초록 ▼

An injection system for an internal combustion engine has a prefeed pump for feeding fuel from a fuel tank, a high-pressure pump, which is situated downstream of the prefeed pump, for feeding the fuel into at least two injectors, a fuel distributor which is situated downstream of the high-pressure p

An injection system for an internal combustion engine has a prefeed pump for feeding fuel from a fuel tank, a high-pressure pump, which is situated downstream of the prefeed pump, for feeding the fuel into at least two injectors, a fuel distributor which is situated downstream of the high-pressure pump and which is designed to distribute the fuel to the injectors, a pressure control or pressure limiting valve situated downstream of the high-pressure pump and by which the pressure to be produced in the fuel distributor can be adjusted or limited, and a pressure sensor for determining a pressure downstream of the high-pressure pump and upstream of the pressure control or pressure limiting valve, wherein the pressure sensor, the pressure control or pressure limiting valve and the fuel distributor are formed in a high-pressure module, and the high-pressure module is formed as a structural unit with the high-pressure pump.

대표청구항 ▼

1. An injection system for an internal combustion engine, comprising: a prefeed pump for feeding fuel from a fuel tank,a high-pressure pump disposed downstream from the prefeed pump, for feeding the fuel into at least two injectors,a fuel distributor disposed downstream from the high-pressure pump,

1. An injection system for an internal combustion engine, comprising: a prefeed pump for feeding fuel from a fuel tank,a high-pressure pump disposed downstream from the prefeed pump, for feeding the fuel into at least two injectors,a fuel distributor disposed downstream from the high-pressure pump, which is designed to distribute the fuel to the injectors,a pressure control or pressure limiting valve disposed downstream from the high-pressure pump, with which the pressure to be produced in the fuel distributor can be adjusted or limited,a pressure sensor for determining a pressure downstream from the high-pressure pump and upstream from the pressure control or pressure limiting valve, wherein the pressure sensor, the pressure control or pressure limiting valve and the fuel distributor are formed in a high-pressure module, and the high-pressure module is formed as a structural unit with the high-pressure pump, andat least one of: (a) a temperature sensor formed in the high-pressure module for determining a temperature of the fuel downstream from the high-pressure pump and upstream from the pressure control or pressure limiting valve,(b) a first hydraulic resistance element disposed downstream from the fuel distributor and upstream from the injectors in the high-pressure module, and(c) a fuel accumulator formed in the high-pressure module is disposed downstream from the pressure control or pressure limiting valve, said fuel accumulator being hydraulically coupled to a leakage drain of the injectors. 2. The injection system according to claim 1, wherein an additional hydraulic resistance element is hydraulically disposed in the high-pressure module between the leakage drain and the fuel accumulator. 3. The injection system according to claim 1, wherein the high-pressure module is designed as a structural unit with the prefeed pump. 4. A method for injecting fuel in an internal combustion engine, comprising the steps of: feeding fuel from a fuel tank by a prefeed pump to a high pressure pump disposed downstream from the prefeed pump,feeding the fuel into at least two injectors by said high pressure pump via a fuel distributor disposed downstream from the high-pressure pump, which is designed to distribute the fuel to the injectors,adjusting or limiting the pressure to be produced in the fuel distributor by a pressure control or pressure limiting valve disposed downstream from the high-pressure pump,determining a pressure downstream from the high-pressure pump and upstream from the pressure control or pressure limiting valve by a pressure sensor, wherein the pressure sensor, the pressure control or pressure limiting valve and the fuel distributor are formed in a high-pressure module, and the high-pressure module is formed as a structural unit with the high-pressure pump, andperforming at least one step selected from the group consisting of: determining a temperature of the fuel downstream from the high-pressure pump and upstream from the pressure control or pressure limiting valve by a temperature sensor formed in the high-pressure module,influencing downstream from the fuel distributor and upstream from the injectors in the high-pressure module using a first hydraulic resistance element, andfeeding back part of the fuel fed by the high pressure pump into the fuel tank via a fuel accumulator formed in the high-pressure module, disposed downstream from the pressure control or pressure limiting valve, and hydraulically coupled to a leakage drain of the injectors. 5. The method according to claim 4, wherein an additional hydraulic resistance element is hydraulically disposed in the high-pressure module between the leakage drain and the fuel accumulator. 6. The method according to claim 4, wherein the high-pressure module is designed as a structural unit with the prefeed pump. 7. An injection system for an internal combustion engine, comprising: a prefeed pump coupled with a fuel tank,a high-pressure pump disposed downstream from the prefeed pump,a fuel distributor disposed downstream from the high-pressure pump and coupled with at least two injectors,a pressure control or pressure limiting valve disposed downstream from the high-pressure pump,a pressure sensor for determining a pressure downstream from the high-pressure pump and upstream from the pressure control or pressure limiting valve, wherein the pressure sensor, the pressure control or pressure limiting valve and the fuel distributor are formed in a high-pressure module, and the high-pressure module is formed as a structural unit with the high-pressure pump, andat least one of: (a) a temperature sensor formed in the high-pressure module for determining a temperature of the fuel downstream from the high-pressure pump and upstream from the pressure control or pressure limiting valve,(b) a first hydraulic resistance element disposed downstream from the fuel distributor and upstream from the injectors in the high-pressure module, and(c) a fuel accumulator formed in the high-pressure module is disposed downstream from the pressure control or pressure limiting valve, said fuel accumulator being hydraulically coupled to a leakage drain of the injectors. 8. The injection system as claimed in claim 7, wherein an additional hydraulic resistance element is hydraulically disposed in the high-pressure module between the leakage drain and the fuel accumulator. 9. The injection system as claimed in claim 7, wherein the high-pressure module is designed as a structural unit with the prefeed pump.