ENGINE ASSEMBLY WITH VIBRATION-ISOLATED IGNITION COIL DEVICE

Abstract

Engine ignition coil assembly, comprising: an ignition coil housing (50) containing an ignition coil device (52) and an electrical connector (54) for the ignition coil device (52) mounted on the ignition coil housing (50); an elastomer sleeve (28) that supports the ignition coil housing (50); a single fastening element (74) extending through a fastening opening (86) in the ignition coil housing (50) parallel to the elastomer sleeve (28); and an elastomeric insulator (76) arranged on the ignition coil housing (50) at the mounting opening (86) around the single mounting element (74); wherein the elastomeric sleeve (28) and the elastomeric insulator are designed to isolate the ignition coil housing (50) from vibrations, wherein the elastomeric insulator (76) is arranged between a union nut (311) and ignition coil housing (50).

Description

INTRODUCTION

[0001] The present disclosure relates to an ignition coil assembly for an engine comprising an ignition coil housing. In an internal combustion engine, an ignition coil housing is mounted on a component of an engine block assembly, such as a cylinder head. An electrical connector can be integrally attached to the housing to supply electrical energy from a power source to a transformer within the ignition coil housing, which supplies a spark plug mounted on the engine block assembly.

[0002] JP 2006 - 291 874 A shows an ignition coil for an internal combustion engine designed for installation without modifying the cylinder head shape and resulting in a lighter weight. The ignition coil comprises a housing for generating high voltage and a socket mounted on the housing that transmits the high voltage to the spark plug. An elastic rubber component of the socket insulates the high voltage and prevents fluid from entering the spark plug hole. This rubber component features a passage for the spark plug hole and a large-hole, ball-type check valve.

[0003] JP 2012 - 186 280 A shows an ignition coil for an internal combustion engine with improved vibration resistance. The ignition coil comprises a primary coil, a secondary coil, and an iron core, which are magnetically connected, as well as a housing to accommodate the coils and the iron core. An outwardly projecting flange structure is formed on the side of the housing, which has an entry hole for receiving a mounting bolt. The entry hole contains a cylindrical bushing with collars at both ends, the outer diameter of which is larger than the diameter of the entry hole. The outer diameter of the flange is larger than the seating surfaces of the bolt and the mounting lug of the cylinder head. The bolt secures the ignition coil to the engine via the collars of the bushing, thus providing a mechanically stable mounting of the ignition coil and increasing vibration resistance.

[0004] JP H06-25673Y shows an ignition coil for an internal combustion engine in which the core is formed by joining several magnetic elements. The ignition coil includes a mounting frame section that is positioned longitudinally in the engine between the cylinder banks and is integrally connected to a bolt-in insert. The cylinder head is equipped with a double overhead camshaft system, with the cores mounted on both sides of the contact surface and the integral component fixed to the top of the cylinder head between the camshaft banks. The secondary coil of the ignition coil is electrically connected directly from above to the spark plug via the frame of the integral component, resulting in a compact, stable, and easily installed ignition coil assembly.

[0005] US 6,005,464 A discloses an ignition coil for an engine designed to be inserted into a cylindrical bore of the engine and connected directly to the spark plug. The coil comprises a housing made of conductive magnetic material that is held at ground potential. This prevents the output factor of the magnetic flux density generated by the ignition coil from decreasing as it propagates through the cylinder head and eliminates the possibility of arcing from the high-voltage side of the ignition coil to the housing or the cylinder head. SUMMARY

[0006] The object of the invention is to improve the absorption of engine vibrations. This object is achieved by the subject matter according to claim 1. Further developments are described in the dependent claims.

