公开(公告)号：WO2020041105A1

公开(公告)日：2020-02-27

申请号：PCT/US2019/046743

申请日：2019-08-16

Applicant: CATERPILLAR INC.

Inventor： ANDERS, Jonathan W. ,  JOHN, Bobby ,  CAMPION, Robert

IPC: F02D41/38 ,  F02D41/00 ,  F02M47/02 ,  F02M63/00 ,  F02M61/18 ,  F02B23/06 ,  F02D19/02 ,  F02D19/10

Abstract: Operating an engine (10) includes injecting a first charge of liquid fuel using a first set of nozzle outlets (64, 264) in a fuel injector (56, 256), and injecting a second charge of liquid fuel using a second set of nozzle outlets (66, 266) in a fuel injector (56, 256). The first charge is autoignited in a first engine cycle, and the second charge is autoignited in a second engine cycle, and may be used to pilot ignite a charge of gaseous fuel. Operating the engine (10) further includes limiting errors in targeting of the second charge of liquid fuel caused by transitioning the engine (10) from a first combination to a second combination of speed, load, and boost, by varying an injection pressure of the liquid fuel from the first engine cycle to the second engine cycle.

公开(公告)号：WO2020041111A1

公开(公告)日：2020-02-27

申请号：PCT/US2019/046756

申请日：2019-08-16

Applicant: CATERPILLAR INC.

Inventor： ANDERS, Jonathan W. ,  JOHN, Bobby ,  CAMPION, Robert

IPC: F02M45/08 ,  F02M47/02 ,  F02M61/18 ,  F02D41/40

Abstract: A liquid fuel injector (56) for a fuel system (44) in an internal combustion engine (10) includes two injection control valves (82, 85) for controlling two outlet checks (74, 78). A common nozzle supply cavity (90) is fluidly connected to an inlet passage (60) and supplies each of two sets of nozzle outlets (63, 66) opened and closed by the outlet checks. A first nozzle outlet set (64) forms a wider spray angle and has a first combination of outlet number and outlet size, and a second nozzle outlet set (66) forms a narrower spray angle and has a second combination of outlet number and outlet size. The first nozzle outlet set (64) produces a greater steady flow than the second nozzle outlet set (66).

公开(公告)号：WO2020018263A1

公开(公告)日：2020-01-23

申请号：PCT/US2019/040130

申请日：2019-07-01

Applicant: CATERPILLAR INC.

Inventor： CAMPION, Robert M. ,  DIERS, Dean C. ,  MAHMOOD, Sana ,  ANDERS, Jonathan ,  JOHN, Bobby ,  CHITTENDEN, Jonathan R.

IPC: F02M43/04 ,  F02M63/00 ,  F02M47/02 ,  F02M45/08

Abstract: A liquid fuel injector (56) such as for a dual fuel system (34) in an internal combustion engine (10) includes two-way injection control valves (82,85) for controlling twin outlet checks (74,78). A first set of orifices (86) are arranged in an A-F-Z pattern, and a second set of orifices are arranged in an A-F-Z pattern, within the fuel injector (56), among a high-pressure inlet passage (60), a low-pressure space (72), and first and second outlet check control chambers (68,70), respectively. A common nozzle supply cavity (90) is fluidly connected to the high-pressure inlet passage (60) and supplies each of two sets of nozzle outlets (64,66) opened and closed by the twin outlet checks (74,78).