JP2002021515A - Structure of valve timing control type internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize and simplify a structure when changing valve timing by either or both of two cam shafts 2, 3 supported on a cylinder head 1 by a variable valve timing mechanism 8. SOLUTION: The variable valve timing mechanism 8 is provided by fitting it in one end of the cam shaft on one side and is rotatably supported on the cylinder head 1 so that the variable valve timing mechanism and a shaft receive part of the cam shaft are overlapped in the direction of the cam shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve timing control device for arbitrarily changing the valve timing when one or both of an intake valve and an exhaust valve are opened and closed during operation of an internal combustion engine. The present invention relates to a structure of an internal combustion engine provided with:

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. Hei 10-1963 as prior art.
Japanese Patent Application Publication No. 24 and Japanese Patent Application Laid-Open No. Hei 10-317925 have the following configuration of this type of valve timing control type internal combustion engine.

That is, the rotation of the crankshaft is transmitted to one of two camshafts rotatably supported on the upper surface of a cylinder head via a timing belt or a timing chain, and the other camshaft is rotated. An output power transmission wheel such as a gear that transmits the rotation of the one camshaft to the other camshaft is rotatably fitted on the shaft, while an outer outer housing and an inner rotor inside the outer housing are provided. Hydraulic variable valve timing mechanism, with its inner rotor fixed to the one camshaft and its outer housing fixed to the output power transmission wheel, respectively,
The rotation of the one camshaft is transmitted to the power transmission wheel to the other camshaft via the variable valve timing mechanism. At this time, the variable valve timing mechanism is formed between an outer housing and an inner rotor. By supplying or discharging the hydraulic pressure to or from the hydraulic chamber, the output power transmission wheel is appropriately moved with respect to the one cam shaft by advancing or delaying the outer housing by an appropriate rotation angle with respect to the inner rotor. The valve timing by the other camshaft is arbitrarily changed by advancing or delaying the rotation angle.

In this case, in the prior art, the power transmission wheel for output to the other camshaft and the variable valve timing device on the one camshaft are connected to one end of the one camshaft with respect to the cylinder head. It is arranged at a position inside the bearing portion which is rotatably supported.

[0005]

However, as described above,
When the output power transmission wheel to the other camshaft and the variable valve timing device are disposed inside the bearing, the output power transmission wheel, the variable valve timing device and the bearing are arranged in the axial direction of the camshaft. Since the three members are arranged in a line, the length of the camshaft is increased, and the length of the cylinder head in the crankshaft direction is increased, resulting in an increase in size.

Further, in the prior art, the supply and discharge of the hydraulic pressure to and from the hydraulic chamber in the variable valve timing device is supported at one end of the camshaft with respect to the cylinder head via an oil passage formed inside the camshaft. Since it is configured to be carried out from the bearing portion, two oil passages must be formed inside the camshaft so as to extend in the axial direction, and a great deal of trouble is required to form these two oil passages. In addition, there is a problem that the pressure loss of hydraulic pressure is increased.

In the prior art, the valve timing of the other one of the two camshafts is changed.
The valve timing by one camshaft or both camshafts cannot be changed.

[0008] In this case, Japanese Patent Laid-Open No.
JP-A-317504 discloses that in addition to providing a variable valve timing device between one of the two camshafts and a power transmission wheel for input to the one of the two camshafts, It has been proposed to separately change the valve timing of both camshafts by providing a variable valve timing device between the other camshaft and the power transmission wheel for input to the other camshaft. However, this requires a variable valve timing device for each of the two camshafts, resulting in an increase in the size and weight of the internal combustion engine and an increase in price.

An object of the present invention is to solve these problems of the prior art.

[0010]

In order to achieve this technical object, a first aspect of the present invention is to dispose a camshaft for an intake valve and a camshaft for an exhaust valve on an upper surface of a cylinder head. ,
The internal combustion engine further includes an input power transmission wheel that transmits rotation from the crankshaft to one camshaft, and an output power transmission wheel that transmits rotation from the one camshaft to the other camshaft. At one end of one of the camshafts, an outer housing and an inner rotor rotatably provided therein are provided with a variable valve timing mechanism which relatively advances or retards them by an appropriate rotation angle. The output power transmission wheel is fixed to an inner rotor of the variable valve timing mechanism, and an outer housing of the variable valve timing mechanism is rotatably supported with respect to a cylinder head. Is fixed to the input power transmission wheel. Is the thing.

