Method of assembling variable valve timing apparatus

Abstract

A method of assembling a variable valve timing apparatus includes steps of temporarily fixing a driven-side rotation body to a base member in a first rotation restricting state by a process of engaging a first projecting and retracting member with the base member of a driving-side rotation body and the driven-side rotation body followed by a process of rotating either the base member or the driven-side rotation body, providing a supplementary member of the driving-side rotation body to the driven-side rotation body to establish a second rotation restricting state by a process of installing the supplementary member to the base member in a state where the second projecting and retracting member engages with the supplementary member and the driven-side rotation body followed by a process of rotating either the supplementary member or the driven-side rotation body, and fastening the supplementary member and the base member by using a fastening member.

1 . A method of assembling a variable valve timing apparatus comprising
 a driving-side rotation body including a base member provided with at least one supplementary member, the driving-side rotation body synchronously rotating with a crankshaft of an internal combustion engine,   a driven-side rotation body coaxially arranged with the driving-side rotation body and integrally rotating with a camshaft for opening and closing valves of the internal combustion engine,   a fluid pressure chamber formed between the driving-side rotation body and the driven-side rotation body, the fluid pressure chamber divided into an advance chamber and a retard chamber by a partition member provided on at least one of the driving-side rotation body and the driven-side rotation body, and   a first projecting and retracting member and a second projecting and retracting member selectively engaging with the driving-side rotation body and the driven-side rotation body to lock relative rotational phase of the driving-side rotation body and the driven-side rotation body at a predetermined phase or to restrict relative rotational phase of the driving-side rotation body and the driven-side rotation body within a predetermined range,   the method comprising steps of:   temporarily fixing the driven-side rotation body relative to the base member in a first rotation restricting state by a process of engaging the first projecting and retracting member with the base member and the driven-side rotation body followed by a process of rotating either the base member or the driven-side rotation body to establish a state where the driven-side rotation body rotates in one direction either in an advance direction or in a retard direction relative to the base member;   providing the supplementary member to the driven-side rotation body to establish a second rotation restricting state by a process of installing the supplementary member to the base member in a state where the second projecting and retracting member engages with the supplementary member and the driven-side rotation body followed by a process of rotating either the supplementary member or the driven-side rotation body to establish a state where the supplementary member rotates in said one direction relative to the driven-side rotation body; and   fastening the supplementary member and the base member by a use of a fastening member.   
     
     
         2 . The method of assembling the variable valve timing apparatus according to  claim 1 , wherein one of the first projecting and retracting member and the second projecting and retracting member is formed in a key form arranged to project and retract in a radial direction of the driving-side rotation body and the other one of the first projecting and retracting member and the second projecting and retracting member is formed in a pin form arranged to project and retract in an axial direction of the driving-side rotation body. 
     
     
         3 . The method of assembling the variable valve timing apparatus according to  claim 1 , wherein the step of fastening the supplementary member and the base member by the use of the fastening member follows a process of defining a predetermined amount of clearance between the second projecting and retracting member and the supplementary member. 
     
     
         4 . A method of assembling a variable valve timing apparatus comprising
 a driving-side rotation body including a first driving-side rotation member and a second driving-side rotation member, the driving-side rotation body synchronously rotating with a crankshaft of an internal combustion engine,   a driven-side rotation body coaxially arranged with the driving-side rotation body and integrally rotating with a camshaft for opening and closing valves of the internal combustion engine,   a fluid pressure chamber formed between the driving-side rotation body and the driven-side rotation body, the fluid pressure chamber divided into an advance chamber and a retard chamber by a partition member provided on at least one of the driving-side rotation body and the driven-side rotation body, and   a first projecting and retracting member and a second projecting and retracting member selectively engaging with the driving-side rotation body and the driven-side rotation body to lock relative rotational phase of the driving-side rotation body and the driven-side rotation body at a predetermined phase or to restrict relative rotational phase of the driving-side rotation body and the driven-side rotation body within a predetermined range,   the method comprising steps of:   temporarily fixing the driven-side rotation body in a first rotation restricting state where rotation of the driven-side rotation body is restricted to one direction relative to the first driving-side rotation member following a process of engaging the first projecting and retracting member with the first driving-side rotation member and the driven-side rotation body;   providing the driven-side rotation body to the second driving-side rotation member to establish a second rotation restricting state where rotation of the driven-side rotation body relative to the second driving-side rotation member is restricted to said one direction or to a direction opposite to said one direction following a process of installing the second driving-side rotation member to the first driving-side rotation member in a state where the second projecting and retracting member engages with the second driving-side rotation member and the driven-side rotation body; and   fastening the first driving-side rotation member and the second driving-side rotation member by a use of a fastening member.   
     
     
         5 . The method of assembling the variable valve timing apparatus according to  claim 4 , wherein the step of fastening the first driving-side rotation member and the second driving-side rotation member by the use of the fastening member follows a process of defining a predetermined amount of clearance between the second projecting and retracting member and the second driving-side rotation member.