Abstract: The present invention is applicable to an engine having a cylinder block and an oil pan connected with each other and has an object of improving sealing of the engine and easiness in assembling and manufacturing. In the invention, an oil pan (14) is suspended from a cylinder block (1) via connecting members (cylinder covers (12)) in a vibration-insulating manner, a member having a projection (44) is provided on one of confronted face portions of the cylinder block and oil pan, and a member having a recess (46) is provided on the other confronted face portion. When these members engaged with each other, sealing is established. These members are also slidable so that dimensional errors are tolerated. Thus, assembling is facilitated. The object of the invention is also attained when an elastic member (144) and a mounting member (plate (142)) are in turn adhered onto the oil pan (114), and the mounting member is secured on the cylinder block by tightening members (bolts (146)).

Abstract: An overhead cam engine having an engine lubrication system for delivering oil includes an engine block and a cylinder head having a deck face adapted for mating with the engine block. The deck face forms an acute angle with a horizontal plane of the engine block. A valve train has transverse camshaft journal bearing assemblies with pressurized oil orifices to lubricate the bearings, a camshaft rotatably supported by the cylinder head through the transverse camshaft journal bearing assemblies, cams disposed on the camshaft, and valves actuated by the cams. The cylinder head has a transverse bridging surface bridging the transverse camshaft journal bearing assemblies. A bore is positioned along the bridging surface with a gasket supported by the bridging surface about the bore.

Abstract: In an oil pan for an internal combustion engine particularly for use with a motor vehicle, the oil pan consists of an outer latticed girder structure of a light-weight high-strength material and an inner thin-walled shell of plastic material forming an integral oil pan structure.

Abstract: An outboard motor includes an engine unit in which a crank shaft in a manner that the upper end, in a state of the outboard motor to a hull, projects outside the engine unit and a rotational member such as flywheel magneto device is covered by an engine cover, and the engine unit is covered by an outboard motor cover to which an atmospheric air intake port is formed. The engine cover is composed of inner and outer wall sections between which a closed inner space is defined, the engine cover is connected to a silencer so that the closed inner space of the engine cover is communicated with an inner space of the silencer so as to define an air passage, and an intake port is formed to the air passage to be communicated with the air passage. The atmospheric air introduced through the intake port flows the air passage of the structure mentioned above towards a throttle body with reduced intake noise.

Abstract: A valve adjusting tool for use with internal combustion engines of the V-8 type. A valve cover is adapted for releasably mounting on the valve head, and an elongate opening is formed through the top of the cover with the opening being sufficiently large to enable ingress of valve adjusting devices. Within the cover a plurality of deflector structures are mounted with each structure having a deflecting surface which projects across the paths of spray from oiler holes so as to redirect the oil spray and avoid egress of the spray through the opening.

Abstract: In a fastened joint where two or more joint members are secured together, a method for improving the sealing properties of the joint. The method includes the incorporation of one or more depressions into at least one joint surface of the joint members. The depressions are positioned to reduce the tendency of the joint members to transmit clamping forces between non-sealing areas, thereby increasing the magnitude of the clamping forces transmitted through sealing areas and reducing the opportunity for leakage.

Abstract: The rocker arm cover on a diesel engine can be formed of a rigid molded plastic material to minimize the transmission of noise into the atmosphere. Sonic vibration of the cover can be reduced by reducing the cover material stiffness. The reduced stiffness of the cover material allows the roof area of the cover to be momentarily displaced away from the cylinder head in the presence of an acoustic wave, so that the roof area is not able to develop the restoring force that is necessary for vibrational motion.

Abstract: A cover is provided which partially covers a governor control rod of a small engine. The cover mounts to a portion of an engine housing. The cover prevents a user from tampering with the governor control rod on a small engine.

Abstract: In a fuel injection arrangement for a multi-cylinder internal combustion engine including an engine block with a cylinder head defining combustion chambers and a cylinder head cover wherein the cylinder head has cavities receiving fuel injectors which extend downwardly into the combustion chamber for injecting fuel and upwardly into recesses formed in the side wall of the cylinder head, a fuel distribution rail extends over, and is connected to, the fuel injectors, and the cylinder head cover has an extension projecting sidewardly over the fuel injectors and the fuel distribution rail so as to form a protective shield.

