Fluid delivery system

Patent metadata

Field	Value
Publication number	US-10029540-B2
Application number	US-201615219120-A
Country	US
Kind code	B2
Filing date	Jul 25, 2016
Priority date	Jul 25, 2016
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A fluid delivery system for an engine is disclosed. The fluid delivery system comprises a pump, a valve module, a motor, and a displacement control module. The pump is operatively coupled with an engine and is adapted to provide a flow of a fluid. The valve module is provided in fluidic communication with the pump to control the flow of the fluid. The motor is provided in fluidic communication with the valve module to receive the flow of the fluid and generate mechanical power. The displacement control module is provided in fluidic communication with the pump and the valve module and is provided downstream of the pump and upstream of the valve module. The displacement control module controls a displacement of the pump for maintaining a constant flow rate of the fluid from the pump based, at least in part, on an engine speed regardless of compressor load.

First claim

What is claimed is:

1. A fluid delivery system for an engine, the fluid delivery system comprising:
a pump operatively coupled to the engine, the pump adapted to provide a flow of a fluid;
a valve module provided in fluidic communication with the pump, the valve module adapted to control the flow of the fluid;
a motor provided in fluidic communication with the valve module, the motor adapted to receive the flow of the fluid and generate mechanical power; and
a displacement control module provided in fluidic communication with the pump and the valve module, the displacement control module provided upstream of the valve module, the displacement control module adapted to control a displacement of the pump for maintaining a constant flow rate of the fluid from the pump based, at least in part, on an engine speed regardless of a compressor load.

2. The fluid delivery system of claim 1 , wherein the displacement control module includes:
a modulating valve controlling the pump; and
a proportional valve provided downstream of the modulating valve and upstream of the valve module.

3. The fluid delivery system of claim 1 , wherein the valve module includes:
a directional valve provided upstream of the motor;
a solenoid valve provided upstream of the motor and downstream of the displacement control module; and
a relief valve provided upstream of the directional valve and downstream of the displacement control module and parallel with respect to the solenoid valve.

4. The fluid delivery system of claim 1 , wherein the motor is further coupled to a compressor associated with a Heating, Ventilating and Air Conditioning (HVAC) unit.

Assignees

• Caterpillar Inc

Inventors

• Seeger Douglas W

Classifications

• F04B17/05

  driven by internal-combustion engines · CPC title

• E02F9/163

  Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS] (for handrails mounted on cabins E02F9/0833 takes precedence; for vehicles in general B60R21/11, B60R21/13, for fork-lift trucks B66F9/07545) · CPC title

• B60H1/00378

  for tractor or load vehicle cabins · CPC title

• E02F9/2235

  including an electronic controller · CPC title

• F04B49/002

  Hydraulic systems to change the pump delivery · CPC title