| 摘要 |
<p>A pressure regulator valve for use in fuel systems for internal combustion engines utilizing super-chargers for air supply which includes a three-part housing lamination with separate upper and lower diaphragms between the bottom and top housings and the intermediate housing. The lower diaphragm is responsive to fuel pressure and will open a valve to by-pass fuel to a fuel tank. The upper diaphragm is exposed to the pressure of super-charged air to resist the opening of the fuel by-pass valve. The effective areas of the upper and lower diaphragms is designed to have a ratio of about 4 to 1. An adjustable air by-pass valve is provided to adjust the air pressure acting on the upper diaphragm to permit ratio adjustment of the air pressure reaching the regulator to the fuel pressure reaching the engine, for example, a fuel injector leading to the engine.</p> |