According to a second aspect of the present invention, a camshaft for an intake valve and a camshaft for an exhaust valve are provided on an upper surface of a cylinder head. An internal combustion engine comprising: an input power transmission wheel for transmitting rotation; and an output power transmission wheel for transmitting rotation from the one camshaft to the other camshaft, wherein an outer housing is provided at one end of the one camshaft. And an inner rotor rotatably provided therein, and a variable valve timing mechanism arranged to advance or delay these relative to each other by an appropriate rotation angle is disposed. The outer housing of the variable valve timing mechanism is rotatably supported on the cylinder head while the camshaft is fixed. In, characterized in that fixed and the input power transmission wheel, and said output power transmission wheel. "
Things.

[0013] Further, a third aspect of the present invention provides a fuel cell system, wherein a camshaft for an intake valve and a camshaft for an exhaust valve are provided on an upper surface of a cylinder head, and one camshaft from the crankshaft. An internal combustion engine comprising: an input power transmission wheel for transmitting rotation to the camshaft; and an output power transmission wheel for transmitting rotation from the one camshaft to the other camshaft. A housing and two inner rotors rotatably provided in the housing are provided.The outer housing and one of the inner rotors are relatively advanced or delayed by an appropriate rotation angle, and the outer housing and the other inner rotor are relatively moved. A variable valve timing mechanism that advances or delays by an appropriate rotation angle is disposed, and one of the inner rotors in the variable valve timing mechanism is The power transmission wheel for power is fixed to the other inner rotor with the one cam shaft fixed thereto, and the outer housing of the variable valve timing mechanism is rotatably supported with respect to a cylinder head. And the input power transmission wheel is fixed. "

[0013]

According to the first aspect, the rotation transmitted from the crankshaft to the input power transmission wheel is directly transmitted to one camshaft via the outer housing in the variable valve timing mechanism, while the outer housing is rotated. Is transmitted to the other camshaft from the inner rotor therein through the output power transmission wheel.

In this case, by controlling the rotation angle of the inner rotor with respect to the outer housing in the variable valve timing mechanism to advance or delay as appropriate, the valve timing by the one camshaft is not changed and the other camshaft is not changed. The valve timing by the camshaft can be arbitrarily changed.

According to a second aspect of the present invention, the rotation transmitted from the crankshaft to the input power transmission wheel is directly transmitted to the other camshaft via the outer housing and the output power transmission wheel in the variable valve timing mechanism. ,
Rotation in the outer housing is transmitted to one camshaft via an inner rotor therein.

In this case, by controlling the rotation angle of the inner rotor with respect to the outer housing in the variable valve timing mechanism so as to advance or delay as appropriate, the valve timing by the other camshaft is not changed and the one camshaft is not changed. The valve timing by the camshaft can be arbitrarily changed.

Furthermore, in claim 3, the rotation of the crankshaft is transmitted to the outer housing in the variable valve timing mechanism via the input power transmission wheel,
The rotation in the outer housing is transmitted to one camshaft via one inner rotor and simultaneously transmitted to the other camshaft via the other inner rotor and the output power transmission wheel.

In this case, by controlling the rotation angles of both inner rotors with respect to the outer housing in the variable valve timing mechanism so as to advance or delay as appropriate, the valve timing by the one camshaft and the other camshaft are controlled. Can be arbitrarily changed independently and separately from each other.

That is, since the valve timings of the two camshafts can be arbitrarily changed separately by a single variable valve timing mechanism, compared to the case where each of the two camshafts is provided with a variable valve timing mechanism. In addition, cost reduction and reduction in size and weight can be achieved.

