Method and device for pressure regulation in a fuel high-pressure injection system
A high-pressure injection and pressure-adjusting technology, which is applied in fuel injection devices, fuel injection pumps, charging systems, etc., and can solve the problems of injection precision target conflict, high cost, etc.
Pending Publication Date: 2022-02-08
VTESCO TECH GMBH
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- Abstract
- Description
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- Application Information
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Problems solved by technology
This requires the use of relatively expensive fuel injectors and moreover creates a conflict of objectives with maintaining injection accuracy with a small injection mass
In addition, the electrically operated engine control equipment used must provide relatively high energy
This leads to higher costs and brings other disadvantages
Method used
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Embodiment Construction
[0021] figure 1 A block diagram of a high-pressure fuel injection system is shown, in which the pressure regulation method according to the invention can be used.
[0022] In this high-pressure fuel injection system, a fuel tank (not shown) is supplied with fuel, which is delivered to the high-pressure pump unit 1 via a fuel supply line 9 . The fuel is brought to high pressure by a high-pressure pump belonging to the high-pressure pump unit 1 and then passed to the high-pressure fuel accumulator 2 . The high-pressure fuel located in the high-pressure fuel accumulator 2 is withdrawn from the high-pressure fuel accumulator 2 for carrying out the injection process and delivered to an injector arrangement 5 comprising a plurality of injectors 6 . Fuel is injected by means of these injectors into the combustion chamber 7 of the respective motor vehicle.
[0023] The high-pressure pump unit 1 is delivered by a regulator 8 with a control signal st1 which controls the operation of t...
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The invention relates to a method for pressure regulation in a fuel high-pressure injection system which has an overpressure valve and in which pressure pulsations occur that are caused by fuel being pumped into a high-pressure fuel accumulator and fuel being removed from the high-pressure fuel accumulator, said method having the following steps: detecting pressure values of the fuel located in the high-pressure fuel accumulator, comparing the detected pressure values with a pressure target value and carrying out a pressure regulation in which the fuel pressure prevailing in the high-pressure fuel accumulator is adjusted to the pressure target value, wherein during pressure regulation, a pressure peak value of the pressure values detected is used as the pressure actual value. The invention also relates to a device for pressure regulation in the fuel high-pressure injection system.
Description
technical field [0001] The invention relates to a method and a device for regulating the pressure in a high-pressure fuel injection system. Background technique [0002] In a high-pressure fuel injection system for an internal combustion engine, fuel for injection into a combustion chamber is provided by a high-pressure fuel accumulator arranged upstream of a fuel injection valve of the internal combustion engine. The required high pressure in the high-pressure fuel accumulator is generated by pumping in fuel with the aid of a high-pressure fuel pump. This pumping of fuel leads to a pressure increase in the high-pressure fuel accumulator. To inject fuel into the respective combustion chambers of the internal combustion engine, fuel is drawn from a high-pressure fuel accumulator and injected into the respective combustion chambers via fuel injection valves (fuel injectors). These injection events lead to a pressure drop in the high-pressure fuel accumulator. Pressure pulsa...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M45/00F02M59/46F02M61/04F02M61/18F02M63/00F02M65/00
CPCF02M45/00F02M61/04F02M61/18F02M63/0012F02M65/003F02M59/462F02D41/3863F02D2200/0602F02D41/3845F02D41/3836F02D2041/281F02D2041/286F02D2200/101
Inventor M·威尔科夫斯基W·萨斯勒J·肯平格
Owner VTESCO TECH GMBH