US 11,852,086 B2
Controller and control method for engine
Yuki Suzuki, Kariya (JP); and Tomihisa Tsuchiya, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-Ken (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken (JP)
Filed on Mar. 20, 2023, as Appl. No. 18/186,208.
Claims priority of application No. 2022-049635 (JP), filed on Mar. 25, 2022.
Prior Publication US 2023/0304452 A1, Sep. 28, 2023
Int. Cl. F02D 41/00 (2006.01); F02M 25/028 (2006.01); F02M 25/025 (2006.01)
CPC F02D 41/0025 (2013.01) [F02M 25/025 (2013.01); F02M 25/028 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A controller for an engine, wherein
the engine includes:
a cylinder;
intake ports connected to the cylinder;
intake valves that respectively correspond to the intake ports, each of the intake valves being configured to selectively allow for and block connection between the corresponding one of the intake ports and the cylinder; and
water injection valves installed in the respective intake ports, each of the water injection valves being configured to inject water to the corresponding one of the intake ports,
the controller comprises processing circuitry that is configured to selectively execute, for each of the intake ports, a synchronous injection that causes the corresponding one of the water injection valves to inject water only during a valve opening period of the corresponding one of the intake valves and an asynchronous injection that causes the corresponding one of the water injection valves to inject water during a valve closing period of the corresponding one of the intake valves, and
the processing circuitry is configured to perform, when executing a synchronous/asynchronous concurrent injection in which the intake ports includes an intake port in which the synchronous injection is executed and an intake port in which the asynchronous injection is executed, a switching process of switching the intake port in which the asynchronous injection is executed.