In any one of these claims, one end of one camshaft is supported by a bearing portion of the cylinder head via an outer housing of the variable valve timing mechanism. Of the three components, the bearing portion, the variable valve timing mechanism, and the output power transmission wheel, disposed on the camshaft, the bearing portion and the variable valve timing mechanism may overlap in the axial direction of the camshaft. Therefore, the length of the camshaft can be made shorter than the case where the three members of the bearing portion, the variable valve timing mechanism and the output power transmission wheel are provided side by side in the axial direction, as in the prior art, and the crankshaft in the cylinder head is provided. The length in the axial direction can be reduced, and the size can be reduced accordingly.

Further, in any of the above claims, the outer housing of the variable valve timing mechanism is supported by the bearing portion of the cylinder head, so that the variable valve timing mechanism can be hydraulically operated. In this case, the supply and discharge of hydraulic pressure to and from the hydraulic chamber in the variable hydraulic valve timing mechanism can be performed from a bearing that rotatably supports the outer housing of the variable valve timing mechanism with respect to the cylinder head. Therefore, unlike the prior art, there is no need to form a long oil passage inside the camshaft, so that the pressure loss of the hydraulic pressure can be reduced and the machining of the camshaft can be facilitated.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a first embodiment.

In this figure, reference numeral 1 denotes a cylinder head in an internal combustion engine. On the upper surface of the cylinder head 1, a cam shaft 2 for an exhaust valve and a cam shaft 3 for an intake valve are provided with a crank (not shown). The camshafts 2 and 3 are arranged so as to extend in parallel with the shafts, and an appropriate portion in the middle of the two camshafts 2 and 3 is rotatably supported on the cylinder head 1 by bearings 4 and 5.

One end of one of the camshafts 2 and 3 for the exhaust valve is provided with a timing pulley 6 serving as an input power transmission wheel and the other of the camshafts 3 for the intake valve.
A main drive gear 7 which is an output power transmission wheel for transmitting rotation to the motor, and a hydraulic valve timing variable mechanism 8 are provided. The timing pulley 6 has a timing belt ( (Not shown))
The main driving gear 7 is always meshed with a driven gear 16 fitted on the intake valve camshaft 3.

The variable hydraulic valve timing mechanism 8
Is a cylindrical outer housing 8a and an inner rotor 8 rotatably provided in the outer housing 8a.
b, a plurality of vanes 8c are provided on the outer periphery of the inner rotor 8b and slidably contact the inner peripheral surface of the outer housing 8a, and hydraulic chambers 8d and 8e are formed on both sides of the vane 8c. By supplying the hydraulic pressure to the two hydraulic chambers 8d and 8e, the outer housing 8a and the inner rotor 8b rotate together, and the two hydraulic chambers 8d and 8e are rotated.
The hydraulic pressure is supplied to one hydraulic chamber 8d and the hydraulic pressure in the other hydraulic chamber 8e is simultaneously discharged, or the hydraulic pressure is supplied to the other hydraulic chamber 8e and
By discharging the oil pressure in d, the outer housing 8a and the inner rotor 8b are relatively advanced or retarded by an appropriate rotation angle.

The variable valve timing mechanism 8
The inner rotor 8b of the exhaust valve cam shaft 2
The main drive gear (output power transmission wheel) 7 is fixed to the inner rotor 8b so as to be rotatable, and the outer housing 8a of the variable valve timing mechanism 8 is connected to the camshaft 2 for the exhaust valve. Bolt 8f
The outer housing 8a
A bearing 9 provided integrally with the cylinder head 1;
The upper surface of the cylinder head 1 is rotatably supported by a bearing cap body 10 fastened by a plurality of bolts 17, and furthermore, the timing pulley (input power transmission wheel) is provided on the outer end surface of the outer housing 8a. 6 is fixed by fastening the bolt 18.

The outer peripheral surface of the outer housing 8a has an oil groove 11 communicating with the one hydraulic chamber 8d.
And an oil groove 12 communicating with the other hydraulic chamber 8e. The bearing cap body 10 is provided with two oil passages 13 and 14 communicating with the oil grooves 11 and 12, respectively, and a hydraulic switching valve 15 is provided. At 15, the hydraulic pressure is simultaneously supplied to both hydraulic chambers 8d and 8e, and the hydraulic pressure is supplied to one hydraulic chamber 8d and the other hydraulic chamber 8e is simultaneously supplied.
It is configured to appropriately switch between discharging the hydraulic pressure in the hydraulic chamber 8e and discharging the hydraulic pressure in the hydraulic chamber 8d while supplying the hydraulic pressure to the other hydraulic chamber 8e. Reference numeral 19 denotes a cover that covers the timing belt.

