A
Anonymous
Guest
Hey Yall,
Some of you may have responded to my questiuons about the highmilage briggs and stratton. This is more or less a follow up. I hope this diagram comes trough but this is what I was thinking of. I wanted to make a 3.5 hp engine as fuel efficient as possible. It is used to power a small car tat must maintain 15 mph.
I am pretty sure that if I can get as much power out of each stroke then my efficiency will go up. So my idea was to combine some aspects of a diesel engine with my gas. First I want to raise compression as much as possible because my part of my idea is based on having the high compression of the engine spark the ignition of my engine much like a diesel. This part may have to change, wether I can use something like a glowplug or have to keep the sparkplug. Anyway, I want to try Direct Injection on my engine. I have read that it is being tried and the results are extremely good with power boost and have fuel economy. My diagram shows a alternator running off the engine, with power going to a high pressure fuel pump (brown) and to a ecu (purple) unit. (This ecu unit will be very simple. I have talked to some EE majors in class and they say it would be very possible to engineer a ecu that can signal the injector to open and close using a signal from a sensor possitioned on the flywheel.) (Light blue) is a sensor to monitor where the piston is in relation to stroke. Like just a magnet and a sensor to count how many times it rotates. The engine really only will need to be run at one speed so if I can not engineer a way to control the time the fuel injector opens at other rpms besides the one desired it shouldn't be to bad. I want the fuel to be injected at tdc or just after and have a high enough compression ratio that the fuel with combust upon injection. I have seen high pressure pumps for gas cars and they now are coming out with DI injectors for gas engines so if I can get the timing right and make a bottom end that can handle the strain everything should work right??
Please let me know what yall think. Im sure I have left out stuff and my post is prob a little confusing but I hope not.
Thanks
Paul
Some of you may have responded to my questiuons about the highmilage briggs and stratton. This is more or less a follow up. I hope this diagram comes trough but this is what I was thinking of. I wanted to make a 3.5 hp engine as fuel efficient as possible. It is used to power a small car tat must maintain 15 mph.
I am pretty sure that if I can get as much power out of each stroke then my efficiency will go up. So my idea was to combine some aspects of a diesel engine with my gas. First I want to raise compression as much as possible because my part of my idea is based on having the high compression of the engine spark the ignition of my engine much like a diesel. This part may have to change, wether I can use something like a glowplug or have to keep the sparkplug. Anyway, I want to try Direct Injection on my engine. I have read that it is being tried and the results are extremely good with power boost and have fuel economy. My diagram shows a alternator running off the engine, with power going to a high pressure fuel pump (brown) and to a ecu (purple) unit. (This ecu unit will be very simple. I have talked to some EE majors in class and they say it would be very possible to engineer a ecu that can signal the injector to open and close using a signal from a sensor possitioned on the flywheel.) (Light blue) is a sensor to monitor where the piston is in relation to stroke. Like just a magnet and a sensor to count how many times it rotates. The engine really only will need to be run at one speed so if I can not engineer a way to control the time the fuel injector opens at other rpms besides the one desired it shouldn't be to bad. I want the fuel to be injected at tdc or just after and have a high enough compression ratio that the fuel with combust upon injection. I have seen high pressure pumps for gas cars and they now are coming out with DI injectors for gas engines so if I can get the timing right and make a bottom end that can handle the strain everything should work right??
Please let me know what yall think. Im sure I have left out stuff and my post is prob a little confusing but I hope not.
Thanks
Paul