Abstract: A crankshaft bearing support arrangement is disclosed for an engine arranged such that the crankshaft is vertically oriented. The crankshaft rotates within a crankcase chamber defined by the cylinder block and a crankcase cover connected thereto. First web members which support half-bearings extend from the cylinder block. Mating half-bearings are supported by second web members position opposite the first web members. An oil flow passage is defined through the crankcase chamber generally opposite the cylinder block from a top end to a bottom end of the chamber. In one arrangement, the oil flow passage comprises individual passages through the second web members. In another arrangement, the oil flow passage comprises a space between an end of the second web members opposite the cylinder block and the crankcase cover.

Abstract: In an engine block of an internal combustion engine having a clutch housing provided with cut-outs, a thin-walled liner is fitted into the clutch housing to cover the cut-outs so as to provide a clutch housing structure of a relatively low weight.

Abstract: An engine enclosure for a work machine comprises a firewall, left and right-hand side panel structures, and a pivotal hood. Each set of side panel structures is supported by a support tower connected between the frame of the machine and a side margin of the firewall. The support towers are specially shaped to generally conform to the general shape of the panel structures they support. The hood is provided with a hold-open support which maintains the hood in an open position if so desired.

Abstract: An oil pan for an internal combustion engine includes a body defining a reservoir for collecting engine coolant. The reservoir has a bottom and side walls extending upwardly from the bottom to present a flanged lip through which the oil pan may be mounted to the engine. An oil cooler assembly is housed within the body of the oil pan for cooling lubricant received from the engine. The body includes an oil inlet passage formed integrally therewith for receiving lubricant from the engine and delivering lubricant to the oil cooler. In addition, the body also includes an oil pick up passage formed integrally therewith for providing fluid communication between the reservoir and the engine through the flanged lip.

Abstract: In a crankcase of an internal combustion engine with lower and upper crankcase parts joined together along a separation plane extending through the axis of crankshaft bearings mounted in the transverse walls of the crankcase, the upper crankcase part has side walls with cut-outs formed therein and a cup-shaped member is disposed within the crank chamber formed between the transverse walls of the crankcase to cover the cut-outs. The cup-shaped member has an opening adjacent the respective cylinder of a cylinder block extending from the upper crankcase for accommodating a connecting rod extending between the crankshaft and a piston in the respective cylinder of the cylinder block.

Abstract: A covering device for an internal combustion engine shortens the harness used for driving fuel injection valves (and thus minimizes resistance, noise and voltage drop) and improves access to components for fuel leakage checking. Opening portions 20A, 20B are disposed on timing chain covers 1A, 1B. A solenoid driver 360 is located on a front surface of the opening portions 20A, 20B. A harness 361 passes through the opening portions 20A, 20B and is then connected to respective fuel injection valves 400 to 450. Moving or detaching the solenoid driver 360 permits a sensor portion 710 of fuel leakage checker 700 to pass easily through the opening portions 20A, 20B and get near respective fuel injection components.

Abstract: An oil pan to be installed to a cylinder block of an internal combustion engine mounted on an automotive vehicle. The oil pan comprises an oil pan main body section which includes a deep pan section for storing lubricating oil, and a shallow pan section integral with the deep pan section. A baffle plate is fixedly disposed inside the oil pan main body and extends to cover a lower part of an inside of the deep pan section. The baffle plate is located generally horizontal in a condition where the vehicle on which the engine is mounted is located on a generally horizontal road. The baffle plate is located spaced from a surface of the lubricating oil stored inside the deep pan section. The baffle plate includes a generally horizontally extending main body section, and an oil maintaining wall which projects upward from an upper surface of the main body section so as to retain the lubricating oil on the main body section.

Abstract: An oil pan casting for an internal combustion engine having an integrated suction tube formed therein. The suction tube housing is cast as a separate piece, and then affixed to the interior of the oil pan in a clamshell configuration. The interior surface of the oil pan therefore forms a portion of the suction tube enclosure.

Abstract: A cover for an outboard motor is provided to protect an operator from a flywheel. The cover is disposed under the cowl of the outboard motor. The cover is made of a generally rigid material, such as plastic, with first and second sheets being associated together to form conduits with openings extending therefrom. In one particular embodiment, one of the openings is shaped to receive an inlet of a compressor and this provides a positioning aid in attaching the cover to the engine. This device eliminates the need for flexible hoses and accomplishes two tasks with one component. It provides air conduits for the air passing through the cover and it provides a generally rigid means for locating the proper location of the cover.

