JP4224829B2 - Engine hydraulic control valve mounting structure - Google Patents

Description

  The present invention relates to an engine hydraulic control valve mounting structure, and in particular, can prevent the hydraulic control valve of the hydraulic control device from coming into contact with the vehicle body when the engine is mounted on or removed from the vehicle body. The present invention relates to an engine hydraulic control valve mounting structure that can be avoided.

  An engine mounted on a vehicle or the like is provided with a valve system, an auxiliary machine, a hydraulic control device, and the like. These valve trains, auxiliary machines, hydraulic control devices, etc. are supplied with oil discharged from an oil pump to perform lubrication, operation and control. The engine hydraulic control device supplies the oil discharged from the oil pump to the hydraulic operating device by the hydraulic control valve to operate the hydraulic operating device.

  An example of such an engine hydraulic control valve mounting structure is shown in FIG. In FIG. 10, 202 is an engine, 204 is a cylinder block, 206 is a cylinder head, 208 is a head cover, 210 is an oil pan, 212 is a crankshaft, and 214 is a chain cover. The engine 202 is provided with a variable valve timing device 216 that varies the valve timing of the intake and exhaust valves as a hydraulic control device.

  The variable valve timing device 216 is provided with a hydraulic actuator 218 that is a hydraulic operating device attached to one end of a cam shaft (not shown), and supplies oil discharged from an oil pump (not shown) to the hydraulic actuator 218. An oil control valve 220 that is a hydraulic control valve is provided on the outer surface 222 of the cylinder head 206.

  The variable valve timing device 216 controls the operation of the oil control valve 220 according to the operating state of the engine 202 by a control means (not shown), and oil discharged from an oil pump (not shown) is advanced by the oil control valve 220. The oil is distributed to the retarding oil and supplied to the hydraulic actuator 218, and the valve timing of the intake and exhaust valves is varied by changing the phase of the camshaft with respect to the crankshaft 212.

  As such an engine hydraulic control valve mounting structure, those disclosed in JP-A-8-100611, JP-A-10-184331, JP-A-9-317412, and JP-A-5-71315 are disclosed. is there.

Japanese Patent Laid-Open No. 8-100671 discloses a cam phase angle varying device as a hydraulic control device, and a solenoid valve for controlling the hydraulic pressure of the cam phase angle varying device is a front surface that covers the cylinder block and the front surface of the crankcase. It is attached to the cover.
Japanese Patent Laid-Open No. 8-100611

JP-A-10-184331 discloses a valve timing variable device as a hydraulic control device, and an oil control valve of this valve timing variable device is attached to a cam cap that supports a camshaft. is there.
JP 10-184331 A

Japanese Laid-Open Patent Publication No. 9-317412 discloses a valve timing changing mechanism as a hydraulic control device, and the hydraulic control valve of the valve timing changing mechanism is attached to a cam cap that supports a camshaft. is there.
Japanese Patent Laid-Open No. 9-317412

Japanese Patent Laid-Open No. 5-71315 discloses a variable valve timing mechanism as a hydraulic control device, and a hydraulic control valve of this variable valve timing mechanism is provided between V banks of a V-type internal combustion engine. is there.
JP-A-5-71315

  However, in the conventional mounting structure of the oil control valve 220 which is the hydraulic control valve of the engine 202 shown in FIG. 10, the oil control valve 220 is mounted on the outer surface 222 of the cylinder head 206, so When the engine 202 is mounted / removed, the oil control valve 220 may come into contact with the vehicle body.

  For this reason, the conventional mounting structure has the disadvantage that the oil control valve 220 is damaged due to contact with the vehicle body and the function of the variable valve timing device 216 that is a hydraulic control device is impaired.

