一种直喷和多点喷射结合系统
By combining direct injection and multi-point injection systems, the problem of balancing power, economy, and emissions performance of hydrogen engines under different operating conditions has been solved, achieving efficient and stable operation of the engine under all operating conditions and improving the engine's adaptability and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI YUCHAI MASCH CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing hydrogen engines struggle to balance power, economy, and emissions performance under different operating conditions, and a single injection method cannot meet the needs of different load conditions.
It adopts a system that combines direct injection and multi-point injection. By working together with the in-cylinder direct injection nozzle and the intake manifold nozzle, the injection strategy can be flexibly adjusted according to the engine operating conditions. By combining in-cylinder direct injection and intake manifold injection of hydrogen, rapid and uniform mixing of hydrogen and air can be achieved.
Maintaining good engine performance under different operating conditions, improving power output, enhancing combustion stability and economy, extending service life, and reducing costs.
Smart Images
Figure CN224515280U_ABST
Abstract
Claims
1. A system combining direct injection and multi-point injection, characterized in that, It includes a cylinder (1), an intake manifold (2), an exhaust manifold (3), a first hydrogen rail (4), and a second hydrogen rail (5). Each combustion chamber (11) in the cylinder (1) is equipped with a spark plug (111), and the spark plug (111) is controlled by an ignition coil (112); One end of the intake manifold (2) is connected to the cylinder (1) via the intake manifold (21), and the other end of the intake manifold (2) is provided with an intercooler pipe (22). One end of the exhaust manifold (3) is connected to the cylinder (1) via the exhaust manifold (31), and the other end is the exhaust tailpipe (32). Each combustion chamber of the cylinder (1) is provided with an in-cylinder direct injection nozzle (41), the in-cylinder direct injection nozzle (41) is connected to the cylinder head of the cylinder (1), and the in-cylinder direct injection nozzle (41) is connected to the first hydrogen gas rail (4). An intake nozzle (51) is provided inside the intake manifold (21), and the intake nozzle (51) is connected to the second hydrogen gas rail (5); The first hydrogen gas rail (4) and the second hydrogen gas rail (5) are supplied with hydrogen through the hydrogen cylinder group (6).
2. A direct injection and multi-point injection combination system according to claim 1, characterized in that: The first hydrogen gas rail (4) is connected to the second hydrogen gas rail (5) through the first pipeline (71), and the first pipeline (71) is provided with a second pipeline (72). One end of the second pipeline (72) is connected to the first pipeline (71), and the other end is connected to the in-cylinder direct injection nozzle (41). The end of the second hydrogen gas rail (5) away from the first pipeline (71) is connected to the air intake nozzle (51) through the third pipeline (73); The hydrogen cylinder group (6) is connected to the end of the first hydrogen rail (4) away from the first pipeline (71) via the fourth pipeline (74).
3. A direct injection and multi-point injection combination system according to claim 2, characterized in that: The first pipeline (71) is equipped with a first hydrogen pressure and temperature sensor (811) and an electronically controlled pressure regulating valve (82). The first hydrogen pressure and temperature sensor (811) and the electronically controlled pressure regulating valve (82) are located on both sides of the second pipeline (72). The first hydrogen pressure and temperature sensor (811) is located at one end of the first pipeline (71) near the first hydrogen gas rail (4), and the electronically controlled pressure regulating valve (82) is located at one end of the first pipeline (71) near the second hydrogen gas rail (5). The third pipeline (73) is equipped with a second hydrogen pressure and temperature sensor (812). The first hydrogen pressure and temperature sensor (811), the electronically controlled pressure regulating valve (82), and the second hydrogen pressure and temperature sensor (812) are connected to the vehicle's ECU.
4. A direct injection and multi-point injection combination system according to claim 2, characterized in that: The fourth pipeline (74) is provided with a mechanical pressure regulating valve (831), a fuel cut-off valve (832) and a hydrogen filter (833) in sequence along the direction close to the hydrogen cylinder group (6), and the fuel cut-off valve (832) is connected to the vehicle's ECU.
5. The direct injection and multi-point injection combined system according to claim 1, characterized in that: The intake manifold (2) is equipped with a TIP sensor (841), an electronic throttle valve (842), and a MAP sensor (843), which are connected to the vehicle's ECU.
6. A direct injection and multi-point injection combination system according to claim 1, characterized in that: The exhaust manifold (3) is equipped with an exhaust oxygen sensor (85), and the exhaust oxygen sensor (85) is connected to the vehicle's ECU.