Abstract: The invention relates to a heat shield with acoustic insulation, comprised of a heat-shielding sheet which bears, on its side facing the heat- and acoustic noise-emitting source, a supporting sublayer bearing an acoustic absorption layer affixed to said sublayer, wherewith said supporting sublayer is disposed such that a defined air gap remains between the heat-shielding sheet and the supporting sublayer.

Abstract: In an outboard marine engine having a vertically oriented crankshaft, a bracket for supporting an AC generator is provided with a pair of cantilever arms for supporting a pivoted portion and a fixed portion of the AC generator, and a belt cover for the engine is partly supported by extensions of these cantilever arms. The bracket is typically mounted to a portion of the crankcase defining a corner between a vertical end surface and a horizontal top surface. By thus securing the belt cover to the bracket for securing the AC generator, it is possible to firmly support the belt cover and prevent undesirable rattling or vibration of the belt cover because the bracket is given with a sufficient rigidity from the need to firmly support the electric generator. Therefore, the firm support of the belt cover can be accomplished without any substantial cost increase.

Abstract: An oil pickup tube assembly for an internal combustion engine comprises a two-piece structure including a base member which attaches to an oil intake or inlet of an engine and includes an elbow therein permitting angling the inlet end of the pickup member into the appropriate position within a sump area of the oil pan. The pickup member comprises a U-shaped tube, one end of which engages the base member and another end of which depends into the sump area, with the inlet end being supported by a bracket attached to the crankcase. The interface between the tube and the base member includes an O-ring seal, with the tube and base member being releasably locked together by relative rotation therebetween and a tab and slot engagement formed between the pieces to permit a certain amount of stress-free misalignment between the base member and the pickup member.

Abstract: A housing cover for sealing a crankshaft housing includes a metal body having an end face adapted to face the flange surface on the crankshaft housing, with the metal body being provided with a plurality of holes for receiving attachment screws for attaching the housing cover to the crankshaft housing. A sealing strip is attached to the end face of the metal body. The sealing strip possesses an end face that is adapted to face the flange surface on the crankshaft housing. The end face of the sealing strip is configured to define at least one recess in the sealing strip, and a sealant is provided in the recess.

Abstract: An oil pan structure for an internal combustion engine includes an oil pan and a baffle plate extending over a bottom of the oil pan. The oil pan is formed with at least one flow regulating barrier projecting upwards from the bottom, and extending along a longitudinal direction of the engine to separate first and second longitudinal channels. The baffle plate is formed with at least one oil collecting hole in the form of a slit extending closely along an upper end of the flow regulating barrier, at a position just behind the upper end of the barrier with respect to a rotational direction of a crankshaft. The flow regulating barrier defines a constricted venturi throat between the lower surface of the baffle plate and the upper end of the barrier, to create a fluid pressure drop as a fluid flows through the venturi throat from the first channel to the second channel.

Abstract: A cylinder body (2) is so formed as to project from a crank chamber (3) in an inclined manner, and a governor gear (50) for driving a centrifugal governor is arranged above a location where a crankshaft (20) is horizontally bridged within the crank chamber (3). An upper wall (71) of the crank chamber (3) is projected upwardly for accommodating the governor gear (50) within the crank chamber (3). An idle gear (45) is arranged at a location above the crankshaft (20) and below the cylinder (46) within the crank chamber (3), and the idle gear (45) is engaged with the crankshaft gear (42) and the governor gear (50) to transmit rotation of the crankshaft gear (42) to the governor gear (50).

Abstract: A dry sump oil cooling system for an internal combustion engine includes an oil pan reservoir, an oil return port, an oil pickup port, and a baffle. The oil pan reservoir has a first end, a second end, a length therebetween, a top and a bottom. Both the oil return port and the oil pickup port are defined at the first end of the reservoir. The oil return port is located adjacent the top of the reservoir while the oil pickup port is located adjacent the bottom of the reservoir. The baffle is coupled to the reservoir between the top and the bottom or free-standing within the reservoir to divide the reservoir into a top chamber and a bottom chamber. The baffle at least partially defines an oil passageway between the top chamber and the bottom chamber at the second end such that most of the oil flows substantially across the length of the oil pan reservoir twice before being returned to the engine by the oil pickup port.