[0007] Electrical components, such as an electrical connector mounted on an ignition coil housing, can be sensitive to engine vibrations. An engine ignition coil assembly disclosed herein provides an ignition coil housing that can be mounted on an engine block assembly and is isolated from engine vibrations. The engine ignition coil assembly includes an ignition coil housing. The ignition coil housing contains an ignition coil device. An electrical connector for the ignition coil device is mounted on the ignition coil housing. An elastomeric sleeve supports the ignition coil housing. A single fastener extends through a mounting opening in the ignition coil housing parallel to the elastomeric sleeve. An elastomeric insulator is arranged around the single fastener at the mounting opening on the ignition coil housing.Accordingly, if the elastomeric sleeve is mounted on an engine block assembly, the ignition coil housing can be spaced from the engine block assembly by the elastomeric sleeve and clamped between the ignition coil sleeve and the elastomeric insulator. The vibration paths from the engine block assembly to the ignition coil housing are limited to those transmitted through the elastomeric sleeve or through the elastomeric insulator via the mounting element.

[0008] The elastomeric sleeve and insulator can be sufficiently elastically deformable to dampen engine vibrations and prevent excessive vibration of the electrical connector and ignition coil assembly. Using the elastomeric sleeve as a vibration damper and employing a single mounting point for the ignition coil housing can reduce the number of components, decrease mass, and meet installation space constraints.

[0009] The engine block assembly can define a spark plug opening, and the elastomer sleeve can have a through-hole aligned with the spark plug opening. The engine block assembly can have a raised lip surrounding the spark plug opening, and the elastomer sleeve can rest on the raised lip, with the raised lip extending into a groove in the elastomer sleeve.

[0010] The individual fastener and mounting hole in the ignition coil housing can be configured such that the individual fastener can be displaced within the mounting hole relative to the ignition coil housing, as in an engine block assembly to which the elastomeric sleeve is mounted and to which a proximal end of the individual fastener is attached. The elastomeric sleeve can be supported on at least one cylinder head, cam cover, or rocker arm cover of the engine assembly, and the individual fastener can be attached to this. In other words, the individual fastener can move within the mounting hole relative to the ignition coil housing when the engine assembly vibrates, and the insulator can then dampen this movement.

[0011] In yet another aspect, the elastomer sleeve can extend laterally to the mounting opening in the ignition coil housing, and the elastomer sleeve can have a mounting opening that is aligned with the mounting opening in the ignition coil housing. The individual fastening element can extend through both the mounting opening in the ignition coil housing and the mounting opening in the elastomer sleeve. The elastomer sleeve thus supports the ignition coil housing at both the mounting opening and the spark plug opening, and the fastening element extends through the mounting opening in the elastomer sleeve instead of spanning a gap.

[0012] The electrical connector can be carried from an opening in a side wall of the ignition coil housing at right angles to a central axis of a through-hole in the elastomer sleeve and extend through it.

[0013] The motor assembly may include a sleeve positioned and configured within the mounting hole to limit compression of the ignition coil housing at the mounting hole. The sleeve may have a sleeve opening, and the mounting element may be configured to slide within the sleeve opening relative to the ignition coil housing.

[0014] In one or more aspects, the single fastener can be configured to span a gap between the ignition coil housing and the engine block assembly. For example, the elastomer sleeve can move the ignition coil housing away from the engine block assembly through a gap, and the single fastener can span the gap. A shoulder of the single fastener can rest against the engine block assembly. Alternatively, a flange of the single fastener can rest against the engine block assembly adjacent to the proximal end of the single fastener, and a height of the elastomer sleeve between the engine block assembly and the ignition coil housing can be greater than the height of the single fastener's flange, thus displacing the ignition coil housing out of the single fastener's flange along a longitudinal axis of the single fastener.A distal end of the single fastening element can be configured to extend beyond the ignition coil housing opposite the engine block assembly, and a union nut can be configured to fit the distal end of the single fastening element with the elastomeric insulator between the union nut and the ignition coil housing.

