Internal combustion engine with injection valve
An internal combustion engine for a motor vehicle includes at least one cylinder, an injection valve associated to the cylinder for direct injection of fuel into a combustion chamber of the cylinder. The injection valve is received in a receiving opening of a cylinder head of the internal combustion engine and held by a support element in the receiving opening. The support element is secured in its rotational position by a formfitting engagement of a first formfit element on the injection valve, and by a formfitting engagement of a second formfit element on the cylinder head. A support element of this type ensures a particularly satisfactory securement of the rotational position of the injection valve. In the event of structural changes to the cylinder head or at the injection valve, it is only necessary to adapt the support element so that such modifications can be realized particularly inexpensively.
1. An internal combustion engine for a motor vehicle, comprising:
a cylinder head having at least one cylinder;
an injection valve received in a receiving opening of a cylinder head for direct injection of fuel into a combustion chamber of the cylinder and having a shaft portion and a connecting plug; and
a support element holding the injection valve in the receiving opening and configured to secure a rotational position of the support element, said supporting element having a first portion formed as a base body formfittingly surrounding at least a part of an outer circumference of the shaft portion of the injection valve and having two ends spaced from one another in a circumferential direction, two further portions extending from the ends of the first portion of the support element and forming stop faces which define there between a receiving opening in which the connecting plug of the injection valve is received, and an additional portion extending from one of the further portions and forming a detent nose formfittingly axially engaging in a bore of the cylinder head, wherein the support element has two gripping portions for assembly and disassembly of the support element, the gripping portions being spaced from one another in the circumferential direction and each formed by a peripherally closed elongated opening which is free of other components, wherein the elongated opening of one of the gripping portions ends in a direction of elongation before the detent nose, and the detent nose is located in the direction of elongation outwardly beyond the one gripping portion.
2. The internal combustion engine of claim 1 , wherein the support element is constructed to be held under tension on the injection valve and to apply a spring force between the support element and the cylinder head.
3. A motor vehicle, comprising an internal combustion engine including a cylinder head having at least one cylinder, an injection valve received in a receiving opening of a cylinder head for direct injection of fuel into a combustion chamber of the cylinder and having a shaft portion and a connecting plug, and a support element holding the injection valve in the receiving opening and configured to secure a rotational position of the support element, said support element having a first portion formed as a base body formfittingly surrounding at least a part of an outer circumference of the shaft portion of the injection valve and having two ends spaced from one another in a circumferential direction, two further portions extending from the ends of the first portion of the support element and forming stop faces which define there between a receiving opening in which the connecting plug of the injection valve is received, and an additional portion extending from one of the further portions and forming a detent nose formfittingly axially engaging in a bore of the cylinder head, wherein the support element has two gripping portions for assembly and disassembly of the support element, the gripping portions being spaced from one another in the circumferential direction and each formed by a peripherally closed elongated opening which is free of other components, wherein the elongated opening of one of the gripping portions ends in a direction of elongation before the detent nose, and the detent nose is located in the direction of elongation outwardly beyond the one gripping portion.
4. The motor vehicle of claim 3 , wherein the supporting element is constructed to be held under tension on the injection valve and to apply a spring force between the support element and the cylinder head.