Abstract: An engine cylinder block assembly for a V-type engine wherein inner walls of the cylinder banks define a relatively oil free valley which is closed by a rigid valley cover to provide additional stiffness to the inside walls of the blocks, thereby stiffening the block against vibration and bending. The valley cover also includes sealed pockets for enclosing knock sensors mounted upon upwardly extending bosses in the bottom of the valley to both protect the knock sensors and permit their removal without requiring removal of the valley cover from the engine cylinder block. Oil entrainment due to pulsing air flows between crank chambers of the engine are reduced by providing openings in the valley floor between the front and rear crank chambers of the engine while the adjacent inner crank chambers are separated from direct connection with the valley.

Abstract: In a camshaft support arrangement for supporting a camshaft in the cylinder head of an internal combustion engine by bearing structures, one end bearing adjacent one end of the cylinder head is formed integrally with a removable cover mounted onto the one end of the cylinder head.

Abstract: An internal combustion engine which comprises an engine body, and an air-intake side protective cover disposed at an air-intake side of the engine body, wherein the air-intake side protective cover is provided on the outer surface thereof with recessed grooves. The internal combustion engine may further comprise an exhaust side protective cover which is disposed in opposite to the air-intake side protective cover with the engine body being interposed therebetween and the recessed grooves are made to have substantially the same width and interval as those of a suitable number of heat radiating slit-like through-holes formed parallel with each other in the exhaust side protective cover.

Abstract: A seal arrangement provides a reliable and durable seal even around a protruding edge or corner of a rim of a first component that is connected to a second component, for example the rim of an oil pan that is connected to the rim of a crankcase and the rim of the housing of an equipment mount of an internal combustion engine. An angular edge is formed at the intersection of a first sealing surface between the oil pan and the crankcase and a second sealing surface between the oil pan and the equipment mount housing. First and second grooves extend in skew directions and offset from one another along the first and second sealing surfaces, and an offset recess extends along and in the direction of the intersection edge to interconnect the first and second grooves. A rubber-elastic seal member includes major portions received in the grooves and an offset portion received in the offset recess. The seal member is press-sealed against facing complementary surfaces.

Abstract: In a cylinder block of an internal combustion engine, crank caps are bolted and a crankshaft is rotatably supported by the crank caps. The cylinder block includes bulkheads which divide an internal space of a crankcase into sub-sections for respective cylinders of the engine. Breathing holes are formed in each of the bulkheads and allow the sub-sections of the crankcase to communicate with each other via the breathing holes. Crank cap holes are formed in a bottom of each of the bulkheads. Bolts are fastened to the crank cap holes to fix the crank caps to the bulkheads. The crank cap holes are threaded holes which extend from the bottom of each of the bulkheads and are open to the breathing holes.

Abstract: A method of covering a valve and rocker arm area of an internal combustion engine is disclosed. The engine includes an engine exhaust outlet and an engine air inlet. The method includes the step of providing a valve cover assembly which includes a housing having a chamber defined therein, and a conduit positioned in the chamber. The conduit connects the engine exhaust outlet to the engine air inlet. The method also includes the step of securing the valve cover assembly to the engine so that the cover portion of the valve cover assembly covers the valve and rocker arm area. The method further includes the step of advancing exhaust gas from the engine exhaust outlet to the engine air inlet through the conduit. The method still further includes the step of advancing fluid through the housing so as to cool the conduit. A valve cover assembly for use on an internal combustion engine is also disclosed.

Abstract: In an engine for a vehicle including a bearing cap integral type oil pan which has a plurality of bearing cap sections integrally provided thereon and which is integrally coupled to a cylinder block, connecting bolts are screwed into the bearing cap sections from the cylinder block to integrally couple the cylinder block and the oil pan to each other. An oil pan chamber, which is an as-cast bore made by drawing a die in an axial direction of a crankshaft, is defined to extend continuously in the axial direction of the crankshaft between the bearing cap sections and a bottom wall of the oil pan. Thus, the oil pan can be produced simply, at a low cost, by a casting process and moreover, it is possible to reduce the weight and size of the oil pan and increase the rigidity of the oil pan.