In this configuration, the rotation transmitted from the crankshaft to the timing pulley (input power transmission wheel) 6 is:
While being transmitted to the exhaust valve camshaft 2 via the outer housing 8a in the variable valve timing mechanism 8 as it is, the rotation in the outer housing 8a is transmitted from the inner rotor 8b therein to the main driving gear (output power transmission wheel) 7. Is transmitted to the intake valve camshaft 3 through

In this case, hydraulic pressure is supplied to and discharged from the hydraulic chambers 8d and 8e between the outer housing 8a and the inner rotor 8b in the variable valve timing mechanism 8 by operating the hydraulic switching valve 15. Accordingly, the rotation angle of the inner rotor 8b with respect to the outer housing 8a can be controlled so as to advance or delay as appropriate.
, The valve timing by the intake camshaft 3 can be changed arbitrarily.

Next, FIGS. 4 to 6 show a second embodiment.

In the second embodiment, the valve timing by the intake valve camshaft 3 is changed by using the hydraulic valve This is a case where the valve timing by the exhaust valve camshaft 2 is arbitrarily changed without changing. Note that the same components or portions as those in the first embodiment are denoted by the same reference numerals.

The variable hydraulic valve timing mechanism 8 'used here is a cylindrical outer housing 8a'.
And an inner rotor 8b 'rotatably provided in the outer housing 8a', and a plurality of vanes slidably contacting the outer periphery of the inner rotor 8b 'on the inner peripheral surface of the outer housing 8a'. 8c ',
Hydraulic chambers 8d 'and 8e' are formed on both sides of the vane 8c ', and hydraulic pressure is supplied to the hydraulic chambers 8d' and 8e ', so that the outer housing 8a' and the inner rotor 8 are formed.
b 'rotates together to supply hydraulic pressure to one of the two hydraulic chambers 8d' and 8e ', and simultaneously discharge the hydraulic pressure in the other hydraulic chamber 8e', or At the same time as supplying hydraulic pressure to the hydraulic chamber 8e ', one hydraulic chamber 8
By discharging the hydraulic pressure in d ', the outer housing 8a' and the inner rotor 8b 'are relatively advanced or retarded by an appropriate rotation angle.

The inner rotor 8b 'of the variable valve timing mechanism 8' is fixed to the exhaust valve cam shaft 2 by fastening bolts 8f ', while the outer rotor 8b' of the variable valve timing mechanism 8 'is fixed. After the housing 8a 'is rotatably fitted to the exhaust valve camshaft 2, the outer housing 8a' is
The cylinder head 1 is rotatably supported by a bearing portion 9 and a bearing cap body 10 provided integrally with the cylinder head 1,
Further, the main driving gear (output power transmission wheel) 7 is fixed to the outer housing 8a ', and the timing pulley (input power transmission wheel) 6 is fixed to the outer housing 8a'.

In this case, also in this case, the one hydraulic chamber 8 is provided on the outer peripheral surface of the outer housing 8a '.
d 'and the other hydraulic chamber 8e'
And an oil groove 12 'communicating therewith. Also,
The bearing cap body 10 ′ is provided with the two oil grooves 1.
Two oil passages 1 communicating with each of 1 'and 12'
3 'and 14' are drilled and the hydraulic switching valve 1
A hydraulic switching valve 15 'is provided to supply the hydraulic pressure to both the hydraulic chambers 8d' and 8e 'at the same time. 8e 'and the other hydraulic chamber 8
The configuration is such that the hydraulic pressure is supplied to e ′ and the hydraulic pressure in one hydraulic chamber 8d ′ is simultaneously discharged.

In this configuration, the rotation transmitted from the crankshaft to the timing pulley (input power transmission wheel) 6 is:
Outer housing 8a 'and main drive gear (output power transmission wheel) in variable valve timing mechanism 8'
7, the rotation of the outer housing 8a 'is transmitted to the exhaust valve camshaft 2 via an inner rotor 8b' therein.

