Cooling jacket for cylinder head

Patent metadata

Field	Value
Publication number	US-10323601-B2
Application number	US-201715728715-A
Country	US
Kind code	B2
Filing date	Oct 10, 2017
Priority date	Oct 10, 2017
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A cooling jacket for an engine has upper and lower bodies. The upper body includes a plurality of upper portions. Each upper portion has a top orifice and a bottom orifice. The lower body is located below the upper body and includes a plurality of lower portions. Each lower portion has a lower orifice aligned with a respective one of the bottom orifices so as to permit a coolant to flow through the lower orifice and into the bottom orifice. The coolant flows from that lower portion to the respective one of the upper portions. Each upper portion has at least one upper passageway extending through that upper portion from the bottom orifice to the top orifice so that the coolant entering the upper passageway of that upper portion flows through the upper portion to the top orifice.

First claim

What is claimed is:

1. A cooling jacket for an engine having a cylinder head with upper and lower ends, the cooling jacket comprising:
an upper body configured to fit between the upper and lower ends and comprising a plurality of upper portions, each upper portion having a top orifice and a bottom orifice formed therein; and
a lower body located below the upper body, the lower body comprising a plurality of lower portions, each lower portion being associated with a respective one of the upper portions and having a lower orifice formed therein and aligned with a respective one of the bottom orifices so as to permit a coolant to flow through the lower orifice and into the bottom orifice such that the coolant flows from that lower portion to the respective one of the upper portions;
wherein each upper portion has at least one upper passageway extending through that upper portion from the bottom orifice to the top orifice so that the coolant entering the upper passageway of that upper portion flows through the upper portion to the top orifice; and
wherein the lower body includes a coolant inlet and a first longitudinal section that fluidly connects the coolant inlet to each of the lower orifices.

2. The cooling jacket of claim 1 , wherein the lower body includes a coolant outlet fluidly connected via the first longitudinal section and a second longitudinal section of the lower body to the coolant inlet such that one portion of the coolant flows from the coolant inlet, through the first longitudinal section, through the lower orifices, and into the upper passageways, and another portion of the coolant flows from the coolant inlet, through the second longitudinal section, and to the coolant outlet, whereby the cooling jacket includes a first set of parallel coolant flow paths through the upper body and a second set of parallel coolant flow paths through the lower bodies.

3. The cooling jacket of claim 1 , further comprising an exit body fluidly coupled to the upper and lower bodies and to redistribute heat from the coolant to one of engine oil, transmission oil, or a vehicle cabin, and each upper passageway being formed from the lower body, into the upper body, and out the exit body.

4. The cooling jacket of claim 1 , wherein the upper passageway of each upper portion is isolated from the upper passageway of the other upper portions, and wherein the cooling jacket is configured to distribute an equal amount of the coolant to each of the upper passageways.

5. The cooling jacket of claim 1 , wherein the lower body includes a plurality of lower passageways therethrough.

6. The cooling jacket of claim 5 , wherein each lower portion has a spark plug opening for a spark plug, an exhaust opening for an exhaust gas valve, and an intake opening for an air intake valve, and each lower passageway permits the coolant to flow from a location adjacent the spark plug opening, to a location adjacent the exhaust opening, and to a location adjacent the intake opening, respectively.

7. The cooling jacket of claim 1 , wherein the upper and lower bodies are formed substantially within the cylinder head and in a single casting.

8. A cooling jacket for an engine having a plurality of cylinders and a cylinder head with upper and lower ends, the cooling jacket comprising:
an upper body configured to fit between the upper and lower ends and comprising a plurality of upper portions, each upper portion having a top orifice and a bottom orifice formed therein and surrounding respective valves for one of the cylinders; and
a lower body located below the upper body, the lower body comprising a plurality of lower portions, each lower portion being associated with a respective one of the upper portions and having a lower orifice formed therein and aligned with a respective one of the bottom orifices, each lower portion also having a plurality of openings including an exhaust opening for an exhaust gas valve and an intake opening for an air intake valve;
wherein each lower portion has at least one lower passageway extending through that lower portion from an entry adjacent the exhaust opening to an exit adjacent the intake opening so that the coolant entering the lower passageway of that lower portion flows from the entry to the exit.

9. The cooling jacket of claim 8 , wherein each lower portion has a spark plug opening for a spark plug, and each lower passageway surrounds the spark plug, exhaust, and intake openings and permits the coolant to flow from a location adjacent the spark plug opening, to a location adjacent the exhaust opening, and to a location adjacent the intake opening, respectively.

10. The cooling jacket of claim 8 , wherein the upper and lower bodies are formed substantially within the cylinder head and in a single casting.

11. The cooling jacket of claim 8 , wherein coolant flows in the lower passageways during both a vehicle warm-up mode and a wide open throttle mode.

12. The cooling jacket of claim 8 , wherein the plurality of lower portions are arranged in-line with each other.

13. The cooling jacket of claim 8 , wherein the lower passageway of each lower portion is isolated from the lower passageway of the other lower portions, and wherein the cooling jacket is configured to distribute an equal amount of the coolant to each of the lower passageways.

14. The cooling jacket of claim 8 , wherein each cylinder has only one exhaust gas valve and only one air intake valve.

15. The cooling jacket of claim 14 , wherein the upper and lower bodies surround the respective valves for one of the cylinders and extract heat and lower a temperature around the only one exhaust gas valve, whereby the cooling jacket improves fuel efficiency during the wide open throttle mode.

16. An engine, comprising:
a cylinder head having upper and lower ends;
a plurality of in-line cylinders arranged adjacent to the cylinder head;
a cooling jacket, comprising:
an upper body configured to fit between the upper and lower ends and comprising a plurality of upper portions, each upper portion having a top orifice and a bottom orifice formed therein and surrounding respective valves for one of the cylinders; and
a lower body located below the upper body, the lower body comprising a plurality of lower portions, each lower portion being associated with a respective one of the upper portions and having a lower orifice formed therein and aligned with a respective one of the bottom orifices, each lower portion also having a plurality of openings including an exhaust opening for an exhaust gas valve and an intake opening for an air intake valve;
wherein each upper portion has at least one upper passageway extending through that upper portion from the bottom orifice to the top orifice so that the coolant entering the upper passageway of that upper portion flows through the upper portion to the top orifice; and
wherein each lower portion has at least one lower passageway extending through that lower portion from an entry adjacent the exhaust opening to an exit adjacent the intake opening so that the coolant entering the lower passageway of that lower portion flows from the entry to the exit.

17. The engine of claim 16 , further comprising an electric pump fluidly coupled to the cooling jacket for circulating coolant through the cooling jacket.

18. The engine of claim 16 , wherein a velocity of coolant is substantially equal through each of the bottom and lower orifices.

19. The cooling jacket of claim 16 , wherein the upper and lower bodies are formed substantially within the cylinder head and i

Assignees

• Gm Global Tech Operations Llc

Inventors

• Zahdeh Akram R
• Alden Dan L
• Hayman Alan W

Classifications

• F02F1/40 Primary

  cylinder heads with means for directing, guiding, or distributing liquid stream · CPC title

• F02F1/4285

  of both intake and exhaust channel · CPC title

• F01P2003/024

  Cooling cylinder heads · CPC title

• F01P3/02

  Arrangements for cooling cylinders or cylinder heads · CPC title

• F02F1/242

  Arrangement of spark plugs or injectors · CPC title