Abstract: A device for releasably attaching a cover (11) to an engine housing (10) of a power-driven tool, such as a motor saw. The device includes at least one spring clip (12) which is adapted to be releasably connected to one of the engine housing and the cover. A guide pin (15) is attached to the engine housing or the cover adjacent to the spring clip and adapted to engage in a complementary recess (16) in the cover or the engine housing. A supporting plate (17); made of a hard material, is attached to the engine housing or the cover around the guide pin.

Abstract: A cylinder head cover to be positioned on a cylinder head of an internal-combustion engine includes first and second separate cover parts fitting together along a longitudinally extending parting joint. The first and second cover parts have complemental portions for surrounding a fuel supply line leading into the cylinder head. Securing devices releasably attach the first and second cover parts to one another and to the cylinder head. A seal is provided between the first and second cover parts for sealing them to one another and for providing that the complemental portions of the first and second cover parts sealingly surround the fuel supply line.

Abstract: A valve cover system is disclosed for use in a piston-and-cylinder type motor which includes a cylinder head assembly including a row of piston rods and valves operatively associated with respective rocker arms. A stud projects through each rocker arm and an adjusting nut is threaded on each stud for adjusting the position of the respective rocker arm. An elongated stud girdle extends along the row for unitarily locking the adjusting nuts together. At least one mounting post projects upwardly from the stud girdle. A valve cover is provided for covering the cylinder head assembly and is secured to the mounting post projecting from the stud girdle.

Abstract: A sealing structure is provided for an outboard motor in which an engine is disposed on an upper portion of an engine holder in a state of an outboard motor mounted to a hull, an oil pan is mounted to a lower portion of the engine holder, and the engine, the engine holder and the oil pan are covered with an engine cover unit.

Abstract: In a housing cover, particularly a valve cover for an internal combustion engine, having a seal surface extending around its circumference at one side thereof with a seal structure molded onto the seal surface, deformable projections are formed on the side opposite the seal surface for engaging the housing cover by a tool when the seal is molded onto the seal surface.

Abstract: An oil pan for an internal combustion engine is an assembly of a tank member defining a deep interior space section for storing a lubricating oil, and a main frame member having a shallow bottom defining a shallow interior space section for collecting the oil. The main frame member further includes first and second side walls defining a bottomless open interior space section for leading the oil from the shallow interior space section into the deep space section. The main member is further formed with at least one transverse bridge extending over the bottomless open space section between the side walls to improve the rigidity. The transverse bridge is reinforced by a longitudinally extending projection such as a thin wall rib projecting laterally from one of the side walls or a flow regulating barrier projecting upward from the shallow bottom.

Abstract: In a camshaft drive housing for an internal combustion engine supporting auxiliary equipment, an oil pump is mounted in the housing cover and driven by the engine crankshaft. It supplies oil under pressure to an oil filter also mounted on the camshaft drive housing and the pressure of the oil leaving the oil filter is communicated back to the oil pump by way of a passage extending through the housing cover for controlling the oil pump.

Abstract: A harness holder is disposed to extend along the inside of a cover member which covers a driving pulley and a timing belt, and a harness extending from a crank angle sensor is supported in the harness holder and prevented from contacting the belt and/or pulley. A locking claw projectingly provided at an end of the harness holder is fitted into a grommet mounted on the cover member to guide the harness 21 to the outside of the cover member. Thus, a fixing device such as a bolt for fixing the harness holder can be eliminated and moreover, a tip end of the locking claw can be visually observed from the outside of the cover member to confirm the mounted state of the harness holder.

Abstract: A cooling and lubricating system for an internal combustion engine wherein an oil cooler and oil filter are mounted at a lower portion of the cylinder block in a recess formed by the crankcase member to provide a compact assembly and wherein the oil filter is readily accessible. All of the passages for supplying lubricant and coolant to and from the oil cooler and oil filter are formed integrally in the body of the engine so as to avoid the use of external conduits.

Abstract: A cylinder head cover for a direct-injecting internal-combustion engine has an injection nozzle holder arranged in the cylinder head between charge cycle valves and a clamping shoe for fixing the position of the injection nozzle holder in a receiving bore in the cylinder head. The cylinder head cover is constructed to be pulled in in the area of the injection nozzle holder and has a passage for the injection nozzle holder. The pulled-in cylinder head cover in the area of the injection nozzle holder is pulled down to the cylinder head. Starting from that area, a drainage-groove-type indentation leads to the inlet side of the internal-combustion engine.