The present invention provides a mount mounting boss used when an engine is mounted on a vehicle body, an oil pump driven by a crankshaft, and supplies oil discharged from the oil pump to a hydraulically operated device of a hydraulic control device. comprising a hydraulic control valve, the hydraulic control valve is attached, and a chain cover which is attached to the cylinder block and the cylinder head so as to cover a timing chain for transmitting rotation of the crankshaft of the engine to the intake and exhaust camshafts for , A plurality of auxiliary machines attached to the cylinder block, pulleys attached to the auxiliary machines, and a hydraulic control valve for a vehicle engine in which the auxiliary machine is driven by winding an auxiliary machine driving belt around the pulleys. in the mounting structure, the longitudinal direction of the hydraulic actuator is the hydraulic operating device the timing chain from the engine On the other hand, the chain cover and the head cover attached to the cylinder head protrude outward in the longitudinal direction of the engine to cover the hydraulic actuator, and the mount attachment boss portion is formed on the chain cover below the head cover. The hydraulic control valve is disposed on the upper side, and is disposed on the outer side in the longitudinal direction of the engine from the alignment position with the chain cover on one end side in the longitudinal direction of the cylinder block and the cylinder head and aligned with the mount mounting boss portion. When the projecting height of the hydraulic control valve in the longitudinal direction of the engine is made lower than that of the mount mounting boss, and the engine is viewed from the axial direction of the crankshaft, the alternator and the compressor, which are the auxiliary machines, are the cylinder block Alternator is placed on one side while the other The compressor is disposed, further, the hydraulic control valve is characterized in that it is covered downward by the plurality of pulleys.

As described above, the hydraulic control valve mounting structure for an engine according to the present invention can protect the hydraulic control valve from contact with the vehicle body when the engine is mounted on or removed from the vehicle body.
For this reason, this hydraulic control valve mounting structure of the engine can prevent the hydraulic control valve of the hydraulic control device from coming into contact with the vehicle body when the engine is mounted on or removed from the vehicle body, and avoids damage to the hydraulic control valve. Thus, it is possible to avoid the possibility that the function of the hydraulic control device is impaired.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 show an embodiment of the present invention. 1-4, 2 is an engine mounted on a vehicle (not shown), 4 is a cylinder block, 6 is a cylinder head, 8 is a head cover, 10 is an oil pan, 12 is a crankshaft, and 14 is a chain cover. . The engine 2 is mounted in an engine room (not shown) of a vehicle (not shown).

  The engine 2 supports a crankshaft 12 below the cylinder block 4 and an oil pan 10 is attached so as to cover the crankshaft 12. Further, the engine 2 has a cylinder head 6 attached to the upper part of the cylinder block 4, and suction / exhaust cam shafts 16, 18 that open and close a suction / exhaust valve (not shown) on the cylinder head 6. The head cover 8 is attached so as to be supported by the shafts 20 and 22 and to cover the intake and exhaust camshaft caps 20 and 22.

  A crank timing sprocket 24 is attached to one end of the crankshaft 12 as shown in FIG. Suction / exhaust cam sprockets 26, 28 are attached to the suction / exhaust cam shafts 16, 18 on one end side. A timing chain 30 is wound around the crank timing sprocket 24 and the intake / exhaust cam sprockets 26 and 28. The timing chain 30 transmits the rotation of the crankshaft 12 to the intake / exhaust camshafts 16, 18 and drives the intake / exhaust camshafts 16, 18 to rotate in synchronization with the crankshaft 12.

  As shown in FIGS. 2 and 3, a chain cover is provided at one end in the longitudinal direction of the cylinder block 4 and the cylinder head 6 so as to cover the crank timing sprocket 24, the intake / exhaust cam sprockets 26 and 28, and the timing chain 30. 14 is attached to form a chain chamber 32.

  As shown in FIG. 3, first and second crank pulleys 34 and 36 are attached to the crankshaft 12 outside the chain cover 14. The cylinder block 4 is provided with a plurality of auxiliary machines driven by the crankshaft 12. In this embodiment, as shown in FIGS. 1 and 2, a water pump 38 and an alternator 40 are provided on one side of the cylinder block 4 in the width direction, and an oil pump for power steering is provided on the other side of the cylinder block 4 in the width direction. 42 and an air conditioner compressor 44 are attached.

