Back to results
US 2021/0010397 A1Published application
Variable valve apparatus
AssigneesHyundai Motor Company, Kia Motors Corporation, You-Seok BACK
InventorsMyung Sik CHOI, You-Seok BACK
Life of this patent
Estimating the term…
Abstract
A variable valve apparatus includes: a swing body mounted to rotate to open and close a valve; an inner body driven by a cam and mounted in the swing body so as to switch a relatively-rotatable state and a latched state with respect to the swing body; a latching pin slidably mounted in the swing body so as to switch the latched state and the relatively-rotatable state of the inner body with respect to the swing body; and a control mechanism pressing the latching pin to make the inner body be latched to the swing body.
Claims20
A variable valve apparatus comprising:
- a swing body mounted to rotate to open and close a valve;
- an inner body driven by a cam and mounted in the swing body so as to switch between a relatively-rotatable state and a latched state with respect to the swing body;
- a latching pin slidably mounted in the swing body so as to switch between the latched state and the relatively-rotatable state of the inner body with respect to the swing body;
- and
- a control mechanism pressing the latching pin to make the inner body be latched to the swing body.
2 more elements
A variable valve engine comprising:
- single variable valve apparatuses each including one inner body and mounted, respectively, at intake sides and exhaust sides of combustion chambers which correspond to the half of entire combustion chambers of the engine and have unconsecutive combustion sequences;
- a first control shaft mounted to switch a state of pressing latching pins of the single variable valve apparatuses mounted at the intake sides, respectively;
- a first motor mounted to drive the first control shaft;
- a second control shaft configured to change a state of pressing latching pins of the single variable valve apparatuses mounted at the exhaust sides;
- and
- a second motor configured to drive the second control shaft.
3 more elements
A variable valve engine comprising:
- multi variable valve apparatuses each including a plurality of inner bodies and mounted, respectively, at intake sides of combustion chambers which correspond to the half of entire combustion chambers of the engine and have unconsecutive combustion sequences;
- single variable valve apparatuses each including one inner body and mounted, respectively, at exhaust sides of the combustion chambers where the multi variable valve apparatuses are mounted, and intake sides of remaining combustion chambers;
- a first control shaft mounted to change a state of pressing first latching pins of the multi variable valve apparatuses mounted at the intake sides, respectively;
- a first motor mounted to drive the first control shaft;
- a second control shaft mounted to change a state of pressing latching pins of the single variable valve apparatuses mounted at the intake sides, respectively, and second latching pins of the multi variable valve apparatuses;
- a second motor mounted to drive the second control shaft;
- a third control shaft mounted to change a state of pressing latching pins of the single variable valve apparatuses mounted at the exhaust sides, respectively;
- and
- a third motor mounted to drive the third control shaft.
6 more elements
A method for controlling a variable valve engine, the method comprising:
- partitioning an engine operation region according to engine revolutions per minute (RPM) and a desired engine torque and classifying the engine operation region into a cylinder deactivation (CDA) with Atkinson operation region, a CDA with base operation region, an Atkinson operation region, a base with Atkinson operation region, and a base operation region in ascending order of magnitude of a load to the engine in a specific engine RPM range;
- controlling all of multi variable valve apparatuses at intake sides of combustion chambers and single variable valve apparatuses at exhaust sides of the combustion chambers to implement the zero lift, and controlling the single variable valve apparatuses at the intake sides of the combustion chambers to be driven according to an Atkinson cam profile in the CDA with Atkinson operation region;
- controlling all of the multi variable valve apparatuses at the intake sides of the combustion chambers and the single variable valve apparatuses at the exhaust sides of the combustion chambers to implement the zero lift, and controlling the single variable valve apparatuses at the intake sides of the combustion chambers to be driven according to a base cam profile in the CDA with the base operation region;
- controlling all of the multi variable valve apparatuses at the intake sides of the combustion chambers and the single variable valve apparatuses at the intake sides of the combustion chambers to be driven according to the Atkinson cam profile, and controlling the single variable valve apparatuses at the exhaust sides of the combustion chambers to be driven according to the base cam profile in the Atkinson operation region;
- controlling all of the multi variable valve apparatuses at the intake sides of the combustion chambers to be driven according to the Atkinson cam profile, and controlling the single variable valve apparatuses at the intake sides of the combustion chambers and the single variable valve apparatuses at the exhaust sides of the combustion chambers to be driven according to the base cam profile in the base with Atkinson operation region;
- and
- controlling all of the multi variable valve apparatuses and the single variable valve apparatuses to be driven according to the base cam profile in the base operation region.
4 more elements
Dependencies are inferred from the claim text.