Abstract: A cylinder head cover of an internal combustion engine with a solenoid-controlled injection device using pump-nozzle units designed so that the solenoid valves are supplied with power in a manner that is advantageous from the manufacturing point of view and provides reliable operation. For this purpose, the cylinder head cover covers the entire injection device and contact elements designed as inserts are injected into the cylinder head cover made of plastic in an injection molding process. The contact elements automatically come into a close-fitting contact with contact surfaces mounted on the outside of the solenoid valves when the cylinder head cover is mounted on a cylinder head. The contact elements are combined with contact segments in a central connector mounted on the outside of the cylinder head cover, wherein the power is supplied for the solenoid valves centrally from a controller.

Abstract: An engine having an accessory drive and mounting arrangement is disclosed. The engine has a camshaft drive comprising a drive pulley connected to an end of a crankshaft, and drive pulleys connected to the ends of each a intake and exhaust valve actuating camshaft. The crankshaft drives the camshafts via a timing belt engaging the drive pulleys. A mounting bracket is provided for connecting the engine to a frame member and for connecting one or more engine accessories to the engine. The mounting bracket is connected to the engine and includes a cover portion cooperating with a separate camshaft cover to enclose the camshaft drive pulleys and timing belt pathway.

Abstract: A four-stroke-cycle engine of a motorcycle arranged between front and rear wheels thereof has a crank case in which a crank shaft is arranged and a plurality of cylinder assemblies operatively connected to the crank shaft and includes a front-side cylinder assembly and a rear-side cylinder assembly along a longitudinal direction of a motorcycle body. Each of the cylinder assemblies is composed of a cylinder block, a cylinder head mounted to a head portion of the cylinder block and a head cover covering the cylinder head. The cylinder assemblies are arranged so as to provide V-shapes along the longitudinal direction of the motorcycle body. A mating surface formed between the head cover and the cylinder head of at least the front-side cylinder assembly of the plural cylinder assemblies has an inclination obliquely downward towards the front wheel with respect to a mating surface formed between the cylinder head and the cylinder block of the front-side cylinder assembly.

Abstract: A compact arrangement for an inline multiple-cylinder engine for driving a pair of twin overhead camshafts. The camshafts are driven by a drive that includes an intermediate shaft and at least a portion of the drive and the intermediate shaft is accessible through one or more openings formed in the side of the engine body. A manifold is also provided on this side of the engine and is configured so that it does not substantially obstruct the openings.

Abstract: An internal combustion engine having a variable valve timing mechanism with a hydraulic control that is mounted on the front of the cylinder head for ease of accessibility and for ease of conversion of the existing engine. The engine includes an oil filter, oil cooler, and coolant pump, which are disposed and driven in a way so as to maintain short flow paths and permit internal conduits to be formed in the engine so as to avoid the possibility of leakage. The variable valve timing mechanism is controlled by hydraulic pressure supplied by the lubricating system, and a control valve assembly is mounted on the cover for the variable valve timing mechanism with the control passages being formed integrally in this cover. In addition, one of the timing chains may be easily accessed for adjustment without removing the cover through the removal of a bolt that holds an accessory mounting bracket to the engine.

Abstract: An extension tube for an internal combustion engine oil fill tube comprises an elongate bent cylindrical member having one threaded end adapted to engage within a threaded port in a valve cover. The tube includes a protruding nub thereon which is positioned to coact with a cavity between segmented threads in the port to produce a detent between the tube and the port when the tube is threaded into the port to a desired relative rotational orientation, for maintaining such orientation. The tube further includes a peripheral flange which compresses a high swell material seal member placed therebeneath against an area disposed about the port to ensure integrity of the engagement.

Abstract: In a front cover which is mounted on the front end of an internal combustion engine to cover an engine camshaft drive mechanism and which includes means for supporting auxiliary engine components such as a power steering pump, the front cover further includes a slide-in mounting structure supporting a container which, when inserted into the slide-in mounting structure, is firmly supported by the front cover and communicatively connected to an auxiliary engine component.

Abstract: In a component support arrangement for mounting auxiliary components such as an alternator, a power steering pump and an air conditioning compressor to an engine, the component support arrangement consists of a crank shaft drive cover mounted on the front of the engine and including a reinforcement structure disposed on the inside of the camshaft drive cover between reception structures for the auxiliary engine components and comprising ribs and webs which extend transversely between the reception structures and are connected thereto.