  In the water pump 38, a water pump pulley 48 is attached to the water pump shaft 46. An alternator pulley 52 is attached to an alternator shaft 50 in the alternator 40. An oil pump pulley 56 is attached to an oil pump shaft 54 in the power steering oil pump 42. A compressor pulley 60 is attached to a compressor shaft 58 in the air conditioner compressor 44.

  A first accessory driving belt 62 is wound around the first crank pulley 34, the water pump pulley 48 and the alternator pulley 52. A second accessory driving belt 64 is wound around the second crank pulley 36, the oil pump pulley 56, and the compressor pulley 60. Tension is applied to the second auxiliary machine driving belt 64 by a belt tensioner 66 attached to the chain cover 14.

  In the engine 2, an oil pump 68 driven by the crankshaft 12 is provided in the chain cover 14. As shown in FIGS. 5 to 8, the oil pump 68 has an inner rotor and an outer rotor (not shown) that are rotatably incorporated in a pump housing 70 provided in the chain cover 14 and is rotated by the crankshaft 12. The oil is sucked from the suction port 72 and compressed, and discharged to the discharge port 74.

  As shown in FIG. 3, the oil discharged to the discharge port 74 flows into the sub gallery 76 via a relief valve (not shown), is filtered by an oil filter (not shown), and the axis of the crankshaft 12 of the cylinder block 4 Supplied to the main gallery 78 oriented in the direction. The oil in the main gallery 78 is supplied to the crankshaft 12, the intake / exhaust camshafts 16, 18, the valve operating system such as the intake / exhaust valve, and the auxiliary system such as the water pump 38.

  As shown in FIG. 5, the engine 2 is provided with a mount attachment boss portion 82 on the outer side surface 80 above the chain cover 14. An engine mount (not shown) is attached to the mount attachment boss portion 82. The engine mount elastically supports the engine 2 mounted on the vehicle body.

  Further, the engine 2 is provided with, for example, an outlet pipe mounting boss portion 84 which is a pipe mounting boss portion adjacent to the mount mounting boss portion 82 on the outer side surface 80 above the chain cover 14. As shown in FIGS. 1 and 2, a water outlet pipe 86, which is a water pipe, is attached to the outlet pipe attachment boss portion 84 by a pipe attachment bolt 88. The water outlet pipe 86 returns the cooling water of the cylinder block 4 to a radiator (not shown).

  Note that either the engine mount or the water outlet pipe 86 is selectively attached to the chain cover 14 depending on how the engine 2 is mounted on the vehicle. For example, an engine mount is attached when the engine 2 is mounted horizontally on the vehicle, and a water outlet pipe 86 is mounted when the engine 2 is mounted vertically on the vehicle.

  The engine 2 is provided with a variable valve timing device 90 as a hydraulic control device. As shown in FIG. 2, the variable valve timing device 90 is provided with a hydraulic actuator 92, which is a hydraulic actuator that changes the phase with respect to the crankshaft 12, attached to one end of the intake camshaft 16. An oil control valve 94, which is a hydraulic control valve that supplies oil discharged from 68, is provided on the outer surface 80 of the chain cover 14.

  The oil control valve 94 incorporates a spool valve (not shown) in the valve main body 96, and a mounting flange portion 98 is provided on the valve main body 96. The oil control valve 94 is mounted by a valve mounting bolt 102 on a valve mounting boss 100 having a mounting flange 98 provided on the outer surface 80 of the chain cover 14. As shown in FIG. 5, the valve mounting boss portion 100 is provided on the outer surface 80 of the chain cover 14 so as to be positioned below the mount mounting boss portion 82 and the outlet pipe mounting boss portion 84.

