Camshaft phaser having non-return valves

A camshaft phaser for adjusting a phase position between a crankshaft and a camshaft of a motor vehicle, the camshaft phaser comprising:

• a stator,
• a rotor configured to rotate relative to the stator, the rotor including a plurality of blades,
• a plurality of working chambers formed between the stator and the rotor, the plurality of blades respectively dividing each working chamber into a first sub-chamber and a second sub-chamber which are configured to receive hydraulic fluid so as to rotate the rotor relative to the stator, and
• a reservoir configured to store the hydraulic fluid, the reservoir fluidly connected to:
• i) each first sub-chamber via a respective first non-return valve so as to feed the hydraulic fluid to each first sub-chamber when a negative pressure is present in each first sub-chamber thereby opening each first non-return valve, and
• ii) each second sub-chamber via a respective second non-return valve so as to feed the hydraulic fluid to each second sub-chamber when a negative pressure is present in each second sub-chamber thereby opening each second non-return valve,
• wherein selected non-return valves are plastically deformed in a direction away from an open position prior to an assembly of the camshaft phaser, the selected non-return valves including each first non-return valve and/or each second non-return valve.

A camshaft phaser for adjusting a phase position between a crankshaft and a camshaft of a motor vehicle, the camshaft phaser comprising:

• a stator,
• a rotor configured to rotate relative to the stator, the rotor including a plurality of blades,
• a plurality of working chambers formed between the stator and the rotor, the plurality of blades respectively dividing each working chamber into a first sub-chamber and a second sub-chamber which are configured to receive hydraulic fluid so as to rotate the rotor relative to the stator, and
• a reservoir configured to store the hydraulic fluid, the reservoir fluidly connected to:
• i) each first sub-chamber via a respective first non-return valve so as to feed the hydraulic fluid to each first sub-chamber when a negative pressure is present in each first sub-chamber thereby opening each first non-return valve, and
• ii) each second sub-chamber via a respective second non-return valve so as to feed the hydraulic fluid to each second sub-chamber when a negative pressure is present in each second sub-chamber thereby opening each second non-return valve,
• wherein each non-return valve is resiliently formed on a common non-return valve plate, and
• wherein a group of selected non-return valves each include a separate spring configured to counteract an opening of the selected non-return valve, the group of selected non-return valves comprising each first non-return valve and/or each second non-return valve.