Rocker arm assembly with rotation-locking mechanism

A rocker arm assembly, comprising:

• a rocker arm comprising:
• a body comprising a rocker shaft bore;
• a valve end extending from the body;
• a force-receiving portion;
• and
• a locking pin;
• a rocker shaft comprising:
• a locking groove, wherein the locking pin is biased to engage the locking groove;
• a channel;
• and
• an oil path enclosed in the rocker shaft, the oil path configured to supply hydraulic pressure within the rocker shaft to the channel;
• and
• a rotation-locking mechanism comprising a pressure pin configured to slide in the channel,
• wherein the oil path is configured to supply oil pressure to the pressure pin within the rocker shaft, and
• wherein a portion of the locking groove is configured to abut the locking pin in the rocker arm to prevent the rocker arm from rotating on the rocker shaft.

A rocker arm assembly, comprising:

• a rocker arm comprising:
• a body comprising a rocker shaft bore;
• a valve end extending from the body;
• a force-receiving portion;
• and
• a locking pin;
• a rocker shaft comprising:
• a locking groove, wherein the locking pin is biased to engage the locking groove;
• a channel;
• and
• an oil path enclosed in the rocker shaft, the oil path configured to supply hydraulic pressure within the rocker shaft to the channel;
• and
• a rotation-locking mechanism comprising the locking pin or a pressure pin configured to slide in the channel,
• wherein the oil path is configured to supply oil pressure to the locking pin or the pressure pin within the rocker shaft,
• wherein the locking pin of the rocker arm is configured to slide in the rocker arm between a locked position, where the locking pin in the rocker arm abuts the locking groove, and an unlocked position, where the locking pin in the rocker arm is withdrawn into the rocker arm.

A rocker arm assembly, comprising:

• a rocker arm comprising:
• a body comprising a rocker shaft bore;
• a valve end extending from the body;
• a force-receiving portion;
• and
• a locking pin;
• a rocker shaft comprising:
• a locking groove, wherein the locking pin is biased to engage the locking groove;
• a channel;
• and
• an oil path enclosed in the rocker shaft, the oil path configured to supply hydraulic pressure within the rocker shaft to the channel;
• and
• a rotation-locking mechanism comprising the locking pin or a pressure pin configured to slide in the channel,
• wherein the oil path is configured to supply oil pressure to the locking pin or the pressure pin within the rocker shaft,
• wherein the rocker arm assembly further comprises a locking pin bore through the rocker shaft, a plate mounted over the locking pin bore, and a spring biased against the plate and the locking pin in the rocker arm.