Campro engine in Proton
The Campro engine is the first automotive engine ever developed together with Lotus by the Malaysian carmaker, Proton.The name Campro is short for Cam Profile. This engine powers the Proton Gen-2, the Proton Satria Neo, the Proton Waja Campro, the Proton Persona as well as Proton's future models. The Campro engine is aimed to show Proton's ability to make their own engines that produces good power output and meets newer emission standards.
All Campro engines incorporate with drive-by-wire technology (specifically electronic throttle control) for better response, eliminating the need for friction-generating mechanical linkages and cables. There have been some issues with cracking oil pumps but apparently Proton have introduced a new part recently to solve this problem. A recall has not been announced.
Basic DOHC engine
The Campro CPS engine uses a variable valve lift system (Cam Profile Switching system) and a variable inlet manifold (VIM; not to be confused with the stand-alone IAFM used in the 2008 Proton Saga) to boost maximum power and improve the CPS engine's torque curve over the standard DOHC Campro engine.
The engine's Variable Intake Manifold (VIM) switches between a long intake manifold at low engine speeds and a short intake manifold at higher engine speeds. Proton is using a longer intake manifold to achieve slower air flow; as they found this promotes better mixing with fuel. The short intake manifold allows more air in faster. This is beneficial at high RPMs.
The Cam Profile Switching (CPS) system uses a trilobe camshaft to switch between two different cam profiles. One cam profile provides low valve lift, while the other cam profile has a high valve lift. The low valve lift cam profile is used at low to mid engine speeds to maintain idling quality and reduce emissions, while the high lift cam profile is used when the engine is spinning at mid to high engine speeds improve peak horsepower and torque.
VIM switches from the long to short runner at 4,800rpm, while the CPS system switches over at 3,800rpm. The result is 127 horsepower (96kW) at 6,500rpm and 150Nm of torque at 4,500rpm compared to the non-CPS Campro’s 110 horsepower (82kW) at 6,000rpm and 148Nm of torque at 4,000rpm. Proton claims that there is better response and torque at low engine speeds of between 2000 - 2500 rpm.
The new CPS engine first made its debut in the facelifted Proton GEN2 launched in Thailand, and made its first Malaysian debut in the Proton Waja Campro 1.6 Premium (CPS.
Hybrid Campro engine
In March 2007, Proton and Lotus have announced their concept model of a Proton Gen-2 powered by a hybrid powerplant that uses the Campro engine. The concept model was revealed during the 2007 Geneva Motor Show from 8 ~ 18 March 2007 .
The hybrid powerplant system, which is known as EVE system (Efficient, Viable, Environmental) will be using the same S4PH engine as the one that powers the present gasoline version of the Gen-2, combined together with a 30 kW, 144V electric motor. The main purpose of the hybrid powerplant system is to provide a hybrid system that can be retrofitted to existing models, retaining the same powerplant and also eliminates the need to develop a completely different platform, like the Honda Civic Hybrid.
The EVE Hybrid System will have 3 key technologies:-
"Micro-hybrid" start-stop system - An integrated starter-alternator system is installed to switch off the engine automatically when the engine stops, for example at the traffic light. The engine will automatically restart when the gas pedal is depressed..
Full parallel hybrid technology - Combines the existing S4PH engine with a 30 kW, 144V electric motor, resulting in higher power (141 bhp combined), higher torque (233 N-m combined), lower emission (up to 22% carbon dioxide reduction) and better fuel economy (up to 28%). The system also includes regenerative braking system..
Continuously Variable Transmission (CVT) - The CVT system provides an infinite number of gear ratios for better efficiency..
The combined power and torque for the powerplant system are as follows:-
Max power (gasoline engine only): 110 bhp (82 kW) @ 6,000 rpm
Max torque (gasoline engine only): 148 N-m @ 4,000 rpm
Max power (combined): 141 bhp (105 kW) @ 5,500 rpm
Max torque (combined): 233 N-m @ 1,500 rpm (limited to 180 N-m continuous)
Sunday, March 30, 2008
Campro engine in Proton