US 11,732,667 B2
Fuel injection control device and fuel injection control method
Fumihiro Itaba, Hitachinaka (JP); Osamu Mukaihara, Hitachinaka (JP); and Satoshi Kojima, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/595,285
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Mar. 11, 2020, PCT No. PCT/JP2020/010440
§ 371(c)(1), (2) Date Nov. 12, 2021,
PCT Pub. No. WO2020/240985, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-097949 (JP), filed on May 24, 2019.
Prior Publication US 2022/0220916 A1, Jul. 14, 2022
Int. Cl. F02D 41/20 (2006.01); F02D 41/22 (2006.01)
CPC F02D 41/20 (2013.01) [F02D 41/22 (2013.01); F02D 2041/201 (2013.01); F02D 2041/2003 (2013.01); F02D 2041/2006 (2013.01); F02D 2041/2013 (2013.01); F02D 2041/2051 (2013.01); F02D 2041/2055 (2013.01); F02D 2041/224 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A fuel injection control device comprising:
a first voltage supply unit that supplies a first voltage;
a second voltage supply unit that supplies a second voltage higher than the first voltage;
a fuel injection control unit that controls the second voltage supply unit to supply the second voltage to a coil so as to open a fuel injection valve having the coil, and controls the first voltage supply unit to supply the first voltage to the coil so as to hold a valve-open state of the fuel injection valve;
a voltage measurement unit that measures and outputs voltage information based on an upstream voltage of the coil of the fuel injection valve and a downstream voltage of the coil;
a correction unit that corrects a fuel injection amount of the fuel injection valve based on the voltage information output from the voltage measurement unit; and
an abnormality detection unit that detects whether an output of the voltage measurement unit is abnormal based on the voltage information output from the voltage measurement unit.