US 9,810,136 B2
Coolant-control valve
Toru Tsuchiya, Odawara (JP); Takumi Oikawa, Odawara (JP); Yoshiyuki Kanesaka, Odawara (JP); and Satoshi Ando, Odawara (JP)
Assigned to MIKUNI CORPORATION, Tokyo (JP)
Filed by MIKUNI CORPORATION, Tokyo (JP)
Filed on Dec. 1, 2014, as Appl. No. 14/556,532.
Application 14/556,532 is a continuation of application No. PCT/JP2013/065236, filed on May 31, 2013.
Claims priority of application No. 2012-126448 (JP), filed on Jun. 1, 2012.
Prior Publication US 2015/0083057 A1, Mar. 26, 2015
Int. Cl. F01P 7/14 (2006.01); F01P 11/14 (2006.01); F16K 11/085 (2006.01); F16K 31/04 (2006.01); F16K 3/24 (2006.01); F01P 7/16 (2006.01); F01P 3/20 (2006.01)
CPC F01P 7/14 (2013.01) [F01P 11/14 (2013.01); F16K 3/24 (2013.01); F16K 11/0853 (2013.01); F16K 31/041 (2013.01); F16K 31/043 (2013.01); F01P 3/20 (2013.01); F01P 7/16 (2013.01); F01P 7/167 (2013.01); F01P 2007/146 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A coolant-control valve comprising:
a valve body that is driven to control a flow rate of coolant for cooling an engine;
a casing that houses the valve body;
an actuator that rotationally operates the valve body, the actuator including a motor and a reduction gear that decelerates rotation of the motor, the reduction gear including a plurality of power transmission elements, the plurality of power transmission elements including a gear, the gear including an arch-shaped groove centered on a rotation center of the gear;
an angle stopper that is inserted into the groove and fixed to a body inside which the actuator is provided, a rotational angle range of the gear is restricted by abutment of the angle stopper against each of two end portions of the groove; and
control means for controlling the actuator and for performing an initialization process that determines a rotational angle range of the valve body based on the restricted rotational angle range of the gear.