  In the main gallery 78 into which oil discharged from the oil pump 68 flows, one end of the crankshaft 16 in the axial direction is communicated with the cover communication hole 104 of the chain cover 14 as shown in FIG. One end side of the oil pipe 106 is connected to the cover communication hole 104 by a union bolt 108. The oil pipe 106 has an intermediate portion inserted under the belt tensioner 66 and the other end connected to the oil inlet 112 of the oil control valve 94 by a union bolt 110.

  As shown in FIG. 5, the oil control valve 94 distributes oil taken from the oil inlet 112 to the advance oil outlet 114 and the retard oil outlet 116 as advance oil and retard oil. The advance oil outlet 114 and the retard oil outlet 116 communicate with one end side of the advance oil passage 118 and the retard oil passage 120 provided in the chain cover 14.

  The advance oil passage 118 and the retard oil passage 120 are connected to one end side of the advance oil pipe 122 and the retard oil pipe 124 on the other end side. The other end sides of the advance oil pipe 122 and the retard oil pipe 124 are connected to the cap advance oil passage 126 and the cap retard oil path 128 of the intake camshaft cap 20. The cap advance oil passage 126 and the cap retard oil passage 128 communicate with the hydraulic actuator 92 via the cam shaft advance oil passage 130 and the cam shaft retard oil passage 132 of the intake camshaft 16. Yes.

  The variable valve timing device 90 controls the operation of the oil control valve 94 in accordance with the operating state of the engine 2 by a control means (not shown), and the oil discharged from the oil pump 68 is advanced and retarded by the oil control valve 94. The oil is distributed and supplied to the hydraulic actuator 92, and the phase of the intake camshaft 16 with respect to the crankshaft 12 is changed to vary the valve timing of the intake and exhaust valves.

  As shown in FIG. 5, the mounting structure of the oil control valve 94 of the engine 2 is such that the valve mounting boss portion 100 to which the oil control valve 94 is mounted is positioned below the mount mounting boss portion 82 and the outlet pipe mounting boss portion 84. And provided on the outer side surface 80 above the chain cover 14.

  The oil control valve 94 is mounted on the outer surface 80 of the chain cover 14 so as to be positioned so that at least a part of the oil control valve 94 is covered by a mount mounting boss 82 provided on the outer surface 80 of the chain cover 14. Yes.

  Further, the engine 2 is provided with an outlet pipe mounting boss portion 84 adjacent to the mount mounting boss portion 82 on the outer side surface 80 above the chain cover 14. A water outlet pipe 86 for returning the cooling water from the engine 2 to the radiator is attached to the outlet pipe attachment boss portion 84.

  The oil control valve 94 is provided to be attached to the outer surface 80 of the chain cover 14 such that at least a part of the oil control valve 94 is covered by a water outlet pipe 86 attached to the outlet pipe attachment boss portion 84 of the chain cover 14. ing.

  Further, the engine 2 is provided with a plurality of auxiliary machines such as a water pump 38 driven by the crankshaft 12 attached to the cylinder block 4. First and second crank pulleys 34 and 36 are attached to the crankshaft 12. A plurality of auxiliary machines such as the water pump 38 are provided with a water pump pulley 48, an alternator pulley 52, an oil pump pulley 56, and a compressor pulley 60, respectively.

  The valve mounting boss portion 100 to which the oil control valve 94 is mounted is provided on the outer surface 80 above the chain cover 14 surrounded by the first and second crank pulleys 34 and 36, the water pump pulley 48, and the like.

  The oil control valve 94 is surrounded by the first and second crank pulleys 34 and 36 of the crankshaft 4 and the auxiliary pulleys 48, 52, 56 and 60 of a plurality of auxiliary machines such as the water pump 38, and the lower part thereof. The chain cover 14 is provided so as to be covered and attached to the outer surface 80 of the chain cover 14.

  Next, the operation will be described.