[0015] In one aspect, an engine assembly comprises an ignition coil housing with an inner cavity and a first housing wall with a coil opening. An ignition coil device is configured for placement within the inner cavity. An engine block assembly has a spark plug opening. An elastomeric sleeve is configured for attachment to the engine block assembly at the spark plug opening and has a through-hole. The ignition coil housing is configured for attachment to the elastomeric sleeve with an output terminal of the ignition coil device extending through the ignition coil opening and the through-hole, and functionally connected to a spark plug mounted in the spark plug opening on the engine block assembly. The ignition coil housing has a mounting opening extending parallel to the through-hole.A mounting element is configured to extend through the mounting opening and attach to the engine block assembly. The ignition coil housing and engine block assembly are configured such that the ignition coil housing is completely displaced from the engine block assembly by the elastomer sleeve. An elastomeric insulator is configured to support the mounting element on a second housing wall of the ignition coil housing, opposite the first housing wall, such that the elastomeric sleeve and the elastomeric insulator isolate the ignition coil housing from vibrations of the engine block assembly.

[0016] In one aspect, an electrical connector is carried by and extends through the ignition coil housing. The electrical connector may include an input terminal connected to the ignition coil assembly for powering the ignition coil assembly.

[0017] The aforementioned functions and advantages, as well as other functions and advantages of the present disclosure, will become apparent from the following detailed description of the best possible practical implementation of the disclosure presented, in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a fragmentary cross-sectional view of an engine assembly with an engine ignition coil assembly including an ignition coil device. Fig. 2 is a side view of the engine arrangement of Fig. 1. Fig. Figure 3 is a fragmentary cross-sectional view of an alternative engine arrangement with an engine ignition coil arrangement including an ignition coil device. Fig. Figure 4 is a fragmentary cross-sectional view of an alternative engine arrangement with an engine ignition coil arrangement including an ignition coil device. Fig. 5 is a side view of the engine arrangement of Fig. 4. Fig. Figure 6 is an exploded view of a connecting element, a union nut and an insulator of the motor assembly of Fig. 5. Fig. Figure 7 is a schematic representation of an alternative embodiment of an ignition coil housing with a pressure-limiting sleeve at a mounting opening in the ignition coil housing. DETAILED DESCRIPTION

[0018] Referring to the drawings, in which the same reference numbers refer to similar components, shows Fig. 1. An engine arrangement such as exists for a vehicle, including a motor vehicle or a non-automotive vehicle. The vehicle may be driven autonomously or with human intervention and may include, among other things, a mobile platform in the form of a commercial vehicle (car, truck, off-road vehicle, etc.), an industrial vehicle (bus, etc.), an agricultural vehicle, a passenger car, an aircraft, a watercraft, a train, an off-road vehicle, a passenger transport device, a robot, and the like, to fulfill the purposes of this disclosure. Furthermore, the engine arrangement 10 could be designed for a non-vehicle application.

[0019] The engine assembly 10 is an internal combustion engine that uses spark ignition. The engine assembly 10 includes an engine block assembly 12, which has an engine block 14 that defines the combustion cylinders 16 (one is shown). A spark plug 18 is supported by another engine component of the engine block assembly 12, such as a cylinder head, cam cover, or rocker arm cover. As shown, the engine component is referred to as the cylinder head 20. A gasket 22 can help to seal the interface between the engine block 14 and the cylinder head 20.

[0020] The cylinder head 20 has a spark plug opening 24 in which the spark plug 18 is mounted such that a spark plug tip 26 projects into the combustion cylinder 16. An elastomer sleeve 28 is arranged on the engine block assembly 12, resting on a raised lip 30 of the cylinder head 20 so that it is supported by the cylinder head 20. The raised lip 30 and the elastomer sleeve 28 enclose the spark plug opening 24. Specifically, a flange 32 of the elastomer sleeve 28 encloses the raised lip 30. A central section 34 of the elastomer sleeve 28 extends downwards into the spark plug opening 24. The raised lip 30 extends into a groove 36 between the flange 32 and the central section 34, which is designed to receive the raised lip 30. For example, the raised lip 30 and the groove 36 can form a ring.Accordingly, the elastomeric sleeve 28 is designed for attachment to the engine block assembly 12 at the spark plug opening 24. The elastomeric sleeve 28 has a through-hole 38 which is aligned with the spark plug opening 24.

