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US 6,669,453 B1Granted
Pump assembly useful in internal combustion engines
OwnerRobert H. Breeden, Peter H. Sheppard +1inventors
InventorsRobert H. Breeden, Peter H. Sheppard, Mark A. Sterrett
Life of this patent
Estimating the term…
Abstract
A pump assembly for mounting a high-pressure oil pump on an internal combustion engine where the pump in the assembly is mounted in a closed chamber and a solenoid controlled valve is mounted outside of the chamber.
Claims19
A pump assembly for pressurizing fluid for an internal combustion engine, the assembly comprising a body having a first, lower portion, a second, upper portion and a circumferential flange extending around the body between the first and second portions with the first portion below the flange;
- a crank chamber in the first portion of the body;
- a crankshaft mounted in the body, the crankshaft including a crank in the crank chamber and a drive end extending outwardly of the first portion of the body;
- a rotary drive member mounted on the drive end of the crankshaft for rotating the crankshaft in the body;
- a piston pump in the body, the pump including a first piston bore extending into the crank chamber, a first piston in the first bore, an operative connection between the crank and the piston for moving the piston back and forth in the bore in response to rotation of the crankshaft;
- an inlet port in the first portion of the body;
- a low pressure inlet passage in the body extending from the inlet port to the piston pump;
- an outlet port in the first portion of the body;
- a high-pressure outlet passage in the body extending from the pump to the outlet port;
- a solenoid controlled valve mounted on the second portion of the body;
- the high pressure outlet passage including a branch extending to the valve;
- a first passage in the body extending from the valve and into the first portion of the body;
- the valve including a solenoid operable to open and close the valve in response to electrical signals from an engine control module to control flow fluid from the outlet passage to the first passage;
- wherein the assembly may be mounted on an internal combustion engine in a pump chamber with the flange engaging a chamber cover;
- the rotary drive member, the inlet port, and the outlet port located inside the chamber and the valve located outside the chamber.
11 more elements
An internal combustion engine comprising a block;
- a pump chamber on the block, the pump chamber having a floor, a circumferential wall extending around and above the floor and a cover;
- a drive gear opening in the pump chamber and a drive gear rotated by the engine in the gear opening;
- a pump opening in the chamber cover;
- an electronic control module located outwardly of the pump chamber;
- and a high-pressure pump assembly including a first portion located in the pump chamber, means for securing the first portion to the block, a shaft journaled in the first portion of the body, the shaft including a pump drive member and a drive end, such end extending outwardly from the first portion of the body within the gear opening;
- a driven gear mounted on said shaft drive end and engaging said drive gear so that rotation of the drive gear by the engine rotates the shaft;
- a piston pump in the body, the pump including a bore, a moveable piston in the bore and an operative connection between the piston and the pump drive member so that rotation of the shaft moves the piston back and forth in the bore;
- a low pressure inlet passage extending from the block through the first portion of the body to the pump;
- a high-pressure pump outlet passage extending from the pump through the first portion of the body, outwardly of the body and into the block;
- the body including a circumferential portion closely fitted to the opening in the cover to close the crank chamber;
- a valve mounting face on the body outside of the chamber;
- and a solenoid controlled valve mounted on said face with the valve solenoid outside of the chamber;
- said high-pressure passage including a branch extending through the second portion of the body to the valve;
- and a first passage extending from the valve through the second portion of the body and into the first portion of the body, said valve including solenoid leads located outside of the pump chamber.
11 more elements
Dependencies are inferred from the claim text.