  The engine 2 transmits the rotation of the crankshaft 12 to the intake / exhaust camshafts 16 and 18 through the timing chain 30 to open and close the intake and exhaust valves. Further, the engine 2 rotates the crankshaft 12 to the water pump 38, the alternator 40, the power steering oil pump 42, and the air conditioner compressor 44, which are auxiliary machines, by the first and second auxiliary driving belts 62 and 64. Communicate and drive each accessory.

  The engine 2 is provided with a variable valve timing device 90 as a hydraulic control device. The variable valve timing device 90 is provided with a hydraulic actuator 92 that is a hydraulic operation device attached to the intake camshaft 16, and an oil control valve 94 that is a hydraulic control valve that supplies oil to the hydraulic actuator 92 is attached to the chain cover 14. Provided.

  The variable valve timing device 90 controls the operation of the oil control valve 94 in accordance with the operating state of the engine 2 by a control means (not shown), and the oil discharged from the oil pump 68 is advanced and retarded by the oil control valve 94. The oil is distributed and supplied to the hydraulic actuator 92, and the phase of the intake camshaft 16 with respect to the crankshaft 12 is changed to vary the valve timing of the intake and exhaust valves.

  The oil control valve 94 of the engine 2 uses a mount mounting boss portion 82 provided on the upper outer surface 80 of the chain cover 14 so that at least a part of the upper portion is covered by the mount mounting boss portion 82. It is positioned and attached to the outer surface 80 of the chain cover 14.

  Thus, when the engine 2 is mounted on the vehicle body, it is possible to protect the oil control valve 94 from coming into contact with the vehicle body by the mount mounting boss portion 82.

  The oil control valve 94 is positioned so that at least a part thereof is covered by the water outlet pipe 86 using a water outlet pipe 86 attached to the outlet pipe attaching boss portion 84 of the chain cover 14. The chain cover 14 is attached to the outer surface 80.

  Thus, when the engine 2 is mounted on the vehicle body, the oil outlet valve 86 attached to the outlet pipe attachment boss portion 84 can protect the oil control valve 94 from coming into contact with the vehicle body.

  Further, the oil control valve 94 uses a plurality of auxiliary pulleys such as the first and second crank pulleys 34 and 36 and the water pump pulley 48 of the crankshaft 12 to make these first and second crank pulleys 34 and 36. 36, the water pump pulley 48 and the like so as to be covered so that the lower part is covered and provided on the outer surface 80 of the chain cover 14.

  Thereby, when removing the engine 2 from the vehicle body, the oil control valve 94 can be protected from contact with the vehicle body by various pulleys such as the water pump pulley 48.

  Therefore, the mounting structure of the oil control valve 94 of the engine 2 can prevent the oil control valve 94 of the variable valve timing device 90 from contacting the vehicle body when the engine 2 is mounted on or removed from the vehicle body. The breakage of the valve 94 can be avoided, and the possibility that the function of the variable valve timing device 90 is impaired can be avoided.

  FIG. 9 shows another embodiment. The mounting structure of the oil control valve 94 according to another embodiment is such that a mount mounting boss portion 82 that covers the upper portion of the oil control valve 94 is protruded in the crank axis direction by a height h from the oil control valve 94. It is.

  Thus, when the engine is mounted on the vehicle body, the oil control valve 94 can be more reliably protected from contact with the vehicle body by the mount mounting boss portion 82 that protrudes by a height h from the oil control valve 94. .

  As shown by a two-dot chain line in FIG. 9, the water outlet pipe 86 attached to the outlet pipe attachment boss portion 84 so as to cover the upper part of the oil control valve 94 is disposed in the crankshaft direction by a height h higher than the oil control valve 94. Similarly, the oil control valve 94 can be protected from contact with the vehicle body by being curved so as to protrude.