In this case, the outer housing 8
a ′ and the inner hydraulic chamber 8b between the inner rotor 8b ′.
By supplying and discharging hydraulic pressure to the d 'and 8e' by operating the hydraulic switching valve 15 ', the rotation angle of the inner rotor 8b' with respect to the outer housing 8a 'is controlled to advance or delay as appropriate. Therefore, the valve timing of the exhaust valve camshaft 2 can be arbitrarily changed without changing the valve timing of the intake valve camshaft 3.

FIGS. 7 to 10 show a third embodiment.

In the third embodiment, an exhaust valve camshaft 2 is provided by using a hydraulic variable valve timing mechanism 8 ".
And the valve timing by the intake valve camshaft 3 are independently and separately changed arbitrarily. In this case, the same parts or portions as those in the first embodiment are denoted by the same reference numerals.

The variable hydraulic valve timing mechanism 8 "used here is provided inside the outer housing 8a".
It has two inner rotors, an inner rotor 8b for an intake valve configured similarly to the first embodiment and an inner rotor 8b 'for an exhaust valve configured similar to the second embodiment. I have.

One of the two inner rotors 8b, 8b 'is provided with a plurality of vanes 8c on its outer periphery, which are slidably in contact with the inner peripheral surface of the outer housing 8a ". Hydraulic chambers 8d and 8e are formed on both sides of the vane 8c.
By supplying the hydraulic pressure to the hydraulic chamber 8e, the outer housing 8a ″ and the inner rotor 8b rotate together, supplying the hydraulic pressure to one of the hydraulic chambers 8d and 8e, and simultaneously supplying the hydraulic pressure to the other hydraulic chamber 8e. Or by supplying the hydraulic pressure to the other hydraulic chamber 8e and simultaneously discharging the hydraulic pressure in the one hydraulic chamber 8d, the outer housing 8a ″ and the inner rotor 8b can be relatively appropriately positioned. It is configured to advance or retard by the rotation angle.

Further, the two inner rotors 8b, 8
The inner rotor 8b 'for the exhaust valve of the other b' is provided on its outer periphery with a plurality of vanes 8c 'slidably in contact with the inner peripheral surface of the outer housing 8a ". Hydraulic chambers 8d 'and 8e' are formed in the hydraulic chambers 8d 'and 8e'.
The outer housing 8a ″ and the inner rotor 8b ′ rotate together to supply hydraulic pressure to one of the two hydraulic chambers 8d ′ and 8e ′, and at the same time to supply the other hydraulic chamber 8d ′.
e 'or the other hydraulic chamber 8
By supplying the oil pressure to the inside e 'and simultaneously discharging the oil pressure in the one hydraulic chamber 8d', the outer housing 8a "and the inner rotor 8b 'are relatively advanced or retarded by an appropriate rotation angle. ing.

The outer housing 8a "of the variable valve timing mechanism 8" is rotatably fitted to the exhaust valve camshaft 2 and then provided integrally with the cylinder head 1. The timing pulley (input power transmission wheel) 6 is rotatably supported by the bearing portion 9 and the bearing cap body 10 ″ to fix the timing pulley (input power transmission wheel) 6 to the outer housing 8 a ″. The main driving gear (output power transmission wheel) 7 is fixed to one of the intake valve inner rotors 8 b, and the other exhaust valve inner rotor 8 b ′ is bolted to the exhaust valve cam shaft 2 by bolts 8 f ″. It is fixed by fastening.

In this case, the bearing cap 10 "is provided with two hydraulic switching valves 15, 15 ', and both hydraulic switching valves 15, 15'.
And each of the hydraulic chambers 8d, 8e, 8d ', 8e' in the variable valve timing mechanism 8 "are formed by four oil grooves 11 provided on the outer peripheral surface of the outer housing 8a".
Four oil passages 13, 14, 13 ', 14' are provided which are connected via 12, 11, ', 12'.

In this configuration, the rotation of the crankshaft is transmitted via the timing pulley (input power transmission wheel) 6 to the outer housing 8 in the variable valve timing mechanism 8 ″.
a ", the outer housing 8a"
Is transmitted to the exhaust valve camshaft 2 via the exhaust valve inner rotor 8b ', and at the same time, the intake valve camshaft via the intake valve inner rotor 8b and the main driving gear (output power transmission wheel) 7. Transfer to 3.