[0021] The engine assembly 10 includes an ignition coil housing 50, which contains an ignition coil assembly 52. ​​An electrical connector 54 for the ignition coil assembly 52 is fixedly connected to and attached to the ignition coil housing 50. Specifically, the integrated electrical connector 54 is supported by and extends through an opening 55 in a side wall 57 of the ignition coil housing 50, perpendicular to a central axis C2 of the through-hole 38 of the elastomer sleeve 28. The electrical connector 54 includes a relatively low-voltage input terminal 56, which is connected to the ignition coil assembly 52 to supply current to a primary winding 58 of a transformer 60. Thus, for example, a controller C can control a power source P, such as a battery, to supply electrical energy to the transformer 60 via the input terminal 56.The input terminal 56 can include a variety of pins that mate with an outer section of the electrical connector 54. The transformer 60 includes the primary winding 58 and a secondary winding 62, both wound around an iron core (not shown). The secondary winding 62 has a greater number of turns than the primary winding 58, so that a relatively high voltage is induced in the secondary winding 62 when the current supplied to the primary winding 58 is interrupted, such as by a semiconductor switch in the control circuit C. An output terminal 64 extends through an ignition coil opening 65 in a first housing wall 67 (i.e., the lower housing wall) and connects the secondary winding 62 to a conductive spring 66, which in turn is connected to an electrode 68 extending through an insulator 70.

[0022] The timing of the current change across the semiconductor switch controls the voltage at electrode 68. The voltage at electrode 68 spans a gap 72 to the spark plug tip 26 and causes a spark that ignites the fuel in cylinder 16. Engine vibrations arise from the forces generated by the combustion process. The integrity of the relatively small components of the electrical connector 54 and the ignition coil assembly 52 is best preserved when these components are isolated from engine vibrations. Accordingly, the ignition coil housing 50, the elastomeric sleeve 28, a mounting element 74, and an elastomeric insulator 76 on the mounting element 74 can be referred to as the engine ignition coil assembly and are designed to isolate the ignition coil housing 50 and the associated electrical components from engine vibrations.

[0023] First, the ignition coil housing 50 is configured such that it is not in contact with the engine block assembly 12. Instead, a lower (proximal) surface 84 of the ignition coil housing 50 is mounted on an upper (distal) surface 85 of the elastomer sleeve 28 such that the ignition coil housing 50 is spaced from the engine block assembly 12 by the elastomer sleeve 28. In the Fig. 1 and Fig. Figure 2 shows a gap 80 between the outer surface 82 of the cylinder head 20 and a lower (proximal) surface 84 of the ignition coil housing 50. The outer surface 82 and the lower surface 84 are shown as flat, so that the resulting gap 80 has a uniform height. However, the surfaces 82 and 84 can be uneven, with a non-uniform resulting gap 80, as long as the surfaces 82 and 84 do not come into contact with each other, so that the ignition coil housing 50 is completely displaced from the engine block assembly 12 by the elastomer sleeve 28.

[0024] In addition to the sleeve 28, which supports the ignition coil housing 50, the ignition coil housing 50 is attached to the engine block assembly 12 by a single fastener 74. In other words, there are no additional fasteners connecting the ignition coil housing 50 to the engine block assembly 12. The single fastener 74 extends through a mounting opening 86 in the ignition coil housing 50. The single fastener 74 has a longitudinal axis C1 parallel to a central axis C2 of the elastomer sleeve 28 through the through-hole 38 of the elastomer sleeve 28. The mounting opening 86 is wider than the single fastener 74. Thus, for example, both can be seen in a cross-section along a central axis of the single fastener 74, orthogonal to the view of Fig. 1, be circular, wherein the diameter of the individual fastening element 74 is smaller than the diameter of the opening 86, such that a free space 88 is provided between the individual fastening element 74 and the coil housing 50 in the fastening opening 86.

