# US 5,699,765 A · Cylinder head for a uniflow-scavenged two-stroke internal-combustion engine

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- Number: US 5,699,765 A
- Document ID: US5699765A
- Status: Granted
- Kind: A
- Application number: 08/771,920
- Filed: 1996-12-23
- Granted: 1997-12-23
- Earliest claimed: 1995-12-22
- Assignees: Daimler-Benz Aktiengesellschaft
- Inventors: Frank Duvinage; Markus Paule; Michael Kramer; Nils Rippert; Christian Enderle
- Web page: https://patentgrep.com/patent/US5699765A

## CPC

- F02F 1/4214: {specially adapted for four or more valves per cylinder}
- F01L 1/053: overhead type
- F01L 1/26: characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder (with coaxial valves F01L1/28)
- F02B 25/04: Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
- F02B 2075/025: {two}
- F02B 2275/20: SOHC [Single overhead camshaft]
- F02F 2001/245: {the valve stems being orientated at an angle with the cylinder axis}
- F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)

## Abstract

A cylinder head for a uniflow-scavenged two-stroke internal-combustion engine, particularly in motor vehicles, is provided with outlet valves which can be controlled by a camshaft. Outlet ducts connected with the outlet valves extend out of the cylinder head. A total of four outlet valves are provided for each cylinder, with the associated outlet ducts being guided to one side of the cylinder head. The camshaft is arranged laterally of the cylinder head opposite the outlet side of the outlet ducts. The outlet valves which are situated on the side facing away from the camshaft can be operated from the direction of the camshaft by way of operating members transversely penetrating the cylinder head.

## Claims

### Claim 1

A cylinder head for a uniflow-scavenged two-stroke internal-combustion engine, comprising outlet ducts controllable by outlet valves of a camshaft, four outlet valves respectively for each cylinder, respective outlet ducts of the outlet valves being guided to a side of the cylinder head, wherein the camshaft is arranged laterally of the cylinder head situated opposite the outlet side of the outlet ducts, and certain of the outlet valves situated on the side facing away from the camshaft being operable by the camshaft via operating members transversely penetrating the cylinder head.

### Claim 2 (depends on 1)

The cylinder head according to claim 1, wherein the outlet ducts are guided together in pairs to form one respective collecting duct.

### Claim 3 (depends on 2)

The cylinder head according to claim 2, wherein the respective outlet ducts of the two outlet valves arranged on opposite sides relative to a longitudinal axis are guided together to form a collecting duct.

### Claim 4 (depends on 1)

The cylinder head according to claim 1, wherein the operating members are push rods.

### Claim 5 (depends on 1)

The cylinder head according to claim 1, wherein the outlet valves arranged on the side of the cylinder head with the camshaft are operable via rocker levers.

### Claim 6 (depends on 4)

The cylinder head according to claim 4, wherein the outlet ducts are guided together in pairs to form one respective collecting duct.

### Claim 7 (depends on 6)

The cylinder head according to claim 6, wherein the respective outlet ducts of the two outlet valves arranged on opposite sides relative to a longitudinal axis are guided together to form a collecting duct.

### Claim 8 (depends on 5)

The cylinder head according to claim 5, wherein the outlet ducts are guided together in pairs to form one respective collecting duct.

### Claim 9 (depends on 8)

The cylinder head according to claim 8, wherein the respective outlet ducts of the two outlet valves arranged on opposite sides relative to a longitudinal axis are guided together to form a collecting duct.

### Claim 10 (depends on 9)

The cylinder head according to claim 9, wherein the operating members are push rods.