Abstract: A flow heater for vehicles is described. The flow heater has a housing, which has an inlet and an outlet. A flow channel for fluid to be heated is disposed in the housing and leads from the fluid inlet to the fluid outlet. A heating plate forms a wall of a heated section of the flow channel and carries an electric heating resistor. A calorimetric flow sensor is provided for measuring a fluid flow in the flow channel.

Abstract: A cylinder head gasket with at least one opening corresponding to a combustion chamber. The gasket comprises a stack of at least one sheet, referred to as the active sheet, that comprises at least one rib surrounding said opening(s), and at least one interposed sheet, wherein the gasket comprises at least one shim of increased thickness and disposed in the plane of the interposed sheet opposite the active sheet or active sheets, and outside the rib or ribs. The shim of increased thickness has a thickness such that it constitutes a localized increased thickness compared to the interposed sheet.