Oil control valve for cam phaser

An oil control valve for controlling a cam phaser, the oil control valve comprising:

• a valve housing having a pressure inlet port, a first bore having a first inner surface, a first port, and a second port;
• a recirculation housing having a first slot, a second slot, a second bore having a second inner surface, and a first outer surface, and wherein the recirculation housing is disposed within the first bore of the valve housing;
• a spool guide having a third port, a fourth port, a fifth port, a sixth port, a seventh port, a second outer surface, a third bore having a third inner surface, a first flat surface, and a second flat surface, and wherein the spool guide is disposed within the second bore of the recirculation housing;
• a spool having an eighth port, a ninth port, a tenth port, and an eleventh port, and wherein the spool is slidingly disposed within the third bore of the spool guide;
• a first recirculation valve having a first selectable one-way member, and wherein the first recirculation valve is disposed in the first slot of the recirculation housing and selectively provides one-way oil communication from the first port to the second port;
• a second recirculation valve having a second selectable one-way member, and wherein the second recirculation valve is disposed in the second slot of the recirculation housing and selectively provides one-way oil communication from the second port to the first port;
• a one-way inlet valve disposed in the pressure inlet port;
• and
• wherein the recirculation housing, the spool guide, and spool are each slidingly disposed to have a first, second, third, and fourth modes, the first slot of the recirculation housing includes a first recirculation switch, the second slot of the recirculation housing includes a second recirculation switch, the recirculation housing is disposed in a first position wherein the first recirculation switch prevents the first recirculation valve from opening, and the recirculation housing is disposed in a second position wherein the second recirculation switch prevents the second recirculation valve from opening.

An oil control valve for controlling a cam phaser, the oil control valve comprising:

• a valve housing having a pressure inlet port, a first bore having a first inner surface, a first port, and a second port;
• a recirculation housing having a first slot, a second slot, a second bore having a second inner surface, and a first outer surface, and wherein the recirculation housing is disposed within the first bore of the valve housing;
• a spool guide having a third port, a fourth port, a fifth port, a sixth port, a seventh port, a second outer surface, a third bore having a third inner surface, a first flat surface, and a second flat surface, and wherein the spool guide is disposed within the second bore of the recirculation housing;
• a spool having an eighth port, a ninth port, a tenth port, and an eleventh port, and wherein the spool is slidingly disposed within the third bore of the spool guide;
• a first recirculation valve having a first selectable one-way member, and wherein the first recirculation valve is disposed in the first slot of the recirculation housing and selectively provides one-way oil communication from the first port to the second port;
• a second recirculation valve having a second selectable one-way member, and wherein the second recirculation valve is disposed in the second slot of the recirculation housing and selectively provides one-way oil communication from the second port to the first port;
• a one-way inlet valve disposed in the pressure inlet port;
• and
• wherein the recirculation housing and spool are each slidingly disposed to have a first, second, third, and fourth modes, the first slot of the recirculation housing includes a first recirculation switch, the second slot of the recirculation housing includes a second recirculation switch, the recirculation housing is disposed in a first position wherein the first recirculation switch prevents the first recirculation valve from opening, the recirculation housing is disposed in a second position wherein the second recirculation switch prevents the second recirculation valve from opening, the first mode of the recirculation housing, the spool guide, and spool includes the pressure inlet port in communication with the first port, the second port in communication with a sump, and the second port is in communication with the first port via the first recirculation valve, the second mode of the recirculation housing, the spool guide, and spool includes the pressure inlet port in communication with the first port and the second port in communication with the first port via the first recirculation valve, the third mode of the recirculation housing, the spool guide, and spool includes the pressure inlet port in communication with the second port and the first port in communication with the second port via the second recirculation valve, and the fourth mode including the pressure inlet port in communication with the second port, the first port in communication with the sump, and the first port in communication with the second port via the second recirculation valve.