  In FIG. 1, the water outlet pipe 86 attached to the outlet pipe attachment boss 84 is directed to one side in the width direction of the cylinder head 6, but after being directed downward, one side in the width direction of the cylinder head 6. Therefore, the oil control valve 94 can be covered and protected from contact with the vehicle body.

  In this case, by forming the cross section of the water outlet pipe 86 that covers the oil control valve 94 into a flat elliptical shape, the protrusion of the water outlet pipe 86 in the crank axis direction can be reduced, and Further, a space can be secured between the oil control valve 94 and the water outlet pipe 86 can be prevented from coming into direct contact with the oil control valve 94.

  The engine hydraulic control valve mounting structure according to the present invention prevents the hydraulic control valve of the hydraulic control device mounted on the chain cover from being damaged when the engine is mounted on or removed from the vehicle body. The present invention can also be applied to other engine parts.

1 is a front view of an engine showing an embodiment of a hydraulic control valve mounting structure. It is a partially broken front view of an engine. It is a partially broken side view of an engine. It is a top view of the engine which removed the head cover. It is a front view of a chain cover. It is sectional drawing by the VI-VI line of FIG. It is a rear view of a chain cover. It is a side view of a chain cover. It is a partially broken side view of the engine which shows another Example. It is a front view of an engine showing a conventional example of a hydraulic control valve mounting structure.

Explanation of symbols

2 Engine 4 Cylinder block 6 Cylinder head 8 Head cover 12 Crankshaft 14 Chain cover 16 Intake camshaft 18 Exhaust camshaft 30 Timing chain 34 First crank pulley 36 Second crank pulley 48 Water pump pulley 52 Alternator pulley 56 Oil pump pulley 60 Compressor Pulley 68 Oil pump 82 Mount mounting boss 84 Outlet pipe mounting boss 86 Water outlet pipe 90 Variable valve timing device 92 Hydraulic actuator 94 Oil control valve 100 Valve mounting boss

Claims (3)

Mount mounting boss used when the engine is mounted on the vehicle body, an oil pump driven by the crankshaft, and a hydraulic control valve that supplies oil discharged from the oil pump to the hydraulic operating device of the hydraulic control device And a chain cover attached to the cylinder block and the cylinder head so as to cover a timing chain to which the hydraulic control valve is attached and the rotation of the crankshaft of the engine is transmitted to the intake / exhaust camshaft , In the hydraulic control valve mounting structure for a vehicle engine in which an auxiliary machine driving belt is wound around the pulleys and the auxiliary machine driving belt is wound around the pulleys.
The hydraulic actuator, which is the hydraulic operating device, is arranged outside the timing chain in the longitudinal direction of the engine, while the chain cover and the head cover attached to the cylinder head are projected outward in the longitudinal direction of the engine to cover the hydraulic actuator, The mount mounting boss is disposed on the upper part of the chain cover below the head cover, and the hydraulic control valve is positioned from the alignment position with the chain cover on one end side in the longitudinal direction of the cylinder block and cylinder head. The engine is disposed on the outer side in the longitudinal direction of the engine and side by side with the mount mounting boss, and the projecting height of the hydraulic control valve in the longitudinal direction of the engine is lower than that of the mount mounting boss. If you look at the Discriminator and compressor compressor is disposed on the other side while the alternator is arranged on one side of the cylinder block, furthermore, the hydraulic control valve is characterized in that it is covered downward by the plurality of pulleys engine Hydraulic control valve mounting structure. Among the auxiliary machines, an oil pump or a water pump is disposed above the engine from the alternator and the compressor , and either one of the pulleys for the oil pump or the water pump meshes with the auxiliary machine driving belt. 2. The hydraulic control valve mounting structure for an engine according to claim 1 , wherein the hydraulic control valve is arranged next to a portion where the hydraulic control valve is located . 3. The engine according to claim 1 , wherein a diameter of a pulley attached to the alternator and the compressor is smaller than a diameter of a pulley for the oil pump or the water pump. 4. Hydraulic control valve mounting structure.

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