[0025] A threaded proximal end 90 of the individual fastening element 74 is attached to the engine block assembly 12 by threading it into a threaded fastening opening 92 in the cylinder head 20. The individual fastening element 74 is wider in diameter adjacent to the proximal threaded end 90, so that a shoulder 94 of the individual fastening element 74 rests on the surface 82 of the cylinder head 20.

[0026] The elastomeric insulator 76 is arranged around the single fastening element 74 at the mounting opening 86 on a second housing wall 69 (i.e., a distal wall, also referred to as the upper wall) of the ignition coil housing 50. For example, the elastomeric insulator 76 can be an annular structure with a lower (proximal) surface 96 in contact with an upper (distal) surface 98 of the ignition coil housing 50. The second housing wall 69 is arranged opposite the first housing wall 67. A fastening head 100 of the single fastening element 74 rests against an upper (distal) surface 102 of the elastomeric insulator 76, so that the insulator 76 supports the single fastening element 74 on the second housing wall 69.After the spark plug 18 is threaded into a threaded section 104 of the cylinder head 20 at the spark plug opening 24, a lower section 106 of the elastomer sleeve 28 is placed over the spark plug 18 and the lip 30 is inserted into the groove 36. The ignition coil housing 50 is attached to the elastomer sleeve 28, with the high-voltage clamp 64 extending into the through-hole 38 and connected to the spring 66. The ignition coil housing 50 is positioned on the elastomer sleeve 28 such that the mounting opening 86 is aligned with the threaded opening 92. The insulator 76 is placed on the surface 98 at the mounting opening 86 or is already arranged around the mounting element 74 under the head 100. The single fastening element 74 is then pushed through the fastening opening 86, whereby the threaded end 90 is screwed to the cylinder head 20.

[0027] The combined height of the insulator 76, the ignition coil housing 50, and the elastomeric sleeve 28, measured from the distal surface 85 to the bottom of the flange 32, can be slightly greater than or equal to the height of the single fastener 74, measured from the underside of the head 100 to the shoulder 94. This allows the elastomeric sleeve 28 and the insulator 76 to be slightly compressed when the single fastener 74 is inserted into the mounting opening 92. Accordingly, the ignition coil housing 50 is spaced apart from (i.e., not in contact with) the engine block assembly 12 and sandwiched between the elastomeric sleeve 28 and the elastomeric insulator 76. The vibration paths from the engine block assembly 12 to the ignition coil housing 50 are limited to those through the elastomeric sleeve 28 and through the elastomeric insulator 76 via the single fastener 74.The elastomeric sleeve 28 and the elastomeric insulator 76 are made of natural rubber or another elastically deformable material with greater elastic deformability than the ignition coil housing 50, which is made of plastic or metal, and the single fastener 74 (which is made of steel). The elastomeric sleeve 28 and the elastomeric insulator 76 are elastically deformable to dampen engine vibrations and prevent excessive vibration of the electrical connector 54 and the ignition coil assembly 52. Since the mounting opening 86 is wider by the clearance 88 than the single mounting element 74, the single mounting element 74 can be displaced along its longitudinal axis in the mounting opening 86 with respect to the ignition coil housing 50, which moves with the cylinder head 20 and its vibrations, but does not transmit any vibrations to the ignition coil housing 50 due to the elastomer sleeve 28 and the elastomeric insulator 76.

