Variable valve timing control unit

摘要

A variable valve timing control unit includes an intake-side variable valve timing control apparatus, an exhaust-side variable valve timing control apparatus, an intake-side phase control valve selectively performing supply and discharge of fluid relative to an advanced angle fluid passage and a retarded angle fluid passage of the intake-side variable valve timing control apparatus, an exhaust-side phase control valve selectively performing supply and discharge of the fluid relative to the advanced angle fluid passage and the retarded angle fluid passage of the exhaust-side variable valve timing control apparatus, and a single lock control valve controlling supply and discharge of the fluid relative to unlock fluid passages of the respective intake-side variable valve timing control apparatus and the exhaust-side variable valve timing control apparatus.

主权项

1. A variable valve timing control unit comprising:
an intake-side variable valve timing control apparatus; an exhaust-side variable valve timing control apparatus, each of the intake-side variable valve timing control apparatus and the exhaust-side variable valve timing control apparatus including a driving-side rotation member which synchronously rotates with a crank shaft of an internal combustion engine, a driven-side rotation member arranged coaxially with the driving-side rotation member, a lock member which engages from one of the driving-side rotation member and the driven-side rotation member to the other of the driving-side rotation member and the driven-side rotation member for establishing an engaged state of the lock member so that the driving-side rotation member and the driven-side rotation member are in an integral rotation state, an advanced angle fluid passage allowing supply of fluid to an advanced angle chamber formed between the driving-side rotation member and the driven-side rotation member, a retarded angle fluid passage allowing supply of the fluid to a retarded angle chamber formed between the driving-side rotation member and the driven-side rotation member, an unlock fluid passage allowing supply of the fluid for releasing the engaged state of the lock member, and the driven-side rotation member of the intake-side variable valve timing control apparatus being connected to an intake cam shaft of the internal combustion engine, the driven-side rotation member of the exhaust-side variable valve timing control apparatus being connected to an exhaust cam shaft of the internal combustion engine, the variable valve timing control unit comprising: an intake-side phase control valve selectively performing supply and discharge of the fluid relative to the advanced angle fluid passage of the intake-side variable valve timing control apparatus and relative to the retarded angle fluid passage of the intake-side variable valve timing control apparatus; an exhaust-side phase control valve selectively performing supply and discharge of the fluid relative to the advanced angle fluid passage of the exhaust-side variable valve timing control apparatus and relative to the retarded angle fluid passage of the exhaust-side variable valve timing control apparatus; and a single lock control valve controlling supply and discharge of the fluid relative to the unlock fluid passages of the respective intake-side variable valve timing control apparatus and the exhaust-side variable valve timing control apparatus.