making same
US6071158A (en) * 1997-06-18 2000-06-06 Yamaha Hatsudoki Kabushiki Kaisha Engine cylinder head coolant jacket
US6331127B1 (en) 1998-08-25 2001-12-18 Yamaha Hatsudoki Kabushiki Kaisha Marine engine
US6478643B2 (en) * 2000-01-07 2002-11-12 Donald M. Jolley Water pressure and volume flow regulator
US20090084331A1 (en) * 2007-09-28 2009-04-02 Caterpilllar Inc. Thermostat assembly having integral Cylinder head and thermostat housing
US8074611B2 (en) * 2007-09-28 2011-12-13 Caterpillar Inc. Thermostat assembly having integral cylinder head and thermostat housing
CN102251874A (zh) * 2011-06-20 2011-11-23 昆明瑞尔机电科技有限公司 单缸柴油机齿轮室盖
US9896178B1 (en) * 2016-08-10 2018-02-20 Brunswick Corporation Methods and systems of controlling engine RPM
CN114645768A (zh) * 2020-12-18 2022-06-21 宝能汽车集团有限公司 车辆动力总成冷却***、车辆和控制方法
CN114658530A (zh) * 2021-05-13 2022-06-24 长城汽车股份有限公司 发动机冷却***、节温器的诊断方法和车辆
CN114658530B (zh) * 2021-05-13 2023-11-03 长城汽车股份有限公司 发动机冷却***、节温器的诊断方法和车辆

Also Published As

Publication number Publication date
SE374167B (ja) 1975-02-24
CA920009A (en) 1973-01-30
BE755473A (fr) 1971-02-01
HK39176A (en) 1976-07-02
GB1289201A (ja) 1972-09-13
FR2074902A5 (ja) 1971-10-08
DE2061762A1 (de) 1971-07-15

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