In this case, the rotation angle of the inner rotors 8b, 8b 'with respect to the outer housing 8a "in the variable valve timing mechanism 8" is controlled so as to advance or delay as appropriate, whereby the exhaust valve camshaft 2 is controlled. And the valve timing of the intake valve camshaft 3 can be arbitrarily and independently changed by one valve timing variable mechanism 8 ″.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing a first embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan sectional view showing a second embodiment.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a plan sectional view showing a third embodiment.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 7;

FIG. 10 is a sectional view taken along line XX of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cylinder head 2 Exhaust valve cam shaft 3 Intake valve cam shaft 6 Timing pulley (input power transmission wheel) 7 Main gear (output power transmission wheel) 8, 8 ', 8 "Valve timing variable mechanism 8a, 8a' 8a "Outer housing 8b, 8b 'Inner rotor 8c, 8c' Vane 8d, 8e, 8d ', 8e' Hydraulic chamber 9 Bearing part in cylinder head 10 Bearing cap body 11, 12, 11 ', 12' Oil groove 13, 14, 13 ', 14' Oil passage 15, 15 'Hydraulic switching valve

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3G016 AA08 AA19 BA50 CA05 CA18 CA23 CA24 CA29 CA36 CA52 DA06 DA22 FA38 GA01 3G018 AB12 BA09 BA10 BA33 CA19 DA20 DA63 DA72 DA74 FA01 GA14 GA18 3G024 AA05 AA08 AA19 BA23 FA13 GA10

Claims (3)

[Claims] 1. A camshaft for an intake valve and a camshaft for an exhaust valve are disposed on an upper surface of a cylinder head, and an input power transmission wheel for transmitting rotation from the crankshaft to one of the camshafts. An output power transmission wheel for transmitting rotation from the one camshaft to the other camshaft, wherein an outer housing is provided at one end of the one camshaft and rotatably provided therein. An inner rotor and a valve timing variable mechanism that relatively advances or retards them by an appropriate rotation angle are disposed, and the output power transmission wheel is fixed to the inner rotor in the variable valve timing mechanism. The outer housing in the variable valve timing mechanism is rotatably supported on a cylinder head, and the one camshaft is attached to the outer housing. And the input power transmission wheel are fixedly connected to each other. 2. A camshaft for an intake valve and a camshaft for an exhaust valve are provided on an upper surface of a cylinder head, and an input power transmission wheel for transmitting rotation from the crankshaft to one of the camshafts. An output power transmission wheel for transmitting rotation from the one camshaft to the other camshaft, wherein an outer housing is provided at one end of the one camshaft and rotatably provided therein. A variable valve timing mechanism which includes an inner rotor and relatively advances or retards them by an appropriate rotation angle, and the one cam shaft is fixed to the inner rotor in the variable valve timing mechanism, and the valve The outer housing in the variable timing mechanism is rotatably supported on the cylinder head, and the outer power housing is provided with the input power transmission wheel. A valve timing control type internal combustion engine, wherein the internal combustion engine is fixed to the output power transmission wheel. 3. A camshaft for an intake valve and a camshaft for an exhaust valve are provided on an upper surface of a cylinder head, and an input power transmission wheel for transmitting rotation from the crankshaft to one of the camshafts. An output power transmission wheel for transmitting rotation from the one camshaft to the other camshaft, wherein an outer housing is provided at one end of the one camshaft and rotatably provided therein. With two inner rotors, the outer housing and one of the inner rotors are advanced or delayed relatively by an appropriate rotation angle, and the outer housing and the other inner rotor are advanced or delayed by an appropriate rotation angle relatively appropriately. A variable valve timing mechanism is provided, and the output power transmission wheel is connected to one inner rotor of the variable valve timing mechanism by the other inner rotor. -While the one camshaft is fixed to the rotor, the outer housing of the variable valve timing mechanism is rotatably supported on the cylinder head, and the input power transmission wheel is fixed to the outer housing. A structure of a valve timing control type internal combustion engine, characterized in that: