公开(公告)号：US20210062709A1

公开(公告)日：2021-03-04

申请号：US16960502

申请日：2019-01-22

Applicant: MAZDA MOTOR CORPORATION

Inventor： Shinji TAKAYAMA ,  Takeatsu ITO ,  Michio ITO ,  Kenko UJIHARA ,  Daisaku OGAWA ,  Daisuke UMETSU

IPC: F02B11/00 ,  F02D41/02 ,  F02P5/14 ,  F02D41/14 ,  B62D15/02

Abstract: When an incremental amount of a steering angle exceeds a reference incremental amount, an ECU 60 executes vehicle attitude control of reducing an output torque of an engine, and, in a given operating range, drives a spark plug 16 to allow an air-fuel mixture to be self-ignited at a given timing, thereby executing SPCCI combustion. When there is a request for an additional deceleration from the vehicle attitude control (#12: YES) and the SPCCI combustion is performed (#13: YES), the ECU 60 prohibits ignition retardation and performs torque reduction for the vehicle attitude control, by fuel amount reduction control of reducing the amount of fuel to be supplied into a cylinder 2 (#14). On the other hand, when the SPCCI combustion is not performed (NO in #13), the ECU 60 performs the ignition retardation to attain the torque reduction for the vehicle attitude control (#15).

公开(公告)号：US20200370499A1

公开(公告)日：2020-11-26

申请号：US16811199

申请日：2020-03-06

Applicant: Mazda Motor Corporation

Inventor： Kazuhiro TAKEMOTO ,  Michio ITO ,  Masanari SUEOKA ,  Kazuhiro NISHIMURA ,  Kouji HADAMA ,  Masataka SUMITA ,  Masami NISHIDA

IPC: F02D41/38 ,  F02D41/14

Abstract: A controller for controlling a fuel injection valve and a fuel pressure adjustment mechanism sets an air-fuel ratio of a fuel-air mixture to be generated within a combustion chamber to be equal to or leaner than a theoretical air-fuel ratio, based on an operating condition of an engine; drives the fuel injection valve, based on the set air-fuel ratio; estimates a deposition amount of deposits on an injection hole of the fuel injection valve, based on an operating condition of the engine; causes the fuel pressure adjustment mechanism to increase the fuel pressure, when the estimated deposition amount of deposits exceeds a predetermined value; and restricts the fuel pressure from increasing, even when the estimated deposition amount of deposits exceeds the predetermined value, as long as the fuel-air ratio is set to an air-fuel ratio leaner than the theoretical fuel-air ratio.

公开(公告)号：US20200370500A1

公开(公告)日：2020-11-26

申请号：US16811142

申请日：2020-03-06

Applicant: Mazda Motor Corporation

Inventor： Kazuhiro TAKEMOTO ,  Michio ITO ,  Masanari SUEOKA ,  Kazuhiro NISHIMURA ,  Kouji HADAMA ,  Masataka SUMITA ,  Masami NISHIDA

IPC: F02D41/40 ,  F02F3/28 ,  F02M59/20 ,  F02B77/04

Abstract: A controller for controlling a fuel injection valve and a fuel pressure adjustment mechanism integrates a deposition amount of deposits per unit time, and estimates a deposition amount of deposits on an injection hole of the fuel injection valve. The controller causes the fuel pressure adjustment mechanism to increase a fuel pressure, when the estimated deposition amount exceeds a predetermined value, and corrects the unit deposition amount acquired by the deposition amount estimation according to the set fuel injection timing of the fuel injection valve. The controller corrects such that as compared with the unit deposition amount when the fuel injection timing is set to a first timing away from a top dead center of the piston by a first period, the unit deposition amount decreases when the fuel injection timing is set to a second timing away by a second period longer than the first period.