[0028] Fig. Figure 3 shows another motor assembly 210, which is identical to the description relating to motor assembly 10, except that the elastomeric sleeve 28 is replaced by an elastomeric sleeve 228, which includes a side section 229 extending laterally from the through-bore 38 to the threaded mounting opening 92 in the cylinder head 20. The single mounting element 74 thus extends through the mounting opening 86 in the ignition coil housing 50, through a mounting opening 215 in the elastomeric sleeve 228, and into the mounting opening 92 in the cylinder head 20. The clearance 80 of the motor assembly 10 between the elastomeric sleeve 28 and the single mounting element 74 of Fig. 1 is filled by the side section 229 in the engine assembly 210. A larger area of ​​the underside 84 of the ignition coil housing 50 is thus in contact with and supported by the elastomer sleeve 228, which further isolates the ignition coil housing 50 from engine vibrations. Identical components are identified with the same reference numbers and function as described with respect to the engine assembly 10.

[0029] The Fig. Figures 4-5 show another motor assembly 310, which is similar in all aspects to the motor assembly 10, except that the single fastener 74 is replaced by a single fastener 374 and a union nut 311. The single fastener 374, the union nut 311, and the insulator 76 are shown in the exploded view in Figure 4-5. Fig. Figure 6 shows that a flange 313 of the individual fastener 374 abuts the surface 82 of the cylinder head 20 adjacent to a proximal threaded end 390 of the individual fastener 374. A height H1 of the elastomer sleeve 28 between the engine block assembly 12 and the ignition coil housing 50 is greater than a height H2 of the flange 313 of the individual fastener 374, such that the ignition coil housing 50 is displaced from the flange 313 of the individual fastener along a longitudinal axis C1 of the individual fastener 374. The individual fastener 374 is sufficiently long such that a threaded distal end 387 of the individual fastener 374 extends across the ignition coil housing 50 opposite to the engine block assembly 12. In other words, the distal thread end 387 extends beyond the distal surface 102 of the insulator 76 when the thread end 390 is secured in the fastening opening 92.The area of ​​surface 392 of flange 313 is larger than the area of ​​surface of shoulder 94 in . Fig. 1, which provides stability to the single fastener 374 when it is first attached to the cylinder head 20, and then the coil housing 50 is placed onto the elastomeric sleeve 28 and over the single fastener 374. The insulator 76 is then placed over the distal end of the single fastener 374. The union nut 311 has internal threads that are then screwed into the distal threaded end 387 of the single fastener 374, with the elastomeric insulator 76 positioned between the union nut 311 and the ignition coil housing 50. Identical components are identified with the same reference numbers and function as described with respect to the engine assembly 10.

[0030] Fig.Figure 7 shows the engine coil housing 50 with a slightly larger mounting opening 86A than the mounting opening 86 and with a sleeve 87 arranged in the mounting opening 86A. The mounting opening 86A extends completely through the coil housing 50 from the first housing wall 67 to the second housing wall 69. The sleeve 87 is a tubular structure with a longitudinal center axis that coincides with the longitudinal center axis of the mounting opening 86A. Like the mounting opening 86A, the sleeve 87 has a sleeve opening 89 that extends through the sleeve 87. The sleeve opening 89 is sufficiently large such that a clearance similar to the clearance 88 exists between the individual mounting element 74 or 374 and the inner surface of the sleeve 87, allowing the individual mounting element 74 or 374 to be displaced along its longitudinal axis with respect to the ignition coil housing 50 within the sleeve opening 89 during vibration of the engine block assembly.The sleeve 87 can be made of steel or another material harder than the ignition coil housing 50, so that the sleeve is designed to limit the compression of the ignition coil housing 50 at the mounting opening 86A (i.e., to limit the inward compression of the ignition coil housing in one direction along the length of the mounting opening 86A). The sleeve 87 can be attached to the ignition coil housing 50 by overmolding the ignition coil housing 50 with the sleeve 87.

[0031] While the best ways of implementing the disclosure have been described in detail, those skilled in the art who are familiar with the technique described herein will recognize various alternative embodiments and designs with which the invention can be implemented within the scope of the patent claims listed below.

