The invention relates to a
lubricant valve for oil pumps of internal
combustion engines, in order to supply the bearings and sliding surfaces of the engines with
lubricant in an optimum manner in order to reduce the wear. The invention is based on the problem of developing a
lubricant valve for oil pumps of internal
combustion engines, which lubricant valve combines, in particular, the functions of a cold-start valve and those of a control valve within itself with a minimum amount of installation space and is constructed in such a way that it is insensitive with respect to the
wear debris and / or
foundry sand which is entrained by the lubricant, in the process makes high throughflow quantities possible, in addition is of inexpensive construction in terms of production and
assembly technology and can be produced inexpensively, and, moreover, always operates robustly,; reliably and insusceptible to disruptions, even under extreme use conditions. The lubricant valve according to the invention for oil pumps of internal
combustion engines is distinguished, in particular, by a double
piston in a
piston guide of a
valve seat of the pump housing, the double
piston consisting of a cold-start piston which is arranged in a control piston and is arranged in a cold-start
piston guide which is arranged in the control piston, wherein,
lying opposite the cold-start
piston guide, a
piston rod is arranged on the piston head of the control piston, on which
piston rod, spaced apart from the piston head of the control piston, a working piston is arranged which the
piston rod protrudes beyond in the form of a spacer rod, wherein, adjacent to the working piston, inflow holes are arranged in the piston head of the control piston and, adjacent to the piston head,; outflow holes are arranged in the cylinder wall of the cold-start
piston guide of the control piston.