An apparatus and method for filtering a liquid utilize a filter apparatus including a bypass filter, a full flow filter, and a flow balancing element for dividing a total inlet flow of fluid to the filter apparatus into a bypass portion, passing through the bypass filter, and a full flow portion, passing through the full flow filter. The bypass filter has a lower filtering efficiency than the full flow filter element, so that a venturi tube is not required for causing the bypass portion to pass through the bypass filter. The flow balancing element divides the flow into a desired bypass portion and a desired full flow portion, at a predetermined operating temperature. Below the operating temperature, the bypass portion increases and the full flow portion decreases, the bypass portion becoming greater than the full flow portion at a second predetermined temperature below the operating temperature.

A filter assembly comprises a housing open at one end, a filter element therein, and a plate at the open end enclosing the filter element within the housing. The filter assembly further includes a fluid flow control assembly disposed between an end of the filter element and the plate. The fluid flow control assembly includes a check valve and a relief valve seat upon which the check valve abuts to prevent flow of fluid through a by-pass passage. The check valve is held in a sealed position against the relief valve seat by a biasing member retained by the relief valve seat. The force of the biasing member is overcome when pressure in the fluid acting upon the check valve reaches or exceeds a certain level, causing the check valve to move away from the relief valve seat, and permitting the fluid to flow through the relief valve assembly to an outlet opening of the filter assembly, bypassing the filter element of the filter assembly.

A fluid filter system is disclosed for filtering heavy metals. The filter system including a filter located outside of an appliance for removing heavy metals and a filter within the appliance that is downstream from filter from the having a filter for removing the heavy metals. The filter cartridge within the appliance holding a valve open that is on the filter head in the appliance.

A filter assembly includes: a filter cartridge having filter media and a first end cap holding an axially disposed seal member, an end arrangement sized to engage against the filter cartridge and form a seal with the seal member, and an anti-rotation arrangement constructed and arranged to prevent the filter cartridge and cover arrangement from rotation relative to each other.

A filter assembly includes: a filter element having filter media; an end arrangement removably positionable over the filter element; a first abutment member and a second abutment member capable of abutting when the assembly is in a first condition and prevented from abutting when the assembly is in a second condition; and a transition arrangement to enable transition of the assembly between the first condition and second condition.

A precision additive dosing device comprising a liquid additive tank, dosing pump, filter, electric actuator, and pump control unit. Upon completion of fueling, the control unit is input with the corresponding volume of fuel just delivered. The pump starts until a time is reached that achieves the correct blend of additive for the fuel. The dosing pump delivers a constant volume of additive with time being the only variable to achieve the correct ratio of additive to fuel. Operation of the pump may be delayed or the time of pump operation may be increased during low ambient temperatures by the pump control circuit. Additionally, a heater may be used to heat the additive in similarly low temperatures.

A filter assembly includes a manifold with a base and a support ring. The support ring is received within the base such that the support ring is rotatable relative to the base. A housing of the filter cartridge has an interface positioned at an outer surface of the housing. The interface is configured to engage with a post of the support ring in order to mount the filter cartridge to the manifold.

Systems and methods for detecting a missing coalescing element in a CV system are described. In some arrangements, the described systems and methods prevent the assembly and/or re-assembly of the CV system without an appropriate coalescing element positioned within the CV system housing (e.g., during a coalescing element service operation). In some arrangements, the coalescing element depresses a spring-loaded component of a shaft that provides flow of bypass gases to the CV system. If the spring-loaded component is not depressed, significant restriction is introduced to the CV system, and an on-board-diagnostic system may detect high-crankcase pressure through existing crankcase pressure sensors and de-rate the internal combustion engine. In other arrangements, a spring-loaded mechanism within the shaft prevents a housing cover (e.g., a lid to the housing of the CV system) from being repositioned when a coalescing element is not installed within the housing.

A particle separating system for supplying a cam shaft phase adjuster with cleaned lubricating oil. The phase adjuster includes a stator, a rotor connectable to a cam shaft, and a control valve for hydraulically adjusting the rotational angular position of the rotor relative to the stator. The particle separating system includes an oil separator arranged in the flow of the lubricating oil, upstream of an oil gallery of an engine supplied with the lubricating oil, exhibiting a separation efficiency of at least 50% for particles having a size P1 and a separation efficiency of at least 90% at a size P2>P1; a particle separator arranged downstream of the oil separator and upstream of the phase adjuster or control valve, to clean the lubricating oil for the phase adjuster. The particle separator exhibits a separation efficiency of 50% at a size P3, where P1<P3<100 m.

A filter cartridge includes a filter body having a first end and a second end, and an end plug having a neck portion disposed in the first end of the filter body. The end plug includes peripheral seals disposed on its necks portions and is configured to move axially with respect to the filter body in response to forces generated by fluid pressure within the filter body during operation of the filter cartridge to force a face seal and the end plug against a seat on a filter cartridge holder. The filter cartridge holder includes a first and second platens that are spaced apart from each other to receive the filter cartridge and a clamp mechanism that can be actuated to reduce the axial spacing between the first and second platens to compress the face seal of the filter cartridge between them.