Claims

[1] Engine ignition coil assembly comprising: an ignition coil housing (50) containing an ignition coil device (52) and an electrical connector (54) for the ignition coil device (52) mounted on the ignition coil housing (50); an elastomer sleeve (28) that supports the ignition coil housing (50); a single fastening element (74) extending through a fastening opening (86) in the ignition coil housing (50) parallel to the elastomer sleeve (28); and an elastomeric insulator (76) arranged on the ignition coil housing (50) at the mounting opening (86) around the single mounting element (74); wherein the elastomeric sleeve (28) and the elastomeric insulator are designed to isolate the ignition coil housing (50) from vibrations, wherein the elastomeric insulator (76) is arranged between a union nut (311) and ignition coil housing (50). [2] Engine ignition coil arrangement according to claim 1, wherein the individual fastening element (74) and the fastening opening (86) are configured such that the individual fastening element (74) is displaceable in the fastening opening (86) with respect to the ignition coil housing (50). [3] Engine ignition coil arrangement according to claim 1, wherein: the elastomer sleeve (28) extends laterally to the mounting opening (86) in the ignition coil housing (50) and has a mounting opening that is aligned with the mounting opening (86) in the ignition coil housing (50); and the single fastening element (74) extends both through the fastening opening (86) in the ignition coil housing (50) and through the fastening opening in the elastomer sleeve (28). [4] Engine ignition coil arrangement according to claim 1, wherein: the electrical connector (54) is carried from an opening in a side wall of the ignition coil housing (50) at right angles to a central axis of a through-hole (38) of the elastomer sleeve (28) and extends through it. [5] Engine ignition coil arrangement according to claim 1, further comprising: a sleeve (87) which is arranged and configured in the mounting opening to limit the compression of the ignition coil housing (50) at the mounting opening; and wherein the sleeve (87) has a sleeve opening (89) and the fastening element (74) is configured to move in relation to the ignition coil housing (50) in the sleeve opening. [6] Engine ignition coil arrangement according to claim 1 in combination with an engine block arrangement (12), wherein: the elastomer sleeve (28) is arranged on the engine block assembly (12) and the ignition coil housing (50) is spaced apart from the engine block assembly (12) by the elastomer sleeve (28) in order to dampen vibrations of the engine block assembly (12) from the ignition coil housing (50); and the single fastening element (74) has a proximal end (90) that is attached to the engine block assembly (12) and is configured to span a gap between the ignition coil housing (50) and the engine block assembly (12). [7] Engine ignition coil assembly and engine block assembly according to claim 6, wherein a shoulder (94) of the individual fastening element (74) rests against the engine block assembly (12). [8] Engine ignition coil arrangement according to claim 1 in combination with an engine block arrangement (12), wherein: the engine block arrangement (12) defines a spark plug opening (24); the elastomer sleeve (28) has a through-hole (38) which is aligned with the spark plug opening (24); the engine block assembly (12) has a raised lip (30) which surrounds the spark plug opening (24); and the elastomer cuff (28) rests on the raised lip (30), the raised lip (30) extending into a groove of the elastomer cuff (28). [9] Engine ignition coil arrangement according to claim 1 in combination with an engine block arrangement (12), wherein: a flange (313) of the individual fastening element (74) abuts the engine block assembly (12), which adjoins a proximal end (90) of the individual fastening element (74); and a height of the elastomer sleeve (28) between the engine block assembly (12) and the ignition coil housing (50) is greater than a height of the flange (313) of the individual fastening element (74), so that the ignition coil housing (50) is displaced from the flange (313) of the individual fastening element (74) along a longitudinal axis of the individual fastening element (74). [10] Engine ignition coil assembly and engine block assembly (12) according to claim 9, wherein a distal end (387) of the individual fastening element (74) is configured to extend beyond the ignition coil housing (50) in the opposite direction to the engine block assembly (12); and the engine assembly (12) further comprises: a union nut (313) configured to fit the distal end (387) of the single fastening element (74) with the elastomeric insulator (76) between the union nut (313) and the ignition coil housing (50).

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