Introduction

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. The low temperature coolant surge tank typically used on hybrid vehicles provides a pressurized reservoir for keeping the permanent coolant system pressure during the engine operation, coolant/air separation, coolant expansion and contraction, and a fill port for the assembly plant. Its design is critical to the operation of the powertrain cooling system as it must maintain a fully separated air/coolant system. The engineering test schedule contained within this specification defines the minimum performance and durability criteria necessary for design and production validation. In addition, the minimum requirements for in process testing of on-going production are outlined. The schedule is intended as a supplement to normal material inspections, dimensional checking and in process controls, and should in no way adversely influence adherence to other inspection operations.

Applicability. Bill of Material (BOM) Row 344 Surge Tank.

Remarks. This standard establishes the requirements for a Hybrid Coolant System Surge Tank Assembly. The functions, performance, design constraints, and validation required of the component are defined in this document. All requirements of this specification must be met in